Cutting quality requirements and inspection methods

1 topic content
This standard specifies the quality requirements and test methods for book cutting, book blocks and finished products.
2 Reference standards
GB 9851 Printing Technology Terms
GB 7887 books and magazines and format size
Category 3
3.1 single knife cutting;
3.2 Three-sided knife cutting.
4 Quality requirements
4.1 Book cutting open size.
4.1.1 Meet the requirements of GB 788.
4.1.2 The size of the non-standard open source is agreed upon by the demarcation unit and the printing unit.
4.2 Cutting requirements for semi-finished products.
4.2.1 The size error of cutting sheets and various regular drawings and loose sheets is less than 2mm.
4.2.2 Crop charts: The text size of the books prevail, with an error margin of 2.5 mm, with the exception of hypertext folding.
4.2.3 Trim cover: The head and foot errors are less than 3 mm, and the back and front quad errors are less than 2 mm.
4.3.4 cutting double: error 3 mm, breaking area less than 6 mm2.
4.2.5 Cutting hardcover bookcase cardboard, medium diameter paperboard: subject to the book size and shape requirements, the error is less than 1 millimeter
Meter.
4.3 Cutting Requirements for Finished Products
4.3.1 Finished books and periodicals: Paperback errors are less than 2mm and hardcover errors are less than 1.5mm.
4.3.2 After the cutting, the books and magazines have no obvious skewness, knife and knife marks, and no severe breakage.
5 test methods
5.1 Measurement
Press and Publication Administration of the People's Republic of China 1991-07-01 Approved 1991-10-01 Implementation
Use a millimeter to check the product size.
5.2 Visual Measurement
The professional and technical personnel visually inspect and inspect the product quality according to the standard requirements.