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Grayscale images that are converted to CMYK will have a color shift in the final print. That shift may be green or yellow.

Always check the CMYK values of your grayscale in the final CMYK document. If there are other values other than K in your grayscale image, there is a chance that the color will vary.

To eliminate all values other than K, use your Channel Mixer (adjustment layer) in Photoshop, then click "Monochrome" and adjust accordingly.

When exporting from any program such as Indesign or Illustrator, use these settings to make sure your PDF files export correctly.

Export settings for PDF files

Adobe PDF Preset is set to Press Quality

Compatibility is set to Acrobat 4 (PDF 1.3)

Compress Text and Line Art is set to Off

When using blue in your design, always make sure to leave at least a 30% difference in your Cyan and Magenta values.

100% C 100% M 0% Y 0% K

Blue is close to purple in the CMYK spectrum. Remember, use a low amount of magenta whenever using high amounts of cyan to avoid purple.

Example: C-100 M-70 Y-0 k-0

Your artwork files should be at 300 dpi.

Your designs should always start and finish in CMYK color mode.

We recommend saving as a PDF file. You may also send the file in the following types: JPG, JPEG, TIF, TIFF, and EPS.

We prefer that you send PDF with embedded or outlined fonts. PDF files are easier to handle and will likely speed up your turn-around. Remember to flatten your files before uploading.

For Roll Labels, we recommend designing:

• Vector files (e.g. EPS or PDF)
• 300 DPI or higher
• Use black (100% K)
• For fine lines and text smaller than 9pt, use black (100% K) only