Preparation of proofing grey cloth

1. Keeping the uniform cloth for small samples and large samples used is the basic condition for improving the accuracy of small samples.

For pure cotton fabrics, due to the variety, origin or maturity of cotton fibers Different fabric warp and weft density, different structure specifications, as well as different pretreatment methods and degree of pretreatment will cause different effects. For chemical fiber fabrics and blended textiles, such as pure polyester or polyester cotton, polyester and other blended textiles, due to the different raw materials and process operations used in the manufacture of synthetic fibers, the microstructure of the fiber will be directly caused by different manufacturers and different brands, resulting in different manufacturers and different brands. , batch number and specifications of polyester have different color absorption properties when dyeing.

In view of the above factors, when choosing proof grey cloth, the semi-product grey cloth used in large-scale production must be used. If proofing is performed in advance, the large The semi-product grey cloth used for production is not in time, so you can use a semi-product grey cloth similar to it to make a preliminary sample, and find out the basic material prescription in advance. After the semi-product grey cloth used for production is released, then make a compound sample. If it is with the standard color light If the sample does not match, the material must be adjusted until the sample matches the village sample. In summary, only by ensuring that the fabric used for large samples is consistent can we avoid differences in fiber quality, blending ratio, tissue specifications, whiteness, gloss, and moisture absorption properties. The difference in size and sample caused will improve the accuracy of sample enlarged samples.

2. Requirements for pretreatment of grey cloth according to the dyeing and dyeing materials:

Due to the different color depth and brightness of dyeing, the requirements for grey fabric treatment are also different. For example, the light bright color dyed by reactive dyes requires grey fabric to be carried out. Carefully practice bleaching to make it have better whiteness and hair effect; for dark colors, you can do half-waving or non-waving.

In addition, since some dyes have some special properties, some special requirements are also put forward for the pretreatment process. For example: reactive dyes When dyeing, since the dye is a reactive dye, it is more sensitive to the chemical environment it is exposed to. So when pre-treatment of grey fabrics is required: