"Seven-five products" is a category used by Confucius Old Books Network to measure the newness of books. The specific provisions are as follows:
Ordinary books:
Seven-five products: meet the requirements of eight products, but the problem items can be slightly heavier. 8. Finished product phase: intact as a whole. Items 1-4 (front cover, back cover, inner page and copyright page) are all intact, items 5-6 (illustration page and title page) may be missing individually, and items 7-1 (spine, shape, edge and corner) may be slightly problematic, but not exceeding 5%. There are no common problems in 1-6 (incomplete matching, adhesion, water stains, deformation, moth-eaten, and repair), and there are some problems in 7-1 (ink marks, stains, signatures, and wear), but they do not exceed 5%. Except the front cover and back cover are worn or slightly creased, and the corner of the book is slightly wrinkled, the book can't be damaged. Books with certain fluidity.
Thread-bound book:
Seven or five products meet the requirements of eight products, but the problem items are slightly heavier. Eight finished products are well preserved. There are no problems in items 1-4 (residual copy 1, missing pages 2, adhesion 3, deformation 4) of book appearance. Items 5-12 (moth-eaten 5, repair and reassembly 6, water stain 7, ink mark 8, stain 9, signature 1, wear 11, mildew and weathering 12) may exist slightly, but they do not exceed 5% of the total area of the book, and will not affect the text reading and the overall beauty of the book.