Does my file need to have a white ink underprint?


Have you chosen one of the materials below? Then it is likely that your file requires a white ink underprint in the file.

  • Paper Silver
  • Paper Gold
  • Paper: Fluorescent Orange or Yellow
  • PP and PET Silver
  • PET Clear/Transparent

 

Do you want your gold or silver paper label to give a metallic effect to your design? Then you can choose to not add a white ink underprint.


Have you chosen to print with fluorescent yellow or orange material? It is recommended to add a white ink underprint to your file otherwise the colors will greatly differ from the original colors in your design. 


Have you chosen the transparent material option? If you prefer your file to have transparent colors, then a white ink underprint isn’t recommended. Should you prefer the colors in your file to have a layer of opacity, then adding a white ink underprint is highly advised.  



How to add a white ink underprint:

  • Create a new spot color:
    • Choose Window > Samples.
    • Choose = (top right) > New sample.
    • Change the name of the switch to “white_ink” (lowercase).
    • Change color type to spot color.
    • Change CMYK to C0, M0, Y0, K0.
    • Press OK.


  • Place an extra element with white ink on top of the text/shape/image that should not be transparent.
  • Always set the area with white ink on overprint
  • However, do not overprint the text/form/image itself. You can find this under Window > Attributes > Overprint fill



How to check the white ink underprint on a file:

  • Open Adobe Acrobat
  • Go to the right menu and click on " Print Production". Click on "Output Preview". 
  • In the "Output Preview", you can see all the colors that are in the file. 
  • Deselect all the colors except the color white ink. 
  • When viewing the file, contrary to expectations, everything that is in black contains the white ink underlay. And everything that is white does not contain white ink.