What are the forms of hardcover books
(1) According to the form of spine, there are two types: square spine and round spine.
1. The thickness of the square spine is thicker than that of the book block. Due to the folding and locking of the book block, the height of the spine is higher than the book block, and the more printed sheets, the more obvious. Therefore, hardcover books with square spine should not be too thick, generally suitable for spine within 20mm.
2. The round spine, due to the slightly different positions of the front and back signatures, the folding points of the signatures are slightly semi-circular, distributed on an arc surface, and their thickness is balanced. The book block and the opening are adapted to the convex round of the spine, which is concave round. Therefore, a round spine is better for thicker books. A book with a round spine is formed into an arc after being rounded, and the thickness of the book block is generally 130 degrees opposite to the arc. Round ridges can be divided into round back without ridges and round backs with ridges.
(2) According to the materials used, it can be divided into two types: the same material on the ridge surface and the different material on the ridge surface.
1. The spine is made of the same material, that is, the spine and the front cover and back cover are made of the same material. There are two types of square ridges and round ridges. Hardcover fabrics use paper, fabric, varnished paper, varnished cloth, etc., and are generally equipped with a protective seal. However, there is also a form in which the book name, pattern, etc. are printed on the entire paper surface and laminated on the cardboard. Most of this book has a square spine and does not have a protective seal. The choice of cover material for hardcover books is also very important. 2. The spine is made of different materials, that is, the spine and the cover are made of different materials, usually fabrics are used as the spine, and paper is pasted on the cardboard as the cover. This form is generally round spine without protective seal.