Patent ID: 7770933

Claim:
A printing paper comprising: a sheet having a first surface and a second surface; an adhesive layer formed on the second surface; a release paper attached to the adhesive layer; a plurality of boundary lines that divide the sheet into a plurality of page regions, the plurality of boundary lines including a plurality of first folding direction boundary lines and a plurality of second folding direction boundary lines, each of the plurality of page regions having a first partial surface that forms part of the first surface of the sheet and a second partial surface that forms part of the second surface of the sheet, the first partial surface being capable of having an image printed thereon, the release paper having a plurality of release-assist formation lines created by forming a plurality of slits in the release paper such that each of the plurality of release-assist formation lines contacts one of the plurality of first folding direction boundary lines, wherein: when folding along one of the plurality of first folding direction boundary lines, the first partial surfaces of adjacent page regions are brought closer together and when folding along one of the plurality of second folding direction boundary lines, the second partial surfaces of adjacent page regions are brought closer together, when folding along the first folding direction boundary line, at least one tab portion of the release paper formed as a result of the formation of the release-assist formation line detaches from the adhesive layer and extends outward from the second surface of the sheet, the at least one tab portion enables removal of the release paper, the at least one tab portion when detached from the adhesive layer enables removal of the release paper from the second partial surfaces of adjacent page regions such that the second partial surfaces are capable of being adhered together when folding along the second folding direction boundary line, and the first folding direction boundary line is a perforated line having portions thereof that are penetrated through a depth of the printing paper, pulling of the tab portion enables peeling off adjacent page regions, between the release-assist formation lines that contact the first folding direction boundary lines, the adhesive layer on the second surface of the first page and last page are, after pulling of the tab portion, adhered to a booklet cover, a process of folding along the boundary lines for creating a booklet makes the tab portion detach from the adhesive layer, and a portion of the release paper formed on the back surfaces of two adjacent page regions is bounded by two first folding direction boundary lines that each contact a release-assist formation line, so that folding the printing paper along the two first folding direction boundary lines enables the portion of the release paper form on the back of the surfaces of the two adjacent page regions to be peeled without peeling any other portion of the release paper.