From which aspects should the quality of cotton direct injection printing be evaluated

Cotton direct injectionThe color difference of printing can be divided into

(1) The color difference of the pure cotton direct-injection original manuscript: Reproducing the color gradation of the original manuscript is the purpose of printing and copying. The highest standard of subjective evaluation is to make the digital printing and manuscript difficult to distinguish between true and false.

(2) The color difference of the same batch of pure cotton direct injection: refers to the color error between different printed sheets of the same batch of products at the same position in the same hue zone.

(3) The color difference between different batches of pure cotton direct spray: refers to the color error between different batches of the same product. If the color of each batch of printing is slightly different, when they are put together, customers will feel that these products are new and old. Even doubt whether its internal quality will be as unstable as its appearance, which will cause distrust of the product, and naturally cause the manufacturer to be dissatisfied with the quality of the printing plant.

Both customers and printers hope that the value of this color error is preferably zero. However, due to the limitations of various aspects in actual production, it is impossible to completely eliminate the color error. The only way to make the product is by strengthening the quality control of each link is The color quality difference is controlled within the specified color difference standard. Color tolerance refers to the color difference between the digital print and the original or proof proof that the customer can accept.

Whether in the printing process or when checking the quality after printing, the printing operator or quality inspector should always rely on their own feelings and experience to take the faithfulness and authenticity of the copy as the standard.Garment printing machineEvaluate the color quality of printed products. The faithfulness of reproduction is the degree to which the index code printing can reproduce the color gradation of the original. Digital printing is a kind of reproduction. During the entire color reproduction process from pre-press processing to printing, the original is the basis of our work. Reproducing the color gradation of the original is the purpose of printing reproduction. It is the highest standard of subjective evaluation to make the digital printing and the original manuscript reach the level of indistinguishable from the true and false.

When there is no manuscript for comparison, the color quality of digital printing is related to the sense of reality, that is, it is required to match the memory color of most people. Most people have a preconceived habit of common objects. If the main color of the digital print is different from the color of the real object, this digital print cannot be called a high-quality copy. In short, the subjective evaluation criteria for the color quality of digital printing is to replicate authenticity, naturalness, and coordination. Of course, it sometimes changes slightly with the customer's intention or the product's purpose.

Color quality and production control

TreadmillPrinting machineIn order to produce high-quality color digital printing, it is necessary to strengthen the quality control of the production process, and the quality control mainly depends on the objective evaluation criteria of the product, that is, a set of strict data specifications are formulated, and the treadmill printing machine uses various instruments To objectively measure and evaluate the color quality and other aspects of digital printing.

The purpose of color control management is to improve the small gaps between manuscripts, proofs and products. In the printing process, if the digital printing can be spot-checked at any time, the problem can be found through the biased information, and the cause can be found in time to correct the problem, thereby ensuring the reproduction quality of the digital printing. In addition to using density as a parameter to reflect the color quality of digital printing, it is necessary to promote the CIELab chromaticity value of color as a parameter to detect the quality of digital printing.

Every link of the treadmill printing machine must be managed by data, and every step must have a testing tool to detect it, otherwise there will be many errors.