How to choose a photo album? | Articles | “Photosphere”

What are minilabs?###

In modern photo laboratories, the bulk of photographs are printed on special machines called minilabs. This equipment is focused on printing small and medium formats – usually from 10 x 15 to 30 x 90 cm inclusive. The peculiarity of minilabs is the optimization of processes for mass photo printing of standard (not arbitrary) formats.

Using a special laser or LED head, the image from the RGB graphic file is exposed on photo paper with a photosensitive emulsion, then the print goes through the classic “wet” process. Modern minilabs, combined with technologies for working over a local network, make it possible to print 1000-1800 digital prints of 10 x 15 per hour or more.

When printing from photographic film, a negative or slide is scanned with a special built-in scanner, then work with the image is done in the same way as with a regular file. In small laboratories, where stopping production is not too critical for the business, there is usually one machine. In medium and large laboratories, less than 2-3 high-performance minilabs are rarely installed.

The photo printing operator makes color correction.

Over the past few years, the market for minilab manufacturers has narrowed to two giants – Noritsu and Fuji. According to unofficial data, at this time attempts were made to unite the relevant divisions into a single corporation, but the Antimonopoly Committee of Japan did not allow this.

As a result, today both companies produce almost identical minilabs, but under different logos. All other minilab manufacturers have ceased operations. Recently, Chinese manufacturers, in particular Sophia, have begun to appear on the market.

Despite the fact that their minilabs actually copy Noritsu, the quality of these machines leaves much to be desired, so such machines are used mainly in laboratories without any significant requirements for print quality. Apparently, the share of such machines in the world is still insignificant.

In addition to minilabs, there are printing machines for large formats. The leader of “large format” in our time is the Italian manufacturer Durst. In general, the printing technologies on these machines are the same as on minilabs. The main differences are the possible print formats, resolution and color gamut, which tends to be slightly higher for larger machines.

Photoshop: image size and resolution

Pixel dimensions change the total number of pixels across the width and length of the image. Resolution is a measure of the clarity of detail in a raster image and is measured in pixels per inch (ppi). The more pixels per inch, the higher the resolution. In general, a higher resolution image results in a higher quality print.

The same image at 72‑ppi and 300‑ppi; increased to 200%

If the image is not resampled (see Resampling), the amount of image data remains the same when the print size or resolution changes. For example, when you change a file’s resolution, its height and width are changed so that the amount of image data remains the same.

Photoshop lets you see the relationship between image size and resolution in the Image Size dialog box (Image > Image Size). Clear the Interpolation option as there is no need to change the amount of image data.

Then change the width, height or resolution. When one of the values ​​changes, the others will be brought into line with the first.

Dimensions in pixels are equal to the product of the dimensions of the output document and the resolution.

A. Original dimensions and resolution B. Reduce resolution without changing pixel dimensions (no resampling). C. Reducing the resolution while maintaining the same document dimensions leads to an increase in pixel dimensions (resampling).

If you need to quickly display the current dimensions of a document image, use the help window at the bottom of the document window.

  1. Move the cursor over the file information field and hold down the mouse button.

Image file size is the physical size of the file in which the image is stored. It is measured in kilobytes (KB), megabytes (MB), or gigabytes (GB). The file size is proportional to the pixel dimensions of the image.

The higher the number of pixels, the more detailed the image obtained when printed. However, storing them requires more disk space and slows down editing and printing.

Thus, when choosing a resolution, a compromise must be made between image quality (which must contain all the necessary data) and file size.

Another factor that affects file size is its format. Due to differences in compression methods used in the GIF, JPEG, PNG, and TIFF file formats, file sizes with the same pixel dimensions can vary greatly. The bit depth of the color and the number of layers and channels also affect the file size.

Photoshop supports maximum image pixel dimensions of 300,000 horizontal and vertical. This limitation determines the maximum permissible size and resolution of the image on the screen and when printing.

Monitor resolution is described in dimensions (in pixels). For example, if the monitor resolution and the pixel dimensions of the photo are the same, then when viewed at 100% scale, the photo will occupy the entire screen.

The size of the image on the screen depends on a combination of factors – the size of the image in pixels, the size of the monitor and the resolution of the monitor.

Display 620 x 400 pixel images on various monitor sizes and resolutions.

