What is a mask file?
How to Setup Mask Files
If your project includes foil stamping, spot UV, embossing, or die cutting you will need to provide a mask file (per finish) alongside your design files.
Create a black and white pdf file where all black areas have a color value of
K = 100% (C=0 M=0 Y=0 K=100)
Black areas represent where you want the finish to be located and white means no finish will be applied.
If your project contains more than one finish, you must provide separate mask files for each finish.
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