High-purity organic colorants and industry auxiliaries manufactured under strict quality standards for consistent performance.
Tianjin Sunrise Chem Group specializes in manufacturing and exporting high-quality dyestuffs. Our comprehensive catalog includes Direct dyes, Acid dyes, Basic dyes, Sulphur dyes, Solvent dyes, Liquid dyes, and Fluorescent dyes. Backed by decades of industrial manufacturing and international trade experience, we have built an unshakeable reputation for reliability, quality, and technical service, catering to leading companies across the denim, textile, leather, paper, and polymer industries worldwide.
We pride ourselves on offering customized solutions. Our team of laboratory experts works closely with clients to understand their unique processing challenges and develops tailored formulations. We actively seek strategic partnerships with global distributors, compounding facilities, and industrial manufacturing plants to explore mutual growth opportunities and establish long-lasting, stable commercial networks.
The ultimate deep-black organic compound powering advanced polymer compounding, high-precision printing inks, and protective coatings.
Nigrosine serves as the premier coloring agent for polyamides, specifically PA6 and PA66. Unlike carbon black, Nigrosine maintains the mechanical tensile strength, impact resistance, and electrical insulation properties of engineering plastics. It provides superior heat stability during high-temperature injection molding processes, preventing polymer degradation.
With exceptional solubility in alcohols, glycols, and esters, Solvent Black 5 and Solvent Black 7 are the core components of writing inks, industrial marking pen inks, and specialty flexographic printing inks. They deliver high color intensity, excellent lightfastness, and low sedimentation rates, ensuring smooth ink flow.
Acid Black 2 (Water-soluble Nigrosine) offers unmatched affinity to natural proteins, making it the industry standard for leather drum dyeing, spray finishing, and wood preservation stains. When formulated into nitrocellulose or phenolic resin coatings, it generates high-gloss, jet-black finishes that resist weathering and chemical wear.
In the global market, China has solidified its position as the major production hub for Nigrosine compounds due to structured chemical supply chains, state-of-the-art environmental infrastructure, and massive capacity scalability. Tianjin Sunrise Chem Group bridges the gap between raw manufacturing power and strict international regulations, delivering customized Nigrosine grades that fulfill the rigorous requirements of modern industrial sectors.
Cooperating with textile, paper, and plastic processing mills for many years shows that the factory has established a strong and reliable business relationship. This kind of long-term collaboration can bring numerous benefits, such as consistent orders, shared resources, and mutual support. It also indicates that the factory has a good track record of delivering quality products and meeting the needs of its partners. Our mission is to drive business growth by providing reliable and customized products. Our goal is to make a significant contribution to our customers' success by consistently delivering first-class products and exceptional customer service.
Environmental protection is the cornerstone of our innovation. We dedicate ourselves to providing clients with eco-friendly, high-quality colorants that balance productivity with environmental harmony, driving the industry towards a more sustainable development path while delivering high-performance products—for a greener textile industry and a sustainable future.
ZDHC Level 3 Program: The ZDHC program is a collaborative effort by leading brands, retailers, and suppliers in the textile and footwear industry to reduce the use of hazardous chemicals. The focus of this certification is on eliminating the release of hazardous chemicals into the environment throughout the entire supply chain. Achieving ZDHC certification indicates that our company has implemented robust chemical management procedures and has met the stringent requirements for chemical handling, wastewater treatment, and pollution prevention.
Global Organic Textile Standard (GOTS): GOTS ensures the organic status of textiles from the harvesting of raw materials to environmentally and socially responsible manufacturing. It guarantees that chemical inputs are minimized, and that strict environmental and labor standards are met throughout the production process. GOTS certified products are considered to be sustainable, safe, and ethical.
Explore our high-performance dyes, engineered for leather processing, paper coloration, synthetic fiber dyeing, and specialized industrial uses.
With years of experience, we have successfully established strong partnerships in many countries. Our dedication to meeting global demands and exceeding customer expectations has earned us a reputation as a reliable supplier worldwide.
We not only produce and export dyes and pigments but also prioritize long-term cooperation with our customers, providing them with quality services that exceed their expectations. One of the main reasons why customers choose us is the stable supply of dyes we provide. We have developed highly efficient manufacturing processes to ensure a continuous supply of our products. Our factories feature state-of-the-art equipment and a knowledgeable workforce, which enables us to fulfill the most demanding orders. With us, you can begin your manufacturing journey with confidence knowing that dye availability will never be an issue.
Apart from a steady supply, the quality of our dyes is another reason why we stand out in the market. We, SUNRISE CHEM, take pride in our commitment to producing dyes that consistently meet high standards of quality. Our experienced technicians carefully monitor the manufacturing process, ensuring that each batch of dyes is carefully tested for color fastness, durability, and other essential parameters. By choosing us, you can rest assured that your products will stand out in the market due to the vibrant and long-lasting color our dyes provide.
A deep dive into the chemical structure, synthesis pathways, and eco-friendly manufacturing methods driving modern black dyes.
Nigrosine is a complex mixture of synthetic black dyes primarily generated through the catalytic oxidation and condensation of aniline, nitrobenzene, and aniline hydrochloride in the presence of iron catalysts. Its chemical structure features a sequence of phenazine-based oligomers, which give it a deep, rich, and non-reflective black tone that cannot be easily replicated by blending other organic dyes. The structural variations dictate the solubility profile, resulting in three commercial categories:
When engineering plastics are formulated for automotive under-the-hood components, electrical connectors, or power tool housings, preserving the raw mechanical properties is critical. The integration of 0.5% to 1.5% Nigrosine Base (Solvent Black 7) ensures a jet-black aesthetic while maintaining the tensile and flexural modulus of the PA6/PA66. Due to its unique chemical compatibility, Nigrosine aligns with the amide linkages in nylon, which also acts as a processing aid during extrusion, decreasing melt viscosity and improving injection molding cycle times.
To avoid surface defects (such as "silver streaks" or splay marks) and to maintain mechanical stability, plastic compounders must ensure the Nigrosine utilized has an exceptionally low moisture content and low volatile organic compounds (VOCs). Tianjin Sunrise Chem Group employs advanced vacuum-drying and micronizing technologies, ensuring that our Nigrosine grades exhibit uniform particle size distribution, minimum moisture absorption, and thermal stability up to 300°C.
We firmly believe in building relationships with our clients based on trust and mutual benefit. We know that our customers' success is our success, so we are committed to providing quality services to meet their needs. Our dedicated customer support team is on hand to address any questions or concerns you may have. We value your feedback and strive to continuously improve our operations to serve you better. Our purpose is not just to supply dyes, but to be your trusted partner in achieving your business goals. By choosing us, you choose a partnership built on reliability, transparency and mutual success.
In a word, when choosing a dye factory with stable supply, high quality and excellent service, we are your best choice. With our attractive range of dyestuffs, coupled with our professional and customer-centric approach, we assure you that your decision to choose us as your preferred dyestuff factory will be a fruitful one. Contact us today and let's embark on a journey to success together.
Expert answers to the most common queries regarding Nigrosine synthesis, performance optimization, and global logistics.
High-performance dyes and solvent black variants engineered for marking inks, paper mills, and polymer applications.
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