File preparation rules
Materials shall be prepared according the following requirements:
- Files shall be prepared in PDF form (versions: from 1.4 to 1.6), using the Press quality settings.
- Then converting the images and objects to CMYK colour system, ICC profile shall be used corresponding to the used type of paper (According Table No. 1).
- The image resolution (not less than): Coldset 170 dpi, Heatset 300 dpi.
- PDF files may not contain RGB, SPOT objects.
- The submitted PDF file shall be in original size.
- The Pages shall be centred in PDF file.
- PDF file shall include all the used fonts.
- PDF file shall not include the colour ICC profile.
- In case of different colourful object coating it shall be observed that the object of the darker colour shall cover the edge of the lighter object for 0.1 – 0.4 mm (Trapping).
- In the products provided for post-treatment shall be used the crop marks and bleeds for not less than 3 mm. The texts and important objects shall not be closed than 4 mm to the cropping.
- The settings of the customer overprint for all the colours are maintains as well as there is performed the forced overprint Black setting for 100% Black objects.
- If overprint or trapping has particular requirements, the Customer shall obligatory inform the Customer about it before the order submission.
- The file names within one issue shall be with similar structure in order to provide the automatic workflow:
File name / underline / page number / dot / pdf
For example: Izklaide#21_05.pdf - Multiple consecutive pages can be included in a single file, with the total file size not exceeding 500 MB.
- In case of discovered faults, the new file shall be submitted by the changed name.
For example: Izklaide#21_05New.pdf - Cover files shall be submitted in the combined form (cover 4 with cover 1, cover 2 with cover 3) or in a split form – cover 1, 2, 3 and 4 – each separately.
- If the publication is partially in color, the color page title must include the indication “CMYK”.
For example: Izklaide#21_05CMYK.pdf
| Parameter | Coldset (Newspapers) | Heatset (Magazines, Catalogues) |
|---|---|---|
| CMYK ICC profile | ISOnewspaper26v4.icc – newspaper (NP) and improved newspaper (INP) | |
| ISOcoated_v2_300_eci.icc – HWC, MWC, LWC, WFC papers | ||
| SC_paper_eci.icc – SC, MF, LWU, MFC, INP papers | ||
| PSOuncoated_v3_FOGRA52.icc – WBU, SBU papers | ||
| Coloured or white reading matter on coloured background | Not less than 10 dots | Not less than 6 dots |
| Total ink amount | 240% – newspaper (NP) and improved newspaper (INP) | 270% – INP, MF, SC, LWU papers |
| 300% – LWC, MWC, WFC, MFC, MFU papers | ||
| 300% – HWC paper for covers | ||
| Screening of large colour areas | 95% – newspaper (NP) and improved newspaper (INP) | 98% – INP, MF, SC, LWU papers |

If necessary, Poligrāfijas grupa Mukusala can provide technical advice on preparation of PDF files. First two advisory sessions are free of charge.
Additional Recommendations for Layout Designers Preparing Files for Magazines with Perfect Binding.
