Quick-Pick by System
| Fiber Type | Dye Class | Application Process | Typical Color Range | Recommended Grade |
|---|---|---|---|---|
| Cotton (cellulosic) | Reactive Dye | Exhaust / Pad-Steam / Continuous | Full spectrum | Reactive Black 5, Blue 19, Red 195, Yellow 145 |
| Cotton (cellulosic) — Direct | Direct Dye | Exhaust, single-step | Brown / Black / Yellow | Direct dyestuff for leather, cotton |
| Cotton (Vat) | Vat Dye | Vat reduction then re-oxidation | Deep blue/indigo, deep colors | Vat Blue 4 (Indanthrone) |
| Cotton (Sulfur) | Sulfur Dye | Reduction-oxidation, dark heavy colors | Black / Navy / Brown | Sulfur Black 1 |
| Polyester | Disperse Dye | HT-HP / Carrier / Thermosol | Full spectrum | Disperse Blue 56, Red 60, Yellow 54 |
| Polyester — Print | Disperse Print | Sublimation / Print thickener | Bright colors, sharp print | Disperse print thickener + dye |
| Nylon (Polyamide) | Acid Dye | Exhaust, slightly acidic pH 4–6 | Bright colors, brilliant red | Acid Red 18, Blue 25 |
| Wool (Protein) | Acid Dye | Strong acid pH 2–4 | Full spectrum | Acid dye nylon-equivalent grades |
| Wool / Silk — Print | Acid Print Paste | Print application | Sharp bright colors | Acid dye print paste |
| Acrylic | Cationic Dye | HT-HP cationic exhaust | Brilliant colors | Cationic dye for acrylic |
| Leather | Acid / Direct / Reactive Leather | Exhaust on tanned leather | Earth tones, deep colors | Acid/Direct/Reactive dyestuff for leather |
| Hair Care (PPD-based) | Oxidative Dye Couplers | Oxidative dyeing | Black to light blonde | PPD intermediate, oxidative coupler |
All Grades (by chemistry class)
Reactive Dyes — Cotton / Cellulosic Fiber(7)
The largest dye category by global volume. Reactive dyes contain a reactive group (vinyl sulfone, chlorotriazine, fluorochlorotriazine, or bifunctional) that forms a covalent bond with cellulosic fiber hydroxyl groups, giving wash-fast bright colors. The pad-steam continuous process dominates volume cotton dyeing; exhaust dyeing serves smaller-batch operations.
textile dyeing auxiliaries
Reactive Dye Black 5
CAS: 17095-24-8
Reactive Dye Black 5 is the world's most widely used reactive black dye for cotton and cellulosic fibers, offering deep jet-black shades with outstanding all-round fastness properties. Based on the diazo structure, it provides excellent wash fastness and is the industry standard for exhaust dyeing of denim, casual wear, and home textiles. Compatible with standard alkali-salt exhaust dyeing processes.
View Details →textile dyeing auxiliaries
Reactive Dye Blue 19 (Turquoise)
CAS: 2580-78-1
Reactive Dye Blue 19, also known as Reactive Turquoise Blue, is a copper phthalocyanine-based reactive dye yielding unique bright turquoise shades on cotton and cellulosic fibers. It requires higher fixation temperatures and longer reaction times than conventional reactive dyes due to its large molecular structure. Widely used in sportswear, home textiles, and fashion fabrics.
View Details →textile dyeing auxiliaries
Reactive Dye Red 195
CAS: 72799-94-1
Reactive Dye Red 195 is a high-fixation bifunctional reactive dye specifically designed for dyeing cotton and cellulosic fibers. It forms a covalent bond with the fiber under alkaline conditions, delivering brilliant red shades with outstanding wash fastness. Widely adopted in continuous and exhaust dyeing processes for woven and knitted cotton fabrics.
View Details →textile dyeing auxiliaries
Reactive Dye Yellow 145
CAS: 108014-15-9
Reactive Dye Yellow 145 is a high-performance bifunctional reactive dye providing bright yellow shades on cotton and regenerated cellulosic fibers. Its VS/MCT dual reactive group structure offers superior fixation rates and excellent build-up properties for medium-to-deep shade dyeing. Ideal for trichromatic exhaust and continuous dyeing systems.
View Details →textile printing chemicals
Reactive Bifunctional Dye
CAS: 67906-38-1
Reactive Bifunctional Dye is a high-performance chemical for textile printing processes. Designed for excellent color fastness and print definition in reactive, pigment, and digital textile applications.
View Details →synthetic fiber chemicals
Reactive Dye for Cellulosic Fiber
CAS: 61814-57-1
Reactive Dye for Cellulosic Fiber for synthetic fiber production and finishing, enhancing processability, performance, and comfort properties of textile fibers.
