Color difference is a common physical test in the textile testing industry. The causes of color difference in textiles are various, mainly related to textile raw materials, dyeing process, etc. In order to detect the degree of color difference of textiles and to control the color difference of textiles within a reasonable range, Textile Fabrics Friction Color Fastness Tester can be used.
The causes of textile color difference.
1. The impact of fabric raw materials
Different textiles use different fiber raw materials, even if the same dye and coloring process, due to different fiber properties, there are differences in the degree of absorption of dyes, will lead to color differences in textile fabrics.
2. Influence of dyestuff
The ratio of different dyes and the uneven concentration of dyeing solution will lead to the difference in the degree of coloring of the fabric. If the distribution of dyes in various parts of the fabric is uneven, color difference will be formed after solid color.
3. Dyeing conditions and environmental changes
In the textile dyeing process, it needs to go through many processes, due to mechanical structure reasons or improper operation, resulting in changes in coloring conditions, such as: changes in temperature, drying rate, uneven roller pressure, uneven addition of dyeing materials, etc., will lead to color differences in textile fabrics.
4. Color and light variation influence
This difference is not caused by the uneven distribution of dyes on the fabric, but due to some reasons caused by the change of color light of some dyes on the fabric.
Textile Fabrics Friction Color Fastness Tester.
The Friction Color Fastness Tester is used to accurately assess the color differences in textiles and to control the quality of textile products, making it easier to handle the color of textiles. We use the Friction Color Fastness Tester and a computerized color matching system to change the color of textile products and thus reduce the color difference between batches of textile products.
Friction Color Fastness Tester can accurately evaluate the degree of color difference between two products by automatically comparing the color difference between the sample and the inspected product, and then outputting three sets of CIE-LAB data and four sets of color difference data of ΔE, ΔL, Δa, Δb after color comparison.
The principle of its application is to measure the tri-stimulus value xyz of the sample by integration, and then calculate the color coordinates of the sample and other parameters. Usually a filter is used to cover the detector, and the relative spectral sensitivity of the detector S(λ) is corrected to the CIE recommended spectral tri-stimulus values x(λ), y(λ), z(λ). When receiving a photostimulus with such three photodetectors, the tri-stimulus values x, y, and z of the sample can be measured with a single integration. filters need to meet the Luther condition to precisely match the photodetectors.
Textile manufacturers can use the data measured by Friction Color Fastness Tester to color textiles with large color differences, thus ensuring the consistency of product color and reducing the corresponding losses.
Textile color difference prevention methods.
In order to ensure that the textile color difference is within a reasonable range, we need to check and analyze the color difference problem in each step of the dyeing process.
1. Material preparation
A color, regardless of batch size, first requires the same batch, color light and concentration of dyestuff. Otherwise, the formula has to be readjusted during dyeing and put into production after trial samples. Strictly controlling the color difference of textile raw materials is the first step to control the color difference of textiles.
Textile samples are prepared in strict accordance with the dose of the formula and the operation process. The technical conditions of the test sample, including pressure, speed, temperature, concentration, etc., must be the same as normal production, so that the color difference of the test sample can be checked to avoid the loss caused by the color difference problem of mass production.
Although the color difference of the formula can be checked to a certain extent through the sample, however, in the actual production process, because it is difficult to achieve complete consistency in the production process of different batches, it will be affected by various factors such as labor, equipment, etc., so there will still be a certain amount of color difference in mass production, so it is necessary to use professional color verification equipment, such as the use of Friction Color Fastness Tester to check the production of products for sampling, if there are obvious color difference problems, it is necessary to timely find the causes of color differences, strict control of textile color differences.
QINSUN instrument production of textile testing equipment in the printing, coating, auto parts, metal, home appliances, gold standard test paper, food safety, medical testing and other industries and research institutions are widely used, while the scope of industry applications are still expanding, the company persistently technical research and development and brand service to ensure the stability of the company's products, and is committed to technology to provide users with quality products and services. We are committed to providing users with quality products and services through technology. Mainly engaged in color measurement Friction Color Fastness Tester, spectrophotometer, standard light box, gloss meter, atomization meter, thickness meter, resolution test card, image test card, test software and other color matching system products and provide solutions, welcome to consult.