Solid Sulfur Black – High‑strength, Cost‑effective for Denim & Cellulosics

Solid Sulfur Black is a black solid dye for sulfur reduction dyeing of cellulosic fibers (cotton, linen, viscose), especially denim. It offers high blackness, excellent uptake, good chemical stability, and low cost. Used also in leather, paper, rubber, plastics, and paints. Mature process with 2–8% owf at 85–95°C. Post-treatment improves fastness.

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What Problems Does It Solve? Where to Use?

Solid Sulfur Black solves the high cost and complex process of other black dyes (e.g., reactive black, direct black). It is used for sulfur reduction dyeing of cotton, linen, viscose, and their blends – especially denim black dyeing. It also colors leather, paper, rubber, plastics, paints, and architectural coatings. Whether yarn, fabric, or garment, it delivers deep black with good coverage.

What Makes It Attractive & Different?

Unlike many black dyes that require expensive auxiliaries, our Solid Sulfur Black offers excellent chemical stability, high dyeing strength, high exhaustion, pure shade, and intense blackness at a significantly lower cost. Its solubility is controllable and heat resistance is good. The dyeing process is mature, easy to operate, and requires low investment – ideal for small and medium dye houses.

Why Buy Ours Instead of Others?

Competitors’ sulfur blacks may have inconsistent shade, low strength, or poor fastness. Our Solid Sulfur Black provides reliable color fastness after proper post-treatment (e.g., fixing agent), meeting basic requirements for workwear, denim, home textiles, etc. With dosage of 2–8% owf at 85–95°C for 45–90 minutes, it offers a cost-effective, high-performance solution for bulk production. Choose proven quality and versatile application.

Parametric characteristics of products

Parameter	Value / Description
Product Name	Solid Sulfur Black
Appearance	Black solid
Moisture Content	≤ 6%
Chemical Type	Aniline-containing sulfide
Application Substrates	Cotton, linen, viscose fibers and their blends; also suitable for leather, paper, rubber, plastics, and paints
Typical Dosage (Textiles)	2 – 8% (fabric weight percentage)
Dyeing Temperature	85 – 95 °C
Dyeing Time	45 – 90 minutes
Dissolving	Dissolve in hot water and stir thoroughly before use
Post-treatment	Recommended to use a post-treatment agent (e.g., fixing agent) to improve color fastness
Storage	Store in a dry, ventilated place, away from direct sunlight, humidity, and high temperatures
Shelf Life	12 months
Packaging Specifications	200g sample, 25kg woven bag, 1000kg ton bag

Knowledge of popular science products

What is this product?

Solid Sulfur Black is a black solid dye (moisture ≤6%) containing anilinebased sulfur compounds. It offers high strength, pure shade, and intense blackness. It dissolves in hot water and is used for sulfur reduction dyeing of cellulosic fibers such as cotton, linen, and viscose, as well as leather, paper, rubber, plastics, and paints.

This product application?

For textiles, use 2–8% (owf) at 85–95°C for 45–90 minutes. Dissolve in hot water before use. Posttreatment with a fixing agent improves color fastness. Store in a dry, ventilated place away from sunlight and moisture. Shelf life is 12 months. Packaging: 200g samples, 25kg woven bags, or 1000kg ton bags.

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Product detail images:

Solid Sulfur Black is a black solid with moisture content ≤6%. It appears as a uniform black powder/lump. The dye contains anilinebased sulfur compounds. Before use, it is dissolved in hot water with thorough stirring. The solution yields a pure, intense black shade. Proper storage in dry, ventilated conditions keeps it stable for 12 months.

Application scenarios:

For textile dyeing (cotton, linen, viscose, and blends), use 2–8% (owf) at 85–95°C for 45–90 minutes. This is ideal for denim black dyeing, yarn, fabric, or garment. After dyeing, posttreatment with a fixing agent improves color fastness. Solid Sulfur Black is also used in leather, paper, rubber, plastics, paints, and architectural coatings. Packaging: 200g sample, 25kg woven bag, or 1000kg ton bag.