Quality control of each process of the hottest pri

The quality control of each process of printing

undertakes the printing of books and periodicals, commodity packaging and decoration, and trademark bar codes. It is required that employees from the production department, design room to the plate making offset printing workshop should devote themselves to learning the relevant knowledge of bar codes and understand the national standards of bar codes. They should consider:

1 bar codes meet the requirements of scanning and reading

2 printing process requirements

3 requirements for the design intention of books, periodicals and trademarks

strictly control the entry of raw and auxiliary materials, and unqualified paper and ink shall not enter the factory and be warehoused. Give the quality inspection personnel certain power, assign special personnel to be responsible for the barcode printing quality, improve the rules and regulations of each printing process, and immediately send the barcode printing products to the technical supervision and standard measurement departments for inspection

customers from the technical supervision and standard measurement departments, otherwise they will damage the negative or positive bar code film brought by the fixture. When photographing the plate making copy, they should master the correct exposure time and development time, which constitute an innovation system in line with the development characteristics of China's new material industry. In particular, the exposure should not be excessive. The bar code film that comes out of excessive exposure is weak, swollen and has errors. For the original film of bar code symbols with standard size, the allowable error value of bar width is 0.005 mm, and the allowable error value of bar code characters is 10.013 mm. Printing enterprises cannot arbitrarily enlarge and reduce the original film of bar code. Some trademarks and bar codes in the cover of books and periodicals of the publishing house should not be copied, but can be directly spliced into the cover of books and periodicals with the original film of bar code. Trademark decoration products should not be photographed or copied as much as possible, but directly spliced in, It can reduce the error in the copy process and ensure the accuracy of barcode. If you need to copy the trademark, you should master the correct exposure and development time after using computer technology

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