What are loopers and dead loops?

Answer: Loose sleeve and dead sleeve refer to the form of hardcover sleeve processing. The loose cover is also called the flexible cover, that is, after the book is processed into a book, the book block and the book cover can be separated or exchanged at will. This form is convenient to use and is suitable for the processing and finishing of the diary book or some reference books. The dead sleeve refers to the ring liner of the book block is firmly adhered to the book cover during the sleeve processing. This is a common form of sleeve processing, which is suitable for the processing of all hardcover books.

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