It is a special product with Double Sided Adhesive Peel / Stick adhesive used to secure the plate to the Printing Cylinder or Acetate. It does not leave any adhesive residue on the cylinder, plate or acetate during disassembly. It does not curl or cause air bubble problems during assembly thanks to its wavy or embossed protector. It is easy to expose. It is available in PVC, Fabric and Foam versions suitable for different plate thicknesses.