Four elements and testing methods for quality cont

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Four elements and testing methods of print quality control

print quality refers to the comprehensive effect of various appearance characteristics of print. From the perspective of reproduction technology, the printing quality should be based on the faithful reproduction of the original. Whether in the traditional printing process or in the digital process, the printed matter should be faithful to the original copy

printing quality control elements

there are four control elements for printing: color, level, clarity and consistency

1. Color

color is the basis of product quality and directly determines the quality of products. Color control or management has always been a key link in the research and analysis of printing professionals

2. Level

refers to the gradient, which refers to the change of the color gradient recognizable in the image. It is the basis of accurate color reproduction

3. Sharpness

sharpness refers to the sharpness of image details, including three aspects: the sharpness of image fine levels, the sharpness of image contour edges and the sharpness of image details

4、 Consistency

"China is the world's largest cotton producing country. Consistency is uniformity, which includes two aspects. On the one hand, it refers to the consistency of ink volume in different parts of the same batch of printed matter, that is, in different ink areas. Generally, it is measured by the consistency of vertical and horizontal field density of printed matter. It reflects the stability of different parts of printed matter printed at the same time. On the other hand, it refers to the density of different batches of printed matter in the same part It reflects the stability of the printing press

to promote scientific and technological innovation, the weight of printed matter can be reduced by 10% (2) 0%. As long as these four aspects, namely, the color, level, clarity and consistency of printed matter, can be well controlled, high-quality printed matter can be obtained

printing quality control method

one of the methods of printing quality control is to scientifically and quantitatively control the printing quality (including printing quality and printing engineering quality) by using conventional signal strips, test strips, control strips and ladders, together with testing instruments and charts. At present, there are many kinds of signal strips and test strips used in various countries, such as GATF system in the United States, Bruner system in Switzerland, fergra system in Germany, and gelinda system. In China, the signals and test strips of GATF and Bruner of Switzerland are mostly used

common detection tools for printing include signal strip, test strip, control strip and ladder. The signal bar is mainly used for visual evaluation. Its function is relatively single, and it can only express the appearance quality information of printed matter. Such as sun exposure ladder, GATF code signal strip, color signal strip, etc. The test strip is a multi-functional marking element mainly based on the inspection and evaluation of densitometer. It combines visual identification with densitometer testing, and uses some domestic manufacturers to use high-precision load sensors to carry out force measurement to aid the numerical calculation of charts and curves. Control strip is a multi-functional control tool that combines visual evaluation and test evaluation of signal strip and test strip. For example, Bruner's third generation control strip. A ladder with equal difference density or points, used to control the quality of plate printing and printing

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