Patent ID: 7377996

Claim:
A card sheet comprising: a top material layer having a front side and a back side a brittle, starch composition layer on the back side; the starch composition layer having a thickness greater than 10 μm; the top material layer including a starch diffusion region extending from the back side and the starch composition layer part way to the front side; die outlines in the top material layer engaging the front side and extending into the starch diffusion region and spaced from the starch composition layer by a portion of the starch diffusion region; the die cut lines defining a plurality of sub-sheets; the front side being printable by a printer or copier; and the card sheet having elongation-at-break and stress-at-break properties such that after the card sheet has been passed through the printer or copier and a printing operation conducted on the front side, the card sheet with only a single forward fold cleanly snap breaks the starch composition layer and the starch diffusion region portion along one of the die cut lines.