Stretch (Elongation] / Cobb

Stretch is the amount of distortion which paper undergoes under tensile stress. Stretchlelongation is usually expressed, as percent stretch to rupture. Stretch can be related to the papers ability to conform and maintain conformance to a particular contour, e.g. Copier paper, rnuiticolor offset printing papers, liquids packing cartons base papers etc. It is important in such grades as twisting papers, cable wrappers, corrugating papers and other similar grades that are folded or subjected to stress during use. Stretch is higher in cross direction than machine direction.