When preparing images for viewing on the screen, you should use a monitor with the lowest possible resolution.

Printer resolution is measured in dots per inch, dpi. Generally, the more dots per inch, the better the quality of the printed image. Most inkjet printers have a resolution of 720 to 2880 dpi. (Technically speaking, unlike photo output devices and laser printers, inkjet printers leave microscopic blots.)

Printer resolution is different from, but related to, image resolution. To print a high-quality photograph on an inkjet printer, the image resolution must be at least 220 ppi.

Screen lineage is the number of dots or halftone cells produced per inch when printing images in grayscale or color separation mode. Screen lineature (also called screen frequency) is measured in lines per inch (lpi), that is, lines of cells per inch in a halftone screen. The higher the resolution of the output device, the higher (fine) the apparent frequency of the raster.

The relationship between image resolution and screen lineature determines the quality of detail in the printed image.

To obtain the highest quality halftone image, an image whose resolution is one and a half or even two times greater than the screen lineature is usually used.

But for some images and output devices, lower resolutions can produce good results. To determine your printer’s screen size, you must consult your printer’s documentation or your service provider.

Some 600 dpi photo output devices and laser printers use screen technologies other than half-toning. If you are printing an image from such a device, check with your service provider or printer documentation for guidance on selecting the image resolution.

Examples of screen lineature

A. 65 lpi: Coarse grain typically used for newsletters and grocery coupons B. 85 lpi: Medium grain used for newspaper printing C. 133 lpi: Fine grain typically used for four-color magazine printing D. 177 lpi: very fine grain typically used for annual reports and art books

If you plan to print an image using a halftone screen, the range of suitable image resolutions depends on the screen lineature of the output device. Photoshop can determine the recommended image resolution based on the raster lineage of the output device.

If the image resolution is more than 2.5 times the raster frequency, a warning message will appear when you try to print the image. This means that the image resolution is higher than what is required for printing on this printer. Save a copy of the file and then lower the resolution.

  1. Choose Image > Image Size.
  2. In the “Raster” field, enter the raster lineature of the output device. If necessary, select a different unit of measurement.

    Please note that the screen lineature value is used only to calculate the image resolution and does not determine the screen lineature for printing.

  3. In the “Quality” field, you can select the following options:

    Resolution is equal to the raster lineature (not lower than 72 pixels per inch).

    The resolution is 1.5 times the screen lineature.

    The resolution is 2 times the screen lineature.

  1. Do one of the following.
    • Select View > Print Size.
    • Select the Hand Tool or the Scale Tool, and then click the Stamp Size button in the Options bar.

    The screen image size will approximately correspond to the print size specified in the Document Size field in the Image Size dialog box. The size of the print on the screen depends on the size and resolution of the monitor.

    The Print Size command is not available in the Creative Cloud version.

Resampling changes the amount of image data when changing its pixel dimensions or resolution. When downsampling (reducing the number of pixels), the image loses some information.

When resampling (increasing the number of pixels or increasing the resolution), new pixels are added. The interpolation method determines how pixels are removed or added.

Pixel resampling

A. Downsampling B. No change C. Resampling (selected pixels are displayed for each set of images)

Please be aware that resampling may result in reduced image quality. For example, resampling an image to a larger pixel size reduces its detail and sharpness. Applying the Unsharp Mask filter to a resampled image can sharpen details in the image.

You can avoid resampling by scanning or creating images with a sufficiently high resolution. To view the results of resizing in pixels or printing proofs at different resolutions, resample a duplicate of the original file.

Photoshop resamples an image using interpolation techniques
, assigning color values ​​to new pixels based on the color values ​​of existing pixels. The method to use can be selected in the Image Size dialog box.

A fast but less accurate method that follows the pixels of an image. This technique is used in illustrations that contain unsmoothed edges to maintain crisp edges and create a smaller file size. However, this method can create jagged edges that become noticeable when you distort or scale the image, or perform many selection operations.

This method adds new pixels by calculating the average color value of the surrounding pixels. It produces results of average quality.

A slower but more accurate method based on analyzing the color values ​​of surrounding pixels. By using more complex calculations, bicubic interpolation produces smoother color transitions than neighbor interpolation or bilinear interpolation.

