Stack of pressure sensitive adhesive coated sheets

A stack of aligned sheets, each of which sheets includes

• a backing having a plurality of edges providing a peripheral edge for the sheet, and upper and lower surfaces,
• a coating of pressure sensitive adhesive on said lower surface by which the sheet is adhered to the sheet beneath it in the stack, said coating extending along and within at least 12.5 mm of all of said edges,
• release means providing a first adhesion zone between adjacent sheets in the stack and adjacent one of said edges for providing a sufficiently low release force between said adhesive coating and the upper surface of the adjacent sheet in the stack to afford, when the sheet is the uppermost or lowermost sheet in the stack, easy initiation of peeling of the sheet from the adjacent sheet in the stack along the first adhesion zone, and
• attachment means providing a second adhesion zone between adjacent sheets in the stack for providing a sufficiently high release force that is higher than said low release force in the first adhesion zone to firmly adhere adjacent sheets in the stack together and thereby hold the stack of sheets together during handling, while affording continued peeling away of the sheet in the stack after initiating of such peeling along the first adhesion zone.