View Details →leather tanning chemicals
Reactive Dyestuff for Leather
CAS: 61814-57-1
Reactive Dyestuff for Leather for leather tanning, finishing, and preservation processes, delivering softness, durability, and aesthetic quality to leather goods.
View Details →Disperse Dyes — Polyester(8)
The second-largest dye category, exclusively for polyester (and increasingly for PLA bioplastic). Disperse dyes are water-insoluble small molecules that diffuse into the hydrophobic polyester fiber matrix at high temperature/pressure (130°C in beam dyeing, 220°C in thermosol continuous). Sublimation grades enable digital printing onto polyester.
textile dyeing auxiliaries
Disperse Dye Blue 56
CAS: 12217-79-7
Disperse Dye Blue 56 is a high-sublimation-fastness azo-type disperse dye producing navy blue to royal blue shades on polyester and synthetic fiber blends. It exhibits excellent compatibility in trichromatic combinations and offers good thermosol properties. Commonly used in sportswear, outdoor fabrics, and automotive textiles requiring deep blue coloration.
View Details →textile dyeing auxiliaries
Disperse Dye Red 60
CAS: 17418-58-9
Disperse Dye Red 60 is an anthraquinone-type disperse dye delivering brilliant red-violet shades on polyester, nylon, and acetate fibers. It offers excellent sublimation fastness, making it ideal for heat-transfer printing applications. Widely used in automotive upholstery, sportswear, and polyester woven fabric dyeing.
View Details →textile dyeing auxiliaries
Disperse Dye Yellow 54
CAS: 12223-85-7
Disperse Dye Yellow 54 is a styryl-type disperse dye yielding brilliant greenish-yellow shades with very high light fastness on polyester fibers. It is particularly valued for its outstanding photostability and is preferred in outdoor, automotive, and military textile applications. Suitable for both exhaust and thermosol dyeing processes.
View Details →synthetic fiber chemicals
Disperse Dye for Polyester
CAS: 3769-57-1
Disperse Dye for Polyester for synthetic fiber production and finishing, enhancing processability, performance, and comfort properties of textile fibers.
View Details →textile printing chemicals
Disperse Print Thickener
CAS: 9004-32-4
Disperse Print Thickener is a high-performance chemical for textile printing processes. Designed for excellent color fastness and print definition in reactive, pigment, and digital textile applications.
View Details →textile dyeing auxiliaries
Dispersing Agent for Disperse Dye (NNO)
CAS: 36290-04-7
Dispersing Agent NNO (sodium naphthalene formaldehyde sulfonate condensate) is the most widely used dispersant for disperse dye milling and polyester dyeing. It maintains fine disperse dye particle size distribution in the dye bath, preventing dye agglomeration at high temperatures. Suitable for HT dyeing, thermosol processes, and disperse dye formulation manufacturing.
View Details →textile dyeing auxiliaries
Dye Carrier for Polyester (Dicyclohexyl Phthalate)
CAS: 84-61-7
Dicyclohexyl phthalate is an aromatic dye carrier that swells polyester fiber at atmospheric boil (100°C), allowing disperse dye penetration without high-pressure equipment. It temporarily plasticizes the PET polymer chain, increasing free volume for dye diffusion. Used in atmospheric pressure dyeing of polyester and polyester blends where HT equipment is unavailable.
View Details →synthetic fiber chemicals
Dye Carrier for Polyester Fiber
CAS: 140-11-4
Dye Carrier for Polyester Fiber for synthetic fiber production and finishing, enhancing processability, performance, and comfort properties of textile fibers.
View Details →Acid, Cationic, Direct, Vat, Sulfur — Specialty Fiber Classes(9)
Acid dyes for nylon and wool; cationic dyes for acrylic; direct dyes for cellulose (simpler than reactive but lower wash-fastness); vat dyes for deep-color cotton (denim indigo); sulfur dyes for dark heavy colors at low cost. Specialty leather dyes serve the global tannery industry.
textile dyeing auxiliaries
Acid Dye Blue 25
CAS: 6408-78-2
Acid Dye Blue 25 is an anthraquinone-type leveling acid dye yielding brilliant bright blue shades on wool, silk, and nylon. Its anthraquinone structure provides outstanding light fastness, making it suitable for high-durability wool suiting, upholstery, and nylon sportswear. Dyes under acidic pH 4–5.5 conditions with excellent bath exhaustion.
