With Clear Window Clings, you have the option to use white ink as an overprint so your printed graphic can be opaque in some areas and transparent in others. This will allow for vibrant, crisp color. Similar to Spot UV masks, White Mask files are separate from your artwork files and black color indicates where the white ink will print. Make sure to create your mask file the same size as your color art file. This will prevent alignment issues during printing. Note: White Masks must be made in vector format and be saved as EPS or PDF and use 100% K. Use vector paths/shapes to create black color areas that will indicate where the white ink base will go. The rest of the area will represent the Clear Window Cling stock. Black in the White Mask file indicates where white ink will be printed. Remember the following when creating a white mask for your white ink base: White ink base will be printed behind any color that’s in your Artwork Layer.