Now that e-commerce channels are developing rapidly, we are used to almost everything on the Internet, because the concept of e-commerce gives people a convenience, and second, online shopping is generally cheaper than physical stores. When enjoying the high quality and low price, we can't help but worry about the quality of the goods. In particular, when we are shopping for clothes and home textile products, we are worried about fabrics, and we also care about the color difference of textiles. So what is the color difference, what is the cause of the color difference, we can do those preventive measures for the color difference of textiles?
1. What is the color difference: the shades of dyed textiles vary in color and shade.
1. The same batch of color difference: in the same batch of products. There is a color difference between the product box and the box of a color number, between the parts and between the parts, between the package and the package, and between the pieces and the pieces.
2. Same color difference: There is color difference in the left middle of the same product or color difference before or after or color difference between the front and back. Color difference is one of the common rickets and multiple rickets in dyeing and finishing factories, which seriously affects the quality of dyed products.
2. Cause of color difference
The fiber composition of various types of fabrics is different, the dye types and process equipment used in dyeing are different, and there are different requirements and characteristics in dyeing processing. The causes and performances of rickets are different, and the methods of dry cleaning and stain treatment are different. . The color difference is varied in appearance, but the reasons are mainly the following.
a. The dye is unevenly distributed on the fabric in advance: before the dye is fixed, if the distribution is uneven on all parts of the fabric, the color difference will be formed after the fixation. The main reasons for this phenomenon are:
1 fabric factor: due to different fiber properties or pre-treatment, retreat, boiling, bleaching, silk is not enough to penetrate, so that the semi-products before the dyeing is not uniform, causing differences in the degree of dye absorption.
2 liquid absorption factor; due to mechanical structural reasons or improper operation, the liquid rate of each part of the fabric is inconsistent, resulting in chromatic aberration. Uneven roll pressure, uneven dyeing, etc. will cause the fabric to absorb dye unevenness.
3. Pre-baking factor: When pre-baking after padding dyeing, the rate and degree of drying are inconsistent, causing the dye to move to different degrees, resulting in uneven distribution of the dye on the fabric.
b. The degree of fixation of the dye on the fabric is different: although the dye is uniformly distributed on the fabric in the early stage, it is in the fixation process. If the conditions are not properly controlled (such as temperature, time, dye concentration, etc.), the dye on some parts of the fabric is not fully fixed, and it is removed during the post-treatment soaping. This produces a chromatic aberration. For example, the hot-dissolving temperature of the disperse dye is inconsistent on both sides, the partial reduction of the vat dye or the insufficient oxidation, and the poor steaming conditions of the reactive dye, etc., which may cause chromatic aberration before and after the fabric.
c. Variation of dye shade: This difference is not due to uneven dye distribution on the fabric. However, for some reasons, the color of some dyes on the fabric changes, generally for the following reasons:
1 pre-dyeing factors: semi-products have uneven whiteness or a large difference in pH value, which often causes color difference after dyeing.
2 staining factors: For example, the dissolving dye has a too high heat-dissolving temperature, which makes the color light of some dyes become dull; the excessive reduction of the vat dyes also makes the color light different.
2 post-dyeing factors: in the finishing process. Such as resin finishing, high temperature tentering and the difference in PH value on the fabric, etc., will cause the dye shades to change to varying degrees.
4 soaping: if the soaping is not enough, the hair color will be insufficient. The color is not allowed. The low-temperature soaping agent ZJ-RH18 produced by our company has outstanding effect in the treatment of dyeing cotton after soaping with reactive dyes. The low-temperature soaping process is used in 0.1~0.5g/L, which not only saves energy and reduces emissions, reduces production costs and improves production efficiency. After washing, the fabric has pure color and no color difference troubles!
Understand these problems about the color difference of textiles, we can do it in online shopping and even when purchasing goods in physical stores, I hope to help you!
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