How to dye non-woven fabrics

In fact, color quality is the main quality yardstick of color products, and the successful application of computer color matching systems has realized the real quantification of color evaluation. Quantitative methods can be used to quantitatively evaluate the stability of raw and auxiliary materials, provide guarantees for product quality, optimize suppliers, and control purchase channels, but we need to emphasize that computer color matching is only an auxiliary means to achieve stable quality and standardized management of the final product , The final result still needs to be judged by human eyes, affirmative. We measured L, C, H, △L, △C, △H, △E or L, a, and other optical indicators to reflect the difference in color more accurately. On the basis of the original formula, add some colorants to increase or decrease the type and amount of colorants by modifying the overlap of the color reflection curve and the standard sample color reflection curve on the display. The two reflection curves are as close as possible to overlap. Get the reference formula for adjusting the color difference. The formula modification program of the computer color matching instrument is also designed according to the above principles. Considering the color difference caused by various factors, the color matching instrument can modify the color materials that have been calculated by the computer formula or empirically prepared color materials. The colorants are compared and calculated respectively 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, the computer can automatically combine all the colorants in the database in different combinations, and then calculate the color tristimulus value of each group of formulas, and compare it with the sample tristimulus The values u200bu200bare combined one by one, which will inevitably increase the calculation time. Therefore, the general color matching is designed with 3~5 colorants to form a formula combination, and the operator who is familiar with the color matching principle inputs through the hard disk, and there is a computer to choose from, which shortens the computer Application time. The color matching personnel of the computer need affirmative skills and experience, so that the instrument can quickly give out the formula, which will have different color difference values u200bu200band different costs for the operator to choose. After the color database is built, the measurement database is stored in the computer for a long time, and can provide services for 'computer color matching' at any time.