A good method for reducing image size based on bicubic interpolation with increased sharpness. This method allows you to preserve the details of the resampled image. If Bicubic Sharper interpolation makes some areas of the image too sharp, try using Bicubic Interpolation.

You can specify the default interpolation method to use when resampling image data in Photoshop. Choose Edit > Preferences > General (Windows) or Photoshop > Preferences > General (Mac OS), and then choose a method from the Image Interpolation menu.

Changing the pixel dimensions of an image affects not only its size on the screen, but also the quality of the image on screen and when printed, that is, the print size or image resolution.

  1. Choose Image > Image Size.
  2. To save the current ratio between height and width in pixels, select Maintain Aspect Ratio. This function automatically changes the width when the height changes and vice versa.
  3. In the Dimension fields, enter values ​​for the width and height.

    To enter values ​​as a percentage of the current dimensions, select percentage as the unit of measurement. The new image file size appears at the top of the Image Size dialog box (the old size appears in parentheses).

  4. Make sure Interpolation is selected and select the interpolation method.
  5. If your image contains layers with styles applied to it, select Scale Styles to scale the effect of the styles on the resized image. This feature is only available if Maintain Proportions is selected.
  6. When finished changing the settings, click the “OK” button.

    For best results when creating a smaller image, downsample and then apply the Unsharp Mask filter. To create a larger image, rescan the image at a higher resolution.

When preparing an image for printing, it is useful to set the image size by specifying the print dimensions and image resolution. These two parameters, called document size, determine the total number of pixels and therefore the file size of the image.

Document size also determines the base size of an image when placed in another application.

You can control the print size using the Print command, but changes made by the Print command will only be reflected in the printed image—the image file size will not change.

If resampling is used for a given image, you can change the print size and resolution independently of each other (thereby changing the total number of pixels in the image).

If resampling is turned off, you can change either the image dimensions or resolution – Photoshop will automatically change the remaining value, maintaining the total number of pixels.

In general, to obtain the highest quality print, you should first resize and resample without resampling. Only then, if necessary, can resampling be performed.

  1. Choose Image > Image Size.
  2. Change the pixel dimensions, image resolution, or both.
    • To change only the print dimensions, or just the dimension and proportionally change the total number of pixels in the image, select Interpolation, and then select an interpolation method.
    • To change the print size and resolution without changing the total number of pixels in the image, do not select Interpolation.
  3. To save the current ratio between the height and width of the image, select the “Save proportions” option. This function automatically changes the width when the height changes and vice versa.
  4. In the Print Size field, enter the new height and width values. If necessary, select a new unit of measurement. Note that the Width field in the Columns feature uses the width and spacing between columns specified in the Units and Rulers settings.
  5. Enter a new value in the Resolution field. If necessary, select a new unit of measurement.

    To restore the values ​​in the Image Size dialog box to their original values, Alt-click (Windows) or Option-click (Mac OS) the Restore button.

The file size depends on the pixel resolution of the image and the number of layers it contains.

Objects with more pixels produce better quality prints, but take up more disk space and require more processing and printing time.

Image file size information is displayed at the bottom of the application window.

Size matters. how to choose a format for your scrapbook?

How to choose a photo album? | Articles | "Photosphere"

Page from scrapbook 30×30 cm Gabrielle Pollaco

Each experienced scrapper has his own approach to work, and of course, he has his own favorite sizes. All sizes have their advantages and disadvantages. Often craftswomen prefer completely non-standard sizes, which allow them to create scrapbooks as conveniently and quickly as possible and use their creativity. Let’s look at the main options.

15×15 cm

This is the smallest of the standard scrapbook sizes. In the Western scrap world it may be recognized as 6×6 inches. In this size you can find a good selection of materials for scrapbooking, in particular albums, blanks and paper sets. For an album of this format, you can cut a sheet of scrapbooking paper 30×30 cm into 4 equal parts, although often it is simply a pity to cut a designer sheet with beautiful patterns.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper set 15×15 cm Olivia from BasicGrey

This format is convenient to use if there are enough photographs and memorabilia to devote the entire mini-album to one topic or event. For example, an annual vacation to the sea or a child’s birthday can be an excellent theme for a separate mini-album. A children’s scrapbooking album also looks very advantageous in this size.

Among the disadvantages of the 15×15 cm format, many scrappers cite the relatively small page size, which does not allow placing several large photographs and allowing flights of fancy to unfold. On the other hand, working in such small sizes can become one of the stages of creative development – why not try this task for yourself – fit within the 15×15 size frame and create something really interesting.

One of the important positive aspects of this format is its ease of portability – such a baby will fit into any woman’s handbag.

How to choose a photo album? | Articles | "Photosphere"

Scrapbook size 15×20 cm, work by Melissa Thiesse

20×20 cm

The album format of 20×20 cm has a Western counterpart of 8×8 inches. This is one of the classic album sizes in scrapbooking, a kind of golden mean between the small size of 15×15 cm and the classic large 30×30 cm. In specialized scrapbooking stores you can find many options for paper of this size; most leading manufacturers have not ignored it.

There is an opinion that this format is optimal for pages with photographs measuring 10×15 cm. This is especially true when you have photographs of not the best quality that cannot be printed in a larger format.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper set 20×20 cm Calais from 7gypsies

A photograph can be conveniently placed on one page, and the viewer can easily assess the integrity of the work at one glance. The 20×20 cm format is suitable for those who only need a small amount of decorations, but at the same time it does not limit creativity and makes it possible to place a sufficient amount of decor. For many beginners in scrapbooking, this size may be optimal, since it provides enough space to work, but is not intimidating by the size of the empty space, such as, for example, the size of 30×30 cm. In general, this is a very convenient format for working, the pages are harmonious and cozy, photographs are not lost in the background, and journaling is conveniently hidden in secrets or under a photograph.

Don’t forget about the practicality of this size, because thanks to the small format, such albums are easy to store and carry.

30×30 cm

This is a classic large size scrapbook. In inches it measures 12×12 inches. Now in the scrap industry this is the most common format of paper and materials for scrapbooking. You can find many options for sets of paper, stickers, die-cuts, blanks and albums from each manufacturer for this size. Of course, such paper will cost a little more than its smaller counterparts, but once you try it in your work, you will be able to appreciate all the advantages.

The square shape of this paper makes it very easy to create balance on the page. Additionally, this size also eliminates the need to trim the paper, which is especially important if you don’t have a trimmer.

How to choose a photo album? | Articles | "Photosphere"

A page from a scrapbook measuring 30×30 cm Gerry van Gent

The 30×30 cm format is especially good to use if you have a lot of photos at hand that you want to use and can’t choose. And for those who are especially creative, there will be room not only for memories in the form of photographs, but also space for decorations and decor. The 30×30 cm format is suitable for those who feel cramped in the small formats 15×15 and 20×20 cm. After all, with the right approach, large pages turn out to be very concise, and nothing interferes with the flight of thought. The finished albums in the classic large square format look very professional and serious; you will definitely want to keep them for many years and will not be ashamed to show them to all your friends and acquaintances.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper Decoration 30×30 cm from Melissa Frances

This is an indispensable size if you want to create a truly monumental work, for example, a large family album. Well, for some occasions, for example, a wedding scrapbook, this format seems to be the only right option. After all, you will definitely want to print beautiful professional wedding photographs in a large format, for example 15×21, and they will delight the owners with pleasant memories for a long time.

Although for many beginners in scrapbooking, the 30×30 size may be difficult to master at first, and many scrappers do not work in this format at all. Some craftswomen say that the main problem with 30×30 pages is that there is too much free space and the layout looks empty. And of course, most likely, an album of such a “weighty” format will live in your home, and it will not be so easy to move it for display.

Often, scattered pages “about life” are created in the 30×30 cm format, which tend to be born with or without reason. They gradually accumulate in a drawer, and over time they can make a good album telling the chronological story of the family’s life.

21×30 cm

This is a well-known and widespread A4 format. Some may note that creating scrapbooks in this format is not stylish, but we cannot agree with this. This album size is very convenient. Firstly, with this format you can significantly save on your work budget. In regular hobby stores you can purchase inexpensive colored pastel paper for the base of the pages.

The design paper that will be used for the A4 album will be trimmed, leaving pieces for decoration and backing on other pages. Moreover, this album format can be created in both vertical and horizontal versions, and each of them will look quite original. The practicality of this option cannot be denied, because finished pages in A4 format can be stored in the most ordinary files.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking album size 15×30 cm from Pink Paislee

For those with more memorabilia than photos, you won’t have to worry about wasted space on the page—there’s only so much space to fill. For scrappers who love to create, but get more pleasure from the result than from the process, or are limited in time, creating such a page is much faster and easier than a whole 30×30. Although the A4 size seems to be a rather “non-scrap” format, many experienced craftswomen, including foreign ones, adhere to this particular format.

