The rapid development of e-commerce, so that more and more consumers are accustomed to online shopping, because the concept of e-commerce to give people a convenience, and second, online shopping is generally cheaper than physical stores. However, the color difference problem that comes with it is also a real headache. So what is color difference in the end, what is the cause of the color difference, we can do those preventive measures for textile color problems?
What is color difference
Dyed textiles have different shades of shade and shades of light.
1. Color difference in the same batch: In the same batch of products, there is a color difference between the product box and the box of one color number, between the pieces and the pieces, between the bag and the package, and between the horse and the horse.
2. With the color difference: There is a color difference in the left middle of the same product, or there is a color difference or a color difference between the front and the back. Chromatic aberration is one of common rickets and multiple rickets in dyeing and finishing plants, which seriously affects the quality of dyed products.
Cause of color difference
Different kinds of fabrics have different fiber composition, different types of dyes and different process equipments used in dyeing, and different requirements and characteristics in dyeing processing. The causes and performances of rickets are not the same. Dry cleaning and stain treatment methods are also different. . Chromatic aberration has a variety of appearances, but the reasons are mainly the following.
a. The dye is unevenly distributed on the fabric in advance: if the dye is not evenly distributed on various parts of the fabric before fixing, the color difference will be formed after fixing. The main reasons for this phenomenon are:
1Fabric factors: due to different fiber properties or pre-treatment retreat, cooking, bleaching, and silk are not even enough to penetrate, so that the dyeing of the former semi-product is not uniform and causes differences in the degree of dye absorption.
(2) Absorption factors; Due to the mechanical structure or improper operation, the liquid-carrying rate of the various parts of the fabric is inconsistent, thus causing chromatic aberration. Uneven roll pressure, uneven dyeing, etc. will make the fabric absorb dye uneven.
3. Pre-baking factors: When pre-baking after padding, due to the inconsistent rate and degree of drying, dye migration occurs in different degrees, causing 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 distributed on the fabric in advance, but in the fixing process, if the conditions are not properly controlled (such as temperature, time, dye concentration, etc.), some parts of the fabric The dye was not fully fixed and was removed during post-treatment soaping, resulting in a color difference. For example, the disperse dyes have hot melt temperatures on both sides or inconsistently, partially reduced oxidized dyes or insufficient oxidation, poor steaming conditions of the reactive dyes, etc., can cause chromatic aberrations in the front, back, or left and right sides of the fabric.
c. Variation of dye shade: This difference is not caused by the uneven dye distribution on the fabric. Instead, due to some reasons, the color shade of some dyes on the fabric changes. Generally, there are several reasons:
1 Factors before dyeing: Semi-finished products have large differences in whiteness or pH, and often cause differences in shade after dyeing.
(2) Dyeing factors: For example, the hot dissolving temperature of disperse dyes is too high, which causes the shade of some dyes to become dark; over-reduction of vat dyes will also make the shades different.
3 after dyeing factors: in the finishing process. Such as resin finishing, high temperature stenter and the PH value of the fabric, etc., will cause the dye shades have varying degrees of change.
d. The color difference in online shopping is generally due to the difference of the computer monitor and the problem of shooting light, and more or less will produce some color difference. Sometimes, in order to make the picture more beautiful, the seller usually uses PS to retouch the picture and cause color difference.
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