View Details →textile dyeing auxiliaries
Acid Dye Red 18
CAS: 2611-82-7
Acid Dye Red 18 is a leveling acid dye providing bright scarlet-red shades on wool, silk, and nylon fibers. It dyes under weakly acidic conditions (pH 4–5) with excellent leveling properties and uniform shade development. Widely used in wool knitwear, silk scarves, and nylon carpet dyeing.
View Details →synthetic fiber chemicals
Acid Dye for Nylon
CAS: 5850-80-6
Acid Dye for Nylon for synthetic fiber production and finishing, enhancing processability, performance, and comfort properties of textile fibers.
View Details →textile printing chemicals
Acid Dye Print Paste
CAS: 72-57-1
Acid Dye Print Paste is a high-performance chemical for textile printing processes. Designed for excellent color fastness and print definition in reactive, pigment, and digital textile applications.
View Details →synthetic fiber chemicals
Cationic Dye for Acrylic
CAS: 2185-86-6
Cationic Dye for Acrylic for synthetic fiber production and finishing, enhancing processability, performance, and comfort properties of textile fibers.
View Details →textile dyeing auxiliaries
Vat Dye Blue 4 (Indanthrone)
CAS: 81-77-6
Vat Dye Blue 4, chemically known as Indanthrone, is the benchmark vat dye for cotton delivering deep navy-blue shades with the highest known light and wash fastness ratings. Applied via sodium dithionite/caustic soda reduction, it forms an insoluble colored pigment within the fiber on re-oxidation. Preferred in workwear, military uniform, and high-end denim dyeing.
View Details →textile dyeing auxiliaries
Sulfur Dye Black 1
CAS: 1326-82-5
Sulfur Dye Black 1 is the world's most consumed textile colorant, providing deep jet-black shades on cotton and cellulosic fibers at very low cost. Applied by reduction with sodium sulfide, then re-oxidized in air or with oxidizing agents to lock color inside the fiber. The workhorse dye for denim warp yarn, cotton knit, and casualwear black dyeing worldwide.
View Details →leather tanning chemicals
Direct Dyestuff for Leather
CAS: 2610-11-9
Direct Dyestuff for Leather for leather tanning, finishing, and preservation processes, delivering softness, durability, and aesthetic quality to leather goods.
View Details →leather tanning chemicals
Acid Dyestuff for Leather
CAS: 5850-80-6
Acid Dyestuff for Leather for leather tanning, finishing, and preservation processes, delivering softness, durability, and aesthetic quality to leather goods.
View Details →Dye Intermediates — H-Acid, J-Acid, Aniline Derivatives(9)
Upstream precursors for dye synthesis. H-acid (8-amino-1-naphthol-3,6-disulfonic acid) is the workhorse intermediate for azo dyes (reactive, acid, direct); J-acid for high-purity blacks; aniline and its substituted derivatives (m/o/p-nitroaniline, p-chloroaniline) for azo dye diazotization; resorcinol for coupling. PPD (p-phenylenediamine) is the hair-dye intermediate. Concentrated in Henan (Xinxiang, Mengzhou) and Zhejiang.
dye pigment intermediates
H-Acid (8-Amino-1-Naphthol-3,6-Disulfonic Acid)
CAS: 90-20-0
H-Acid is one of the most important naphthalene-based coupling components in the dye industry, used extensively in the synthesis of navy blue, black, and dark-shade reactive and direct azo dyes for cotton and wool. Its combination of amino, hydroxyl, and two sulfonic acid groups provides excellent coupling reactivity and contributes high wash fastness to finished dyes. Chemzip supplies H-Acid in both free acid and sodium salt forms to meet diverse formulation needs.
View Details →dye pigment intermediates
J-Acid (6-Amino-1-Naphthol-3-Sulfonic Acid)
CAS: 87-02-5
J-Acid is a key naphthalene-based coupling component used in the synthesis of red, bordeaux, and violet azo dyes for textile, leather, and paper applications. Unlike H-Acid, it carries only one sulfonic acid group, giving it different coupling selectivity and enabling dyes with distinct hue profiles. Chemzip supplies high-purity J-Acid to dye manufacturers seeking consistent quality for specialty color formulations.
View Details →dye pigment intermediates
Aniline
CAS: 62-53-3
Aniline is the fundamental aromatic amine intermediate used in the synthesis of azo dyes, reactive dyes, and a wide range of organic pigments. As a primary building block for the dye and pigment industry, it undergoes diazotization reactions to form diazonium salts that couple with various coupling components. Chemzip supplies industrial-grade aniline meeting strict purity specifications for dyestuff manufacturers worldwide.
View Details →dye pigment intermediates
Meta-Nitroaniline (m-NA)
CAS: 99-09-2
Meta-nitroaniline (m-NA) serves as a versatile intermediate for yellow and greenish-yellow azo dyes, as well as a building block for pharmaceuticals and agrochemicals. Its meta-substitution pattern allows coupling reactions that are difficult to achieve with para or ortho isomers, making it valuable for specialty dye formulations. Chemzip provides consistent-quality m-NA for dye and chemical manufacturers.
View Details →dye pigment intermediates
Ortho-Nitroaniline (o-NA)
CAS: 88-74-4
Ortho-nitroaniline (o-NA) is an important aromatic amine intermediate primarily used in the synthesis of orange and red azo dyes and as a precursor for pesticide and pharmaceutical production. Its ortho-substitution pattern imparts unique coupling characteristics that yield vivid orange hues in reactive and direct dyes. Chemzip supplies high-purity o-NA meeting international dyestuff industry standards.
View Details →dye pigment intermediates
Para-Nitroaniline (p-NA)
CAS: 100-01-6
Para-nitroaniline (p-NA) is a key diazo component in the manufacture of azo dyes, particularly fast yellow and orange dyes used in textiles, leather, and paper. It undergoes diazotization at low temperature and couples with naphthalenic and phenolic components to produce brilliant shades. Chemzip offers technical and refined grades to meet various manufacturing requirements.
View Details →dye pigment intermediates
Para-Chloroaniline (p-CA)
CAS: 106-47-8
Para-chloroaniline is a halogenated aromatic amine that serves as a diazonium-forming component in the synthesis of fast, light-fast azo dyes for textiles, leather, and printing inks. The chloro substituent enhances the electron-withdrawing character, producing azo dyes with improved lightfastness compared to unsubstituted aniline derivatives. Chemzip provides high-purity p-CA to dye and pigment manufacturers globally.
View Details →dye pigment intermediates
Resorcinol (1,3-Dihydroxybenzene)
CAS: 108-46-3
Resorcinol is a dihydric phenol serving as a coupling component in the synthesis of fluorescent dyes (fluorescein, eosin), azo dyes, and as a key raw material for resorcinol-formaldehyde resin used in tire cord adhesion. In the dye and colorant industry, it enables the synthesis of brilliant yellow and orange fluorescent dyes used in highlighters, safety garments, and paper. Chemzip supplies technical-grade resorcinol for dyestuff and polymer applications.
View Details →cosmetic hair care chemicals
PPD Hair Dye Intermediate
CAS: 106-50-3
PPD Hair Dye Intermediate for hair care and styling product formulation, delivering conditioning, moisturizing, repair, and styling performance.
View Details →Dye Auxiliaries — Fixing Agents, Soaping, Carriers, Print Pastes(12)
Process chemistry that supports dye application but is not the colorant itself. Reactive dye fixing agents improve wash-fastness; soaping agents wash out unfixed dye; dispersing agents (NNO/Setamol) keep disperse dye particles stabilized; print pastes carry dye through screen printing; pH buffers and water softeners ensure consistent bath chemistry.
textile leather additives
Reactive Dye Fixing Agent
CAS: 68555-36-2
Reactive dye fixing agent is a cationic polymer that forms ionic bonds with unfixed reactive dye molecules on cellulosic fibers, significantly improving wet fastness, wash fastness, and perspiration fastness of dyed fabrics. It reduces hydrolyzed dye migration without causing shade change or bronzing effect. Suitable for padding and exhaust application after reactive dyeing.
View Details →textile leather additives
Direct Dye Fixing Agent
CAS: 26590-05-6
Direct dye fixing agent is a cationic compound that crosslinks direct dye molecules on cellulosic fibers to form insoluble complexes, dramatically improving wash fastness and light fastness of direct-dyed cotton and viscose fabrics. It creates a protective polymer network around dye molecules, preventing dye bleeding during laundering. Widely used in the finishing of direct-dyed woven and knitted fabrics.
View Details →leather tanning chemicals
Dye Fixing Agent for Leather
CAS: 108-78-1
Dye Fixing Agent for Leather for leather tanning, finishing, and preservation processes, delivering softness, durability, and aesthetic quality to leather goods.
View Details →textile dyeing auxiliaries
Cationic Dye Fixative for Reactive Dye
CAS: 26590-05-6
A polyamine-based cationic fixative designed to improve wet fastness and washing fastness of reactive-dyed cotton and viscose fabrics. It forms an ionic complex with unfixed reactive dye anions on the fiber surface, reducing dye bleeding without significantly altering the original shade. Commonly used as an after-treatment in exhaust and continuous dyeing processes.
View Details →textile dyeing auxiliaries
Soaping Agent for Reactive Dye (After-Treatment)
A high-performance nonionic soaping agent specially formulated to remove unfixed reactive dye and hydrolyzed dye from cotton fabric after dyeing. It prevents back-staining of the dyed fabric during the soaping wash and achieves high wet fastness standards in a single soaping step at 95°C. Suitable for all reactive dye classes including vinyl sulfone and MCT types.
View Details →textile leather additives
Dyeing Auxiliary
CAS: 64742-47-8
Dyeing auxiliary is a multifunctional surfactant blend that acts as a carrier, dispersant, and leveling agent in textile dyeing processes to improve dye penetration, migration, and exhaustion on various fiber substrates. It optimizes dye-fiber interaction and prevents defects such as streaks, uneven uptake, and dye agglomeration during high-temperature dyeing. Suitable for polyester, nylon, cotton, and wool across disperse, acid, reactive, and direct dye applications.
View Details →textile leather additives
Leather Dyeing Auxiliary
Leather dyeing auxiliaries are a broad class of specialty chemicals that optimize the uptake, penetration, and fixation of dyes on leather during the dyeing process. They include leveling agents that ensure uniform color distribution, penetration aids that drive dye into the corium, and fixatives that lock dye molecules to the leather substrate. Properly selected dyeing auxiliaries reduce dye consumption and improve colorfastness ratings.
View Details →textile printing chemicals
Pad Dyeing Auxiliaries
CAS: 68155-09-9
Pad Dyeing Auxiliaries is a high-performance chemical for textile printing processes. Designed for excellent color fastness and print definition in reactive, pigment, and digital textile applications.
View Details →textile dyeing auxiliaries
Ammonium Sulfate (pH Buffer for Reactive Dyeing)
CAS: 7783-20-2
Technical-grade ammonium sulfate is used in reactive dye exhaust dyeing as a mild pH buffer and slow-release alkali source, providing controlled dye exhaustion and fixation. When heated, it hydrolyzes to release ammonia and sulfuric acid, gradually lowering bath pH to promote reactive dye fixation in a more controlled manner than direct alkali addition. Also used as a diluent and anti-migration agent in disperse dye printing.
View Details →textile dyeing auxiliaries
Sodium Carbonate (Fixation Alkali for Reactive Dye)
CAS: 497-19-8
Dense soda ash (sodium carbonate, Na2CO3) is the standard fixation alkali used in reactive dye exhaust and pad dyeing of cotton. It raises the dyebath pH to 10.5–11.5, activating the hydroxyl groups on cellulose fiber for covalent bonding with reactive dye groups. Widely used in both exhaustion (adding at 50°C+) and continuous pad-steam (pre-padded) processes.
View Details →textile dyeing auxiliaries
Urea (Dye Solubilizer for Printing)
CAS: 57-13-6
Technical-grade urea is an essential auxiliary in reactive dye printing paste formulations. It acts as a dye solubilizer and hygroscopic agent that maintains moisture in the print area during steaming, promoting dye dissolution and migration into the fiber for high fixation efficiency. Typically used at 50–200 g/kg in print paste alongside sodium alginate and alkali.
View Details →textile dyeing auxiliaries
Sodium Hexametaphosphate (Water Softener for Textile)
CAS: 10124-56-8
Sodium Hexametaphosphate (SHMP) is a polyphosphate water softener and sequestering agent used in textile dyeing and finishing to prevent calcium and magnesium scale formation. It complexes hardness ions in process water to maintain dye solubility and prevent precipitation on fabric and equipment. Cost-effective alternative to EDTA in medium-hardness water conditions.
View Details →Imported Brand → China Equivalent
Equivalents are indicative; verify against TDS for project-critical applications.
| International Brand Grade | China Equivalent | Major Chinese Producers |
|---|---|---|
| DyStar Remazol Black B (Reactive Black 5) | Reactive Black 5 | 浙江龙盛 (Longsheng), 浙江闰土 (Runtu), 江苏吉华 |
| Huntsman Avitera (multifunctional reactive) | Reactive Bifunctional Dye | 浙江龙盛, 浙江闰土 |
| DyStar Dianix (Disperse Blue 56) | Disperse Blue 56 | 浙江龙盛, 江苏亚邦, 闰土 |
| Clariant Foron (Disperse Red 60) | Disperse Red 60 | 浙江龙盛, 浙江闰土, 浙江山峪 |
| DyStar Telon (Acid Red 18) | Acid Red 18 | 浙江龙盛, 江苏吉华 |
| Sandoz Lanasyn / Tectilon (Acid) | Acid dye nylon equivalent series | 浙江龙盛, 江苏亚邦 |
| Ciba Astrazon (Cationic dