How to attach perfect files

This section explains how to send us the documents to be printed in the correct manner.
Before attaching your files, follow these simple steps in order to optimise the print quality and check your work.
By following the instructions you will be sure to achieve the greatest potential of offset printing.

Prepress Checklist Alwais perfect files

  • The file format corresponds to the real print format, all the pages have a margin of at least 3 mm, all the important elements are at least 5mm (10 mm) away from the cutting line in metal point brochures
  • The file is generated using an application we accept or provided in .pdf
  • Only the files required for the completed order are provided
  • All colours are in CMYK
  • Pantone colours and Spot Paints are generated on a separate channel
  • The sum of the percentages of colour must not exceed 275% (e.g. 68-68-68-68)
  • Black always has the same composition in all parts of the file
  • Deep black is set in CMYK (40-40-40-100)
  • All images are in CMYK, and saved in Tiff or Eps format
  • The images are acquired and provided in 300 Dpi in the printing format
  • The images for large format prints are 150 Dpi minimum
  • All the alpha channels are removed and the supplied images are on one level (flattened)
  • Tiff and Eps are saved without compression (e.g. Jpg)
  • All linked images are supplied with the file or incorporated
  • In QuarkXpress the image boxes must not have "no" fill as a background
  • All the fonts used are supplied with the file
  • Fonts not supplied are transformed into curves
  • Lines and frames of a width lower than 0.25 points on a white background and 0.4 points if by perforation
  • Black is by overprint. White is by perforation
  • Only 100% black has been used for text (0-0-0-100)
  • Folds, holes, crease lines and die cuts have been verified
  • The master layouts have been realised in Eps
  • A mock-up or blue print copy has been realised and verified

How do I make good quality files?!

The table below gives a reference of dimensions (in pixels) for making images and files good for printing:

Format Good quality Best quality
8.5x5.5cm 502x325px 1004x650px
10x15cm 591x886px 1182x1772px
15x21cm 886x1240px 1772x2480px
21x29.7cm 1240x1754px 2480x3508px
32x44cm 1890x2598px 3780x5197px
64x88cm 3780x5197px 7559x10394px

Get the best out of black!

Important Very often the black in your images has different percentages from the black used in your design.

You will not notice this difference on your screen.

For this reason always control the four-colour values of the black colours before printing in order to avoid problems like this:

  • Always check that the black set in the file is a black formed in four-colour mode, with 100% black and 40% of the other colours.

Cyan Magenta Yellow Black
Dark gray 0% 0% 0% 100%
Black 40% 40% 40% 100%

Always convert your images into cmyk

Before sending the images to typography, whether links inside page layouts or other, always remember to convert them into cmyk.

Images printed directly in rgb without conversion will be faded, as in this example

This window refers to a desktop background downloaded from the internet having the dimension 1280x1024 pixel (45.6x36.12 cm) at a resolution of 72 dpi.
Images in internet require this resolution for optimal display. However 72 dpi are inadequate for printing so the image must be resampled.

In order to transform the image from 72 to 300 dpi, with the Resample imagee flag deactivated, set resolution to 300 pixel/inch and you will obtain the maximum dimensions with which your image can be printed, that is 10.84 x 8.67 cm.
After this operation you can check that the size of the image is still the same (in the example 3.75 MB)..