Bookbinding, not only to take care of the durability, but also to consider the quality and color of the line and the coordination of books. The line has the silk thread, the cotton thread and the thickness, and the selection of the line should also be determined according to the specific circumstances of the book. The previous line line, will end the vertebral eye, face down, back towards it, according to the book the length thickness, line is good. In general, a book can be booked with a line six times longer than a book.
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