| 摘要 |
PROBLEM TO BE SOLVED: To provide a new model book for sheets to be easily recycled without interrupting a photograph or the like bridging over two-page and spreading flatly at a folding part of a center. SOLUTION: One easily openable book is formed by using doubling sheet (four pages) as a unit sheet by adopting sheets for constituting a text of the book, executing an emulsion glue at an adjacent part of an outside of the folding line, executing two folding streaks at both sides of a centerline on one cover, further executing two rows of emulsion glues adjacent to the outsides of the streaks, and adhering the cover to the test of the one book.
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