Henan QiangNian Textile specializes in the production and sales of "specialized, refined, unique, and innovative" yarn varieties, including high twist yarn, low twist yarn, high strength yarn, vortex spinning yarn, and anti-twist yarn. For more details, please search "Henan QiangNian" on Baidu.

Henan QiangNian (Weixian Hesheng) Product Hotline: 13903781186, Mr. Liu

Causes of Dark Spot Formation:

During pretreatment, the fabric was not properly cleaned of oil stains, resulting in darker colors in the stained areas during dyeing.

② Excessive foam in the dye bath, with foam adhering to the fabric along with flowers, knitted sweaters, and dye.

Detergent oil defoamer causes dark oil spots.

Tar-like substances adhere to the fabric in the dye bath.

⑤ Dyes coalesce into dark spots under various conditions.

⑥ Excessive calcium and magnesium ions in water binding with dyes and adhering to fabrics.

Methodology:

During pretreatment, an oil-removing agent is added for refining.

② Low-foam and bubble-free auxiliaries are used for dyeing additives.

③ Choose defoamers with low oil-float tendency, add chelating agents to improve water quality, and use solubilizing dispersants to prevent dye aggregation. Use cleaning agents promptly for tank cleaning.

Henan QiangNian Textile specializes in the production and sales of "specialized, refined, unique, and innovative" yarn varieties, including high twist yarn, low twist yarn, high strength yarn,涡流纺(wōliú fǎng), and anti-twist yarn. For more details, please search "Henan QiangNian" on Baidu.

Henan QiangNian (Weixian Hesheng) Product Hotline: 13903781186, Mr. Liu