Of course, there is no consensus in the world of scrapbooking as to which album format is optimal. In addition, the question remains open as to which shape has more advantages – square or rectangular. Some people don’t stop at just one and prefer to dedicate different albums to different events. In many ways, the choice of size depends on how many and what kind of photographs you plan to use in your work, the theme and style of the album, the availability of materials and time, experience and many other factors. In addition, instead of choosing a specific size, you can create minis of different shapes, for example, round or in the shape of hearts and houses. After all, you see, if you have ideas and imagination, you can play with any size in an interesting and original way.

How to choose a photo album? | Articles | "Photosphere"

Heart-shaped scrapbook blank from Pink Paislee

Each craftswoman will have to choose her favorite size for future creations.

What format did you choose for yourself?

Anna in Articles about scrapbooking, 08/23/2021 at 00:22

§

How to choose a photo album? | Articles | "Photosphere"

Page from scrapbook 30×30 cm Gabrielle Pollaco

Each experienced scrapper has his own approach to work, and of course, he has his own favorite sizes. All sizes have their advantages and disadvantages. Often craftswomen prefer completely non-standard sizes, which allow them to create scrapbooks as conveniently and quickly as possible and use their creativity. Let’s look at the main options.

15×15 cm

This is the smallest of the standard scrapbook sizes. In the Western scrap world it may be recognized as 6×6 inches. In this size you can find a good selection of materials for scrapbooking, in particular albums, blanks and paper sets. For an album of this format, you can cut a sheet of scrapbooking paper 30×30 cm into 4 equal parts, although often it is simply a pity to cut a designer sheet with beautiful patterns.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper set 15×15 cm Olivia from BasicGrey

This format is convenient to use if you have a sufficient number of photographs and memorabilia to devote the entire mini-album to one topic or event. For example, an annual vacation to the sea or a child’s birthday can be an excellent theme for a separate mini-album. A children’s scrapbooking album also looks very advantageous in this size.

Among the disadvantages of the 15×15 cm format, many scrappers cite the relatively small page size, which does not allow placing several large photographs and allowing flights of fancy to unfold. On the other hand, working in such small sizes can become one of the stages of creative development – why not try this task for yourself – fit within the 15×15 size frame and create something really interesting.

One of the important positive aspects of this format is its ease of portability – such a baby will fit into any woman’s handbag.

How to choose a photo album? | Articles | "Photosphere"

Scrapbook size 15×20 cm, work by Melissa Thiesse

20×20 cm

The album format of 20×20 cm has a Western counterpart of 8×8 inches. This is one of the classic album sizes in scrapbooking, a kind of golden mean between the small size of 15×15 cm and the classic large 30×30 cm. In specialized scrapbooking stores you can find many options for paper of this size; most leading manufacturers have not ignored it.

There is an opinion that this format is optimal for pages with photographs measuring 10×15 cm. This is especially true when you have photographs of not the best quality that cannot be printed in a larger format.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper set 20×20 cm Calais from 7gypsies

A photograph can be conveniently placed on one page, and the viewer can easily assess the integrity of the work at one glance. The 20×20 cm format is suitable for those who only need a small amount of decorations, but at the same time it does not limit creativity and makes it possible to place a sufficient amount of decor. For many beginners in scrapbooking, this size may be optimal, since it provides enough space to work, but is not intimidating by the size of the empty space, such as the size 30×30 cm. In general, this is a very convenient format for working, the pages are harmonious and cozy, photographs are not lost in the background, and journaling is conveniently hidden in secrets or under a photograph.

Don’t forget about the practicality of this size, because thanks to the small format, such albums are easy to store and carry.

30×30 cm

This is a classic large size scrapbook. In inches it measures 12×12 inches. Now in the scrap industry this is the most common format of paper and materials for scrapbooking. You can find many options for sets of paper, stickers, die-cuts, blanks and albums from each manufacturer for this size. Of course, such paper will cost a little more than its smaller counterparts, but once you try it in your work, you will be able to appreciate all the advantages.

