Our custom clear sticker label printing services in NYC use clear polypropylene for print jobs. These custom clear sticker labels are resistant to both water and oils. Roll Labels are great for packaging, bottles, or for branding. Clear polypropylene roll labels have a permanent adhesive and stick to a variety of surfaces. Please note: All clear square and rectangular roll labels come with 1/8″ rounded corners. What is a white ink mask? A white ink mask is an additional ink color added to your design. This can be used simply as a white color in your design or can be used to make your colors appear more sharp and solid. Anything printed without a mask will have a transparent look.  Use vector paths/shapes to create black color areas that will indicate where the white ink base will go. The rest of the areas will show the clear material.