Direct dyes

Direct Dyes, which directly dissolve in water, have a high direct property of cellulose fibers, without the use of chemical methods to make fibers and other materials colored. Direct Dyes can be in weak acidic or neutral solution of protein fibers such as wool, silk) color). It is also used to dye cotton, linen, silk and rayon. Chromatography is complete, the price is low, the operation is convenient. The disadvantage is washing, light fastness is not ideal.

The molecular structure of the direct dyes with sulfonic acid group or carboxyl group arranged in a straight line. Aromatic ring structure is in the same plane,

Therefore, the direct dyes on cellulose fibers with a greater affinity, in the neutral medium, the direct staining, as long as the dye dissolved dry water, they can be stained.

The dye is adsorbed onto the surface of the solution, and then spread to the amorphous region of the fiber, and the formation of hydrogen bonds and Fan Dehua forces with the fiber molecules.

The derivative dyes have direct dyes and direct dyes copper salt.

Dynasul Liquid dyes are environmental-friendly liquid sulfuration dyes . Dynasul dyes are Sulphur Dyes for cotton with good wash fastness.

Sulphur dyes are inexpensive dyes used to dye cotton with dark colors. Dyeing is effected by heating the fabric in a solution of an organic compound, typically a nitrophenol derivative, and sulphide or polysulfide. The organic compound reacts with the sulphide source to form dark colors that adhere to the fabric. Sulphur Black 1, is our largest selling sulphur dye by volume.

Sulphur Dyes

Sulphur Dyes, Sulphur Green Dyes, Sulphur Black Dyes

Dynasty Chemicals (NingBo) Co., Ltd. , https://www.dychemco.com