Direct Fast Black G (Direct Black 19)

1. Product Overview

Direct Fast Black G, also known as Direct Black 19, is a widely used black azo direct dye. It produces deep black shades on cotton, viscose, and paper, with excellent solubility and strong affinity for cellulosic fibers. It is one of the most commonly used direct black dyes in textile and paper applications.

• CI Name & No.: Direct Black 19

• CAS No.: 6428-31-5

• Category: Direct dye (azo type)

• Appearance: Black powder

• Shade: Deep black with bluish tone

• Key Features: High solubility, good build-up, cost-effective for bulk dyeing

2. Technical Specifications

3. Performance & Benefits

• Deep black shade – rich, strong black with bluish undertone

• Excellent solubility – easy preparation of dye bath

• Good build-up – supports deep, full shades

• Uniform dyeing – reliable results on cotton and viscose

• Economic – widely used in large-scale textile and paper production

4. Applications

• Textiles: Cotton, viscose, rayon, and blended fabrics

• Paper: Deep black shade for packaging and specialty papers

• Leather: Used for black leather finishing

• Blends: Cotton/polyester blends and cotton/viscose

5. Quality & Compliance

• COA available for every batch (shade, strength, purity, moisture)

• APEO-free, compliant with EU restricted azo dye standards

• Heavy metals within international safety requirements

• SDS provided in English and other languages upon request

6. Packaging & Logistics

• Standard packaging: 25 kg fiber drums / cartons with PE inner bag

• MOQ: 100 kg (trial order) / 1 MT (bulk order)

• Delivery: 7–10 days from warehouse

• Shelf life: 24 months (stored in dry, ventilated conditions)

• Main ports: Tianjin / Qingdao / Shanghai

7. Samples & Support

• Free samples (10–50 g) available

• Courier freight borne by customer (DHL / UPS account preferred)

• Technical assistance: Shade matching, application support

8. Related Products

• Direct Red BWS (Direct Red 243) – dark-toned direct dye, often used in blends with black for shading adjustments

• Sulphur Black BR (Sulphur Black 1) – another popular black dye, widely used for cotton & denim

• Vat Blue RSN (Vat Blue 4) – deep vat dye, often combined with black for high-fastness applications