The square shape of this paper makes it very easy to create balance on the page. Additionally, this size also eliminates the need to trim the paper, which is especially important if you don’t have a trimmer.

How to choose a photo album? | Articles | "Photosphere"

A page from a scrapbook measuring 30×30 cm Gerry van Gent

The 30×30 cm format is especially good to use if you have a lot of photos on hand that you want to use and can’t choose. And for those who are especially creative, there will be room not only for memories in the form of photographs, but also space for decorations and decor. The 30×30 cm format is suitable for those who feel cramped in the small formats 15×15 and 20×20 cm. After all, with the right approach, large pages turn out to be very concise, and nothing interferes with the flight of thought. The finished albums in the classic large square format look very professional and serious; you will definitely want to keep them for many years and will not be ashamed to show them to all your friends and acquaintances.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking paper Decoration 30×30 cm from Melissa Frances

This is an indispensable size if you want to create a truly monumental work, for example, a large family album. Well, for some occasions, for example, a wedding scrapbook, this format seems to be the only right option. After all, you will definitely want to print beautiful professional wedding photographs in a large format, for example 15×21, and they will delight the owners with pleasant memories for a long time.

Although for many beginners in scrapbooking, the 30×30 size may be difficult to master at first, and many scrappers do not work in this format at all. Some craftswomen say that the main problem with 30×30 pages is that there is too much free space and the layout looks empty. And of course, most likely, an album of such a “weighty” format will live in your home, and it will not be so easy to move it for display.

Often, scattered pages “about life” are created in the 30×30 cm format, which tend to be born with or without reason. They gradually accumulate in a drawer, and over time they can make a good album telling the chronological story of the family’s life.

21×30 cm

This is a well-known and widespread A4 format. Some may note that creating scrapbooks in this format is not stylish, but we cannot agree with this. This album size is very convenient. Firstly, with this format you can significantly save on your work budget. In regular hobby stores you can purchase inexpensive colored pastel paper for the base of the pages.

The design paper that will be used for the A4 album will be trimmed, leaving pieces for decoration and backing on other pages. Moreover, this album format can be created in both vertical and horizontal versions, and each of them will look quite original. The practicality of this option cannot be denied, because finished pages in A4 format can be stored in the most ordinary files.

How to choose a photo album? | Articles | "Photosphere"

Scrapbooking album size 15×30 cm from Pink Paislee

For those with more memorabilia than photos, you won’t have to worry about wasted space on the page – there’s only so much space to fill. For scrappers who love to create, but get more pleasure from the result than from the process, or are limited in time, creating such a page is much faster and easier than a whole 30×30. Although the A4 size seems to be a rather “non-scrap” format, many experienced craftswomen, including foreign ones, adhere to this particular format.

Of course, there is no consensus in the world of scrapbooking as to which album format is optimal. In addition, the question remains open as to which shape has more advantages – square or rectangular. Some people don’t stop at just one and prefer to dedicate different albums to different events. In many ways, the choice of size depends on how many and what kind of photographs you plan to use in your work, the theme and style of the album, the availability of materials and time, experience and many other factors. In addition, instead of choosing a specific size, you can create minis of different shapes, for example, round or in the shape of hearts and houses. After all, you see, if you have ideas and imagination, you can play with any size in an interesting and original way.

How to choose a photo album? | Articles | "Photosphere"

Heart-shaped scrapbook blank from Pink Paislee

Each craftswoman will have to choose her favorite size for future creations.

What format did you choose for yourself?

Anna in Articles about scrapbooking, 08/23/2021 at 00:22

Technical dimensions of premium photo books – Moscow

To prepare images for a photo book in Photoshop and other graphic editors, you need to use pre-cut sizes. The table shows the sizes for photo books with a basic number of spreads. If there are more pages, the spine of the book will become wider. In this case, we advise you to calculate the spine size using the formula. The table contains special symbols:

  • n — number of spreads (pages)
  • K – spine

In regular Printbook photo books, the pages are glued into the cover, so the spine will not increase.

