Sulphur Black BR

Product Application

Mainly used in dyeing on cotton, also used dyeing on cambric, viscose and vinylon

Product Property

Bright-black flake or grain, insoluble in water and alcohol. It is the green-black colour when it soluble in the solution of sodium sulfide

Fastness of dyes on cotton fabrics:

Product Package,Transport and Storage

Production workshop

FAQ

What is Sulphur black BR 240%?

Sulphur Black BR 240% is a synthetic dye that is used primarily in the textile industry for dyeing cotton, linen, and viscose fibers. It is a water-insoluble, black powder that is composed of a mixture of polysulfides and thiosulfates.

Sulphur Black BR 240% is known for its excellent light fastness, wash fastness, and resistance to fading. It is also a cost-effective dyeing solution and is widely used in the production of denim, work-wear, and other dark-colored fabrics.

How does Sulphur black BR 240% work?

Sulphur black BR 240% is a vat dye, which means that it works by forming insoluble pigments inside the fibers of the textile. The dye molecules are reduced to a water-soluble form using a reducing agent, such as sodium hydrosulfite, and then oxidized to an insoluble form inside the fiber using air or other oxidizing agents.

Sulphur black BR 240% contains sulfur and thiosulfate functional groups, which allow it to form strong covalent bonds with cellulose fibers in the presence of a reducing agent and an alkaline pH. The dye molecules then form aggregates or particles inside the fiber, which gives the fabric its dark black color.

The dyeing process typically involves immersing the textile in a bath containing the reducing agent and the dye, followed by oxidizing the fabric with air or other oxidizing agents. The fabric is then washed to remove any excess dye and reducing agent before it is dried and finished

What is the advantage of Sulphur black BR 240%?

High colorfastness: Sulphur black BR 240% has excellent colorfastness properties, which means that it resists fading or bleeding even after multiple washes. This makes it ideal for use in textiles that are subjected to frequent washing or exposure to sunlight.

Cost-effective: Sulphur black BR 240% is relatively inexpensive compared to other dye types, such as reactive or disperse dyes. This makes it a popular choice for mass production of textiles.

Wide range of applications: Sulphur black BR 240% can be used to dye a wide range of fibers, including cotton, linen, and viscose. It is also suitable for dyeing blends of these fibers with synthetic fibers, such as polyester.

Environmentally friendly: Sulphur black BR 240% is considered to be a relatively eco-friendly dye, as it does not require the use of toxic chemicals or heavy metals in the dyeing process. It is also biodegradable and does not pose a significant risk to the environment.

Good penetration: Sulphur black BR 240% has good penetration properties, which means that it can penetrate deep into the fibers of the textile to produce a uniform and consistent color. This makes it ideal for dyeing fabrics with a dense weave or thick pile.

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