Postpress Technology 1000 (805-822)

805. What are the operating requirements for hardcover book block adhesive plugs?
Answer: (1) The location of the plugging cloth should be accurate, and the line edge should be properly exposed outside the incision at the upper and lower ends of the book; (2) The good plugging cloth should not be skewed and firm and not bent; (3) The length of the plug cloth It should be consistent with the book back width or arc length and the tolerance is ±1mm.

806. What is the function of the hardcover bookbinding gauze and book backing paper?
A: Sticky gauze is used to make the back cover of the hardcover book firmly attached to the cover. The backing paper of the sticky book is for the back of the book to be firm so that it is not easily deformed when it is read.
807. What should be the specifications of the hardcover book core book back gauze?
A: The length of the book back gauze should be 20mm less than the length of the book block, and the top should be the plug edge; the width should be 40-50mm longer than the back of the book (round back) or the back of the book (square back).

808. Which kind of paper should be used for hardcover book core backing paper? How much should the specification be?
A: The back of the book should be made of high-strength kraft paper with certain toughness and tensile strength (usually about 100 g/m2) or crepe paper with elasticity. The length of the back of the book should be 4 to 6mm less than the length of the book block, and the width should be the length of the back of the book or the width of the back of the book.

809. What is the effect of the third glue coating on the hardcover book core book?
Answer: The third time the book back adhesive is used to paste the back of the book and the back of the book (glue).

810. What are the operating requirements for the third coating of hardcover books?
Answer: (1) The correct choice of adhesives should not use plant-based adhesive materials; (2) The viscosity of the adhesive is appropriate, to be able to stick the gauze and the back of the book; (3) The glue should be accurate, not overflow Book back and incision, and apply evenly.

811. What are the operating requirements for hardcover bookbinding?
Answer: (1) The paste position is accurate, the sticky is not skewed and twisted, and the stickiness is smooth without wrinkles; (2) The width of both sides of the book back gauze after sticking is the same, and the adhesive can not fall off the cloth.

812. What are the operating requirements for hardcover book-bound book backing paper?
Answer: (1) The back of the book is used correctly, the sticking position is accurate, the stickiness is not skewed, and the stickiness is not wrinkled; (2) The same holds up and down, and the sticking does not fall.

813. What is the function of hardcover book core adhesive lining?
A: The adhesive liner is used to stiffen the liner so that it can be inserted into the pocket of the looper and become a hardcover book.

814. Hardcover lining hard lining which materials? What are the specifications?
A: The hard lining is usually a single-sided gray cardboard, the general quantitative in 250g/m2; hard lining specifications in two ways: one is the length and book block the same or less 3 ~ 4mm, width less than the book block width 3 ~ 5mm; The other is the same length as the book block or 3 to 4 mm in length; the width is half the width of the book block.

815. What are the operating requirements for hardcover bookbinding linings?
Answer: (1) Adhesives for viscous linings should be selected correctly so that the hard linings can be firmly bonded; (2) The viscosities of the hard linings are 3 to 5 mm, sticking to the lining of the book block ring, and 3 mm must be left. Left and right slits to read; (3) spread evenly, thick and not overflow, thin and not spend; (4) hard lining to stick is not skewed, sticky flat no wrinkles, stick firmly without liner.

816. What is the combined structure of the hardcover bookcase?
Answer: The inner layer of the hardcover book shell combination structure is the bookcase shell cardboard, middle diameter cardboard or middle diameter paper, and the surface layer is a soft material.

817. What are the commonly used hardcover covers?
Answer: The commonly used hardcover book cover soft cover material is PVC coating paper, fabric, leather, coated paper and some paint coating. The most used amount is PVC coated paper.

818. hardcover book shell commonly used cardboard which?
Answer: The commonly used cardboard for hardcover bookcases is gray-white board (CY/T), with thicknesses of 1.5mm, 2.0mm, and 2.5mm, and a small portion of 3mm.

819. Hardcover book shell used in the medium diameter cardboard which several?
Answer: The type and specification of the medium-diameter board used to make the back ridges is the same as that of the bookcase board; the grey paperboard with a ration of 250 to 350g/m2 can be used for the round back.

820. Hardcover bookcase which production methods?
Answer: There are two methods for hand-made shells and machine shells in hardcover shells.

821. What is the procedure for manually pasting book shells?
Answer: Calculate the size and specification of each material of the book cover → open material → adhesive adhesive → group shell → cover angle → flattening → dry naturally.

822. What kind of adhesive should be used for pasting book shells? why?
Answer: The paste shell should use less water, fast drying, high viscosity, well-shaped animal glue or synthetic resin adhesive with the same properties. Due to the rough surface of the board and strong penetrating ability, it is not suitable to use cold adhesives with slow drying and large moisture. The slow drying adhesives will make the moisture more permeable in the cardboard, and the cardboard will have a strong pulling force after absorbing moisture and drying. Make the book shell upwardly warped and deformed.

- "Printing Technology - Publishing Commercial Printing"