Regular photo books Printbook are designed page by page, while Printbook Premium and Printbook ROYAL are designed as entire spreads (1 spread = 2 pages). To find out the dimensions of one page for a Premium or ROYAL book, divide the Length parameter by 2. For example, the pre-trimming size of 400×203 for a Premium photo book for a page book will be 200×203

Formats Additional trim size (mm.) After-cut size (mm.) Spine
(K, mm.) *

DPI
Reversals Covers Reversals Covers
Premium Printbook with hard personal photo cover
15×20 306×203 373×240 300×197 320×203 5.4 0.39*n 300
18×13 365×127 432.6×170 356×127 394.6×132 5.4 0.48*n 300
20×15 400×156 466×193 395×150 413×154 5.4 0.39*n 300
20×20 400×203 464×235 394×197 410×203 5.4 0.39*n 300
20×28 400×270 464×305 394×260 410×265 5.4 0.39*n 300
28×20 570×203 635×243 560×195 580×205 5.4 0.39*n 300
25×25 500×254 565×285 494×247 510×255 5.4 0.39*n 300
30×30 600×305 665×345 594×297 606×304 5.4 0.39*n 300
Premium Printbook with soft personal photo cover
15×10 310×102 334×102 300×102 324×102 7 0.55(n-10) 300
18×13 370×127 394×127 356×127 380×127 7 0.55(n-10) 300
15×20 306×203 321×203 300×197 310×197 0.39*(n 1) 300
20×20 400×203 415×203 390×195 400×195 0.39*(n 1) 300
Premium Tablets
20×20 400×203 464х235 394×197 410×203 5.4 0.39*n 300
20×28 400×270 464×305 394×260 410×265 5.4 0.39*n 300
28×20  570х203 635×243 560×195 580×205 5.4 0.39*n 300

Technical requirements for digital printing

To print photos without losing quality, you need to follow simple and simple rules for preparing a file for printing.

   When preparing a file for printing in a photo center yourself, you need to take into account the format, size and resolution of the image. All manufacturers produce photo paper in certain, standard formats (from A6 to A0) and if the size does not fit into the paper format, then the details of the photo will be lost during printing (we will describe this below).

   In most cases, you print photographs in standard formats (10×15, 13×18, 15×21, 21×30, etc.). Each format corresponds to certain linear dimensions. The sizes of printed photographs in darkrooms and printers are slightly different. Below is a table of standard formats attached to a specific size and pixel size for printing on printers:

Photo format * Linear size (cm) **

File sizes in pixels ***

(for 300 dpi)

9×13 8.9×12.7 1051×1500
10×15 10.2×15.2 1205×1795
13×18 12.7×17.8 1500×2102
15×21 14.9×21 1760×2480
21×30 (A4) 21×29.7 2480×3508
30×42 (A3) 29.7×42 3508×4960
33×48 (A3) 33×48 3898×5669


* Photo format
– linear file size rounded and converted to centimeters.


 **
Linear size of photo
– width and height of the image in centimeters and millimeters. This parameter can be found out simply by measuring the printed photograph with a ruler.


***
Size in pixels
* – width and height in pixels of the digital image.


    *Pixels are the points that make up a digital image. The more points, the more details we can see.

    Image resolution (dpi)
– a number that relates the size in pixels and the linear size of the image. This photograph parameter is measured in dots (pixels) per inch (inch = 25.4 mm) – dpi (



dots per inch)
. The minimum resolution that is acceptable for printing photographs of acceptable quality is 150 dpi.

  The recommended resolution for high-quality photographs is 300 dpi.

Important to know!

    When printing a low resolution image in a large format, a blurred or pixelated effect will be noticeable. Such prints will not be of high quality. When you print photos from a mobile phone, the images may be of lower quality than when you print from a digital camera. Artificially enlarging or zooming in on an image can also lead to a loss in photo quality.

   Now let’s look at the discrepancy between the file size and the photo format. If you print a photo with the file automatically (in the printer program) adjusted to a standard format, the details of the photo along the edges will be lost, or white margins will be left on the image on two edges.

EXAMPLES:

<img src="https://i.idfoto.ru/u/pic/ff/d4e2b0c7fe11e3a4796601b5853424/-/2.jpg” alt=””>

photo printing with photo cropping at top and bottom

black frame – print area,
red – photo borders

<img src="https://i.idfoto.ru/u/pic/f5/24680ec7fe11e3a4796601b5853424/-/1.jpg” alt=””>

printing a photo with margins and saving the entire image

black frame – print area, red – photo border