In the process of commercial transactions, it is especially important to make appropriate quality evaluation of printed matter. The complexity of color printing process is well known. The production of a printed matter often takes more than a dozen steps to complete, including companies, staff, etc., different environments. At different times, the evaluation methods or requirements for printed materials are also different. Therefore, in this process, some specifications and corresponding observation conditions need to be set.

Therefore, we can only subject the external factors such as the environment to subjective evaluation of printed materials. This is fair and objective, so as to reduce the disputes caused by the environment, so the standard lighting environment and standard light source are necessary. .

Color difference of printed matter

The color difference can be divided into (1) original color difference: the color tone of the reproduced original is the purpose of printing and copying, so that the degree to which the printed matter and the original are difficult to distinguish is the highest standard of subjective evaluation. (2) The same batch of color difference: refers to the same position of the same batch of products in the same hue area, the color error between different sheets. (3) Color difference between different batches: refers to the color error between different batches of the same product. If the colors of each batch of printing are slightly different, when they are put together, the customers will feel that these goods have new and old points, and even suspect Whether its intrinsic quality will be as unstable as the appearance will cause distrust of the goods, and naturally cause manufacturers to be dissatisfied with the quality of the printing products.

As customers and printers, it is hoped that the value of this color error is preferably zero. However, due to various conditions in actual production, it is impossible to completely eliminate the color error. It can only be achieved by strengthening the quality control of each link. The color quality difference is controlled within the specified color difference standard. Color tolerance refers to the color difference between the prints that the customer can accept and the original or proof sheet.

We are a professional printing manufacturer,if you have any questions about the printing,please feel free to contact with us.