How is non-woven fabric dyed? How much do you know abou […]
How is non-woven fabric dyed? How much do you know about this?
In fact, regarding color quality is the main quality standard of color products, the successful application of computer color matching system has realized the actual quantification of color evaluation. Quantitative methods can be used to quantitatively evaluate the stability of raw and auxiliary materials, provide product quality guarantees, optimize suppliers, and control purchase channels, but we need to emphasize that computer color matching is only a supplementary means to achieve the final product quality stability and standardized management The final result still needs to be judged by the human eye, affirmative. By measuring L, C, H, △ L, △ C, △ H, △ E, or L, a, we can more accurately reflect the difference in color.
On the basis of the original formula, the amount of certain colorants is increased by modifying the overlap of the color reflection curve and the standard color reflection curve on the display screen to always increase and decrease the type and amount of colorant. 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 device is also designed based on the above principles. Considering the color difference caused by various factors, the color matching device can modify the coloring material that has been prepared by the computer formula or experience. 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 different colorants in the database and then calculate the color tristimulus value of each group of formulas. The combination of the values one by one will inevitably increase the calculation time, so the general color matching is designed with 3 ~ 5 colorants to form a formula combination. The operator with the familiar color matching principle inputs it through the hard disk, and there is a computer selection. Application time. Computer color matching personnel need certain skills and experience to make the instrument quickly formulate, which will have different color difference values and different costs for operators to choose. After the color database is built, the measurement database is stored in the computer for a long time, and it can provide services for "computer color matching" at any time.