Explore our highly requested range of industrial-grade colorants customized for international B2B clients
Established as a benchmark of reliability in the dyestuff manufacturing industry, Tianjin Sunrise Chem Group specializes in the R&D, customization, and high-volume production of industrial colorants. Our comprehensive product portfolio spans Direct dyes, Acid dyes, Basic dyes, Sulphur dyes, Solvent dyes, Liquid dyes, and Fluorescent dyes. Over the decades, we have established an unshakeable presence in global chemical supply networks, ensuring that our clients receive stable, eco-compliant color solutions tailored to their exact substrates.
Operating with a vision for green chemistry, we have integrated state-of-the-art environmental infrastructure with high-yield manufacturing lines. We recognize that today's competitive landscape demands more than just standard colorants; it requires certified safety parameters, high application performance, and supply chain transparency. This focus has earned us the trust of elite mills, chemical distributors, and manufacturing facilities across the continents.
Our core competence lies in our capability to offer customized dye formulations that align with distinct processing dynamics, local regulatory requirements, and temperature conditions. Cooperating with leading textile, leather, and paper mills for decades highlights our capacity to manage demanding contract parameters while maintaining rigorous batch-to-batch color replication.
By working as an integrated OEM Acid Black supplier, we assist our partners in overcoming operational challenges, such as wet rubbing fastness deficiencies, dye migration, and wastewater load parameters. Our dedication is not merely transactional; our business model is built on continuous collaboration to fuel long-term productivity and shared growth.
ZDHC Certification
Pre-shipment Lab Tested
Countries Supplied Globally
Certified Organic Textile Standard
Understanding application efficiency, molecular structures, and target substrate affinities
The global market for industrial dyes relies heavily on high-performance black colorants. Among these, Acid Black dyestuffs represent the cornerstone of coloration across nitrogenous, protein-based, and polyamide substrates. These synthetic organic compounds are categorized by their anionic nature, featuring one or more sulfonate (—SO3Na) groups that impart water solubility and enable strong electrostatic binding to cationic sites on wool, nylon, silk, and collagen-rich leather matrices.
As primary components in leather processing, industrial fabrics, and specialty applications (such as forensic detection, ink formulations, and wood stains), Acid Black is subject to high-performance expectations. Industrially critical variants like Acid Black ATT, Acid Black 1 (Amido Black 10B), and Acid Black 2 (Nigrosine, water-soluble or solvent-soluble) are selected based on key metrics: lightfastness, migration stability, water fastness, and environmental safety profiles.
Highly utilized in heavy-duty yarn, carpet wool, and chrome-tanned leather dyeing. Known for its strong penetration capability, high build-up properties, and cost-effective yield profiles.
An azo dye with high affinity for protein substrates. Extensively used in biochemical assays, forensic fingerprint imaging, wood staining, and high-contrast paper coloring.
Characterized by its deep, uniform blue-black undertone. Nigrosine crystals or powders offer unmatched deep coloration in plastics, phenol-formaldehyde resins, and leather finishes.
| Dye Classification | Primary Substrates | pH Range Stability | Lightfastness (1-8 scale) | Wash Fastness (1-5 scale) | Solubility Profile (90°C) |
|---|---|---|---|---|---|
| Acid Black ATT | Leather, Wool Blends, Nylon | 4.5 - 6.5 | 6 - 7 | 4 | ≥ 80 g/L |
| Acid Black 1 | Silk, Polyamides, Paper, Forensic Kit | 3.0 - 5.0 | 5 - 6 | 4 | ≥ 70 g/L |
| Acid Black 2 (Nigrosine) | Leather Finishes, Inks, Plastics, Wood | 5.0 - 8.0 | 7 | 4 - 5 | ≥ 90 g/L (Water Soluble) |
A look into our chemical synthesis, quality gates, and customized formulation pipeline
At Tianjin Sunrise Chem Group, our Acid Black production lines rely on clean diazo coupling reactions followed by precise crystallization parameters. Impurities and raw intermediates (such as free amines) are carefully filtered out, ensuring our products comply with modern eco-regulations.
Standardizing the physical state of the dye is critical. Depending on client preferences, we supply dyes in crystals, high-density granulated dust-free powders, or concentrated liquid forms. Each form factor is tailored to mitigate powder dispersion hazards in processing plants while ensuring rapid dissolve rates.
Our in-house analytical laboratories analyze every production batch using high-precision High-Performance Liquid Chromatography (HPLC) and spectrophotometric matching. This keeps deviations (ΔE) well below international industry limits.
All chemical intermediates undergo purity checks before synthesis to eliminate heavy metal contamination.
Diazo-coupling reactions are executed under computer-controlled temperature and pH settings.
Ultra-filtration systems lower inorganic salt concentrations, followed by uniform spray drying.
Each batch is tested for solubility, shade matching, and strength stability before dispatch.
Environmental stewardship is a key pillar of our B2B production model. Modern dye manufacturing faces strict environmental rules regarding wastewater composition, chemical oxygen demand (COD), and biochemical oxygen demand (BOD) loads.
By obtaining ZDHC (Zero Discharge of Hazardous Chemicals) Level 3 Certification and compliance with the Global Organic Textile Standard (GOTS), we guarantee that our synthetic pathways exclude restricted arylamines, alkylphenol ethoxylates (APEOs), and heavy metals.
This high-level chemical compliance enables our international partners to target demanding markets, including the European Union (REACH regulations) and North America, without risking shipment rejections due to chemical non-compliance.
Guarantees zero discharge of restricted hazardous substances throughout manufacturing.
Certified for processing under strict social and ecological criteria.
Employs bio-treatment facilities to minimize COD and BOD in process water.
Custom-engineered colorants catering to diverse industrial sectors from leather tanning to fingerprint forensics
Highly recommended for wool yarn dyeing and silk printing setups requiring strong leveling performance.
Ensuring consistent global distribution through professional packaging and reliable supply chains
Supply stability is a critical requirement for manufacturing plants. We mitigate lead-time risks by maintaining high raw material inventories and operating a container-loading hub located near primary shipping lanes in Tianjin, China.
Direct container routes from Tianjin port to major global transport hubs, minimizing B2B transport steps.
Technical details, industrial compatibility, and OEM ordering procedures
Complementary high-grade dyes designed for textile, leather, and wood coloring industries
Sunrise
