Ulano Sta-Sharp S3S Film is a lacquer-based, water-resistant knife-cut stencil film for making screens. It adheres to the mesh with Sta-Sharp Adhering Liquid and is for use with all inks except lacquer, vinyl and plastisol. Knifecut films won't shrink or expand because of the backing sheet and once adhered to the mesh it comes off quickly, in one piece. Sta-Sharp S3S is a fast cutting, fast peeling, green colored film on .003" polyester backing. S3S StaSharp adheres fast, has excellent stick-back qualities for easy corrections. Easy to see through and when you lay it down and it stays flat for perfect contact.