Digital File Preparation Tips Pt. 2: Prepping CMYK Files for Digital Screen Press Output

In this, the second part of our two part series on digital file preparation, I will focus on the proper set up for CMYK files for output on our digital screen press devices (Durst Rho digital screen presses). This information is very similar to our previous post on preparing files for RGB output. The differences are subtle, but very important. Make sure that you are setting up your files for the proper output device or the final product will be less than satisfactory.

Image Preparation: Images should be saved as CMYK TIFF or EPS files at 100 - 150 dpi final size. For example, if a 10x10 InDesign document needs to be output at 400%, the placed image file needs to be 40x40 at 100 dpi or equivalent.

Program Support: InDesign up to CS4, Illustrator up to CS4, and Photoshop up to CS4.

Filename Extension: Ensure filenames are properly updated in all layouts. Please include appropriate extensions (for example, filename.eps).

Layout Accuracy: Provide one accurate and fully updated color copy of each layout for proofing and placement checking purposes. If discrepancies exist between hard copy and supplied digital files, indicate and initial changes.

Color Matching: Include Pantone® numbers or their equivalents for all solid colors. For continuous tone images, provide a hard copy or a sample that is color accurate.

Bleed: Include .25” bleed on all jobs that require mounting or die cutting.

Fonts: Always supply all font suitcases, including both screen and printer fonts. Whenever possible, convert type to outlines.

PC Files: Please follow these guidelines for file creation on a PC:

• Illustrator - convert text to outlines and save as an EPS file 
  
• Photoshop - render text, do not use text layer files, and include all elements associated with the file (for example, vector graphics and image files)

InDesign: When creating layouts in InDesign, the maximum document width is 216”, making it easier and more accurate to create large layouts at 100% size.

Illustrator: When creating layouts in Illustrator, use a minimum document size of 25% of the final size. Include all linked images. Save files as AI format. Convert strokes to outlined paths on all vector artwork and text. Important - convert all fonts to outline.

Logos: For best results, supply all logos as VECTOR files from Illustrator, not as raster files such as PhotoShop EPS, JPEG, GIF, or TIFF.

If you have any questions regarding digital file preparation (or anything else) shoot me an email at marty@graphicsystems.com or leave a comment below. I will get back to you ASAP.