Hardcover means that the book block is first pasted and pasted by the threading machine in series, and then the rubber ridge is cut. After flattening, ridging, pasting gauze and pasting Dutou cloth, there is a bookbinding method in which the backing paper is bonded to the leather case, which can be divided into square ridge hardcover, round ridge hardcover, soft hardcover (false Hardcover) and string ring hardcover.

精装书较之平装书高档而考究，外观上主要的区别在于，书的前后多了硬硬的书壳，材料成本和装订成本都相应增加，适合图书的装订。

Compared with paperback books, hardcover books are high-grade and exquisite. The main difference in appearance is that there are more hard cases in the front and back of the book, and the material cost and binding cost increase accordingly, which is suitable for book binding.

精装书的硬壳是由面料包裹灰板而做成的，灰板的厚度是从1mm—3.5mm不等，可根据需要选择不同的厚度。精装书面料有多种多样。普通的是用纸张作壳面，可选用128g到200g的铜版纸，单面印刷和覆膜。面料为书籍装祯纸时，不需要过油、过胶，直接做壳。书壳面料还可以是人造革、布料、锦缎、PVC等。

The hard shell of the hardcover book is made by wrapping the gray board with fabric. The thickness of the gray board ranges from 1mm to 3.5mm. Different thicknesses can be selected according to needs. There are many kinds of fabrics for hardcover books. Generally, paper is used as the shell surface, and 128G to 200g coated paper can be selected for single-sided printing and coating. When the material is book frame paper, it does not need to be oiled or glued, and the shell is made directly. The book case fabric can also be artificial leather, cloth, brocade, PVC, etc.

面料上的工艺异彩纷呈，如局部UV：磨砂UV、七彩UV、加厚UV等；烫电化铝：烫金、烫银、烫彩金，烫黑，热压，起凸，压凹等。

The process on the fabric is colorful, such as local UV: frosted UV, colorful UV, thickened UV, etc; Ironing anodized aluminum: bronzing, silver ironing, color gold ironing, black ironing, hot pressing, convex pressing, concave pressing, etc.

精装书还有如滚金口、套护封、收缩包装等工艺。

Hardcover books also have techniques such as rolling gold mouth, covering and sealing, shrink packaging and so on.

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