2. Paperback is not so particular, ordinary printing paper, ordinary printing technology.
Because of the different materials used, the prices of hardcover books and paperback books will be very different. If you want to collect, it is recommended to choose hardcover, but how to read it generally, paperback is more cost-effective.
Extended data:
The biggest advantage of hardcover books is that they are firmly sealed, which plays a role in protecting the inner pages and makes the books durable. Like the paperback, the inner pages of hardcover books are mostly stitched, and a strip of cloth should be pasted at the spine to strengthen the connection and protection.
Several common forms of hardcover books:
First, according to the form of spine, there are two kinds of square spine and round spine.
1, the square spine is thicker than the block. Due to the folding of the book block and the stringing of books, the height of the spine is higher than that of the book block, and the more sheets are printed, the more obvious it is. Therefore, the hardcover book with square spine should not be too thick, and the spine is generally less than 20 mm
2. Circular spine. Because the positions of the front and back booklets are slightly different, the folded part of the booklets is slightly semicircular, distributed on an arc surface, and the thickness is balanced. The turnover of the book block is concave, which is suitable for the convex circle of the spine.
Therefore, it is best to use a round spine for thicker books. A book with a round spine has a round back. Generally, the thickness of the book block is 130 between the chord and the arc.
Round ridges can be divided into two types: round back without ridges (only round back without ridges) and round back with ridges (round back with ridges, the height of which is generally the same as the thickness of book cover paperboard).
Second, according to the material, it can be divided into two kinds: the same material on the ridge surface and the different material on the ridge surface.
1, spine material is the same, that is, spine and back cover material are the same. There are square ridges and round ridges. Hardcover fabrics are mostly paper, cloth, lacquered paper and lacquered cloth. , usually equipped with a protective seal.
However, there is a kind of book title, pattern and so on. Printed on the whole paper and pasted on the cardboard. Most of these books have square ridges and no protective seals.
2. The spine is made of different materials, that is, the spine and the cover are made of different materials. Cloth is usually used as the spine of the book, and paper is pasted on the cardboard as the cover. This form is generally a round ridge unprotected seal.
A good hardcover book is not obtained by accident. In the production process, the quality of each process needs to be strictly controlled until the product quality of the last process is completely qualified.
Due to some different technologies, paperbacks can be divided into the following categories:
(1) Binding paperback books with wire: the process of binding paperback books with metal wire.
Printing of semi-finished products begins: bumping pages → cutting materials → folding → covering, inserting and sticking pages → waxing → matching pages → bumping books, binding and backing → drying → binding → semi-finished product inspection → gluing → package cover → ironing and drying → cutting books → finished product inspection → packaging and labeling.
(2) Sewing paperback books: Sewing is a method of binding books into volumes with an industrial sewing machine with a structure similar to that of a household sewing machine. Sewing can be done on the plane or at once. The maximum needle pitch is10mm, and the minimum needle pitch is1.5mm. ..
(3) Binding paperback: Binding is a new binding technology with the appearance of synthetic adhesive. China used it in the 1960s, and it has been widely used ever since. Binding uses cold glue and hot melt glue.
(4) Sewing paperback: This is a high-grade binding method, which is mostly used for books with high reading frequency and thick books.
It is characterized in that the binding thread passes through the folds of the book signatures, then all the book signatures of a book are locked together with the thread, and the back of the book is glued, covered, ironed, dried and cut on three sides, thus completing all the binding work of a book.
References:
Baidu Encyclopedia-Hardcover Book Baidu Encyclopedia-Paperback Book