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How is the nonwoven dyed? How much do you know about this?
In fact, the color quality is the main quality scale of color products, and the successful application of computer color matching system realizes the realization of color evaluation. Quantitative methods can be used to quantitatively evaluate the stability of raw and auxiliary materials, provide guarantee for product quality, optimize suppliers, and control purchase channels. However, we need to emphasize that computer color matching is only an auxiliary means to achieve stable quality and standardized management of final products. The final result still needs to be judged by the human eye, for sure. By measuring L, C, H, △ L, △ C, △ H, △ E or L, a, and other optical indicators more accurately reflect the difference in color.
On the basis of the original formula, the addition of some coloring agents is always increased or decreased by the overlap of the modified color reflection curve on the display screen and the color reflection curve of the standard color. The two reflection curves are as close as possible to overlap. Get a reference recipe that adjusts the color difference. The formula modification program of the computer color matching instrument is also designed according to the above principle. Considering the color difference caused by various factors, the color matching instrument can modify the color material prepared by the computer formula or experience, and the semi-prepared color materials are respectively The colorants are compared and calculated with the corresponding colorants in the pigment database.
When it is necessary to measure a certain sample, after the sample is scanned by the computer in the future, the computer can automatically combine the different colorants of the database and then calculate the color tristimulus values of each group of formulas, and the tristimulus with the sample. The value is combined one by one, which is bound to increase the calculation time. Therefore, the general color matching is designed with 3~5 kinds of coloring agents to form a formula combination. The operator with the familiar color matching principle inputs through the hard disk, and the computer is selected, thus shortening the computer. Application time. The color matching personnel need to affirm the skill and experience to make the instrument quickly formulate the formula, which will have different color difference and different cost for the operator to choose. After the color database is constructed, the measurement database is stored in the computer for a long time, and the service can be provided for the "computer color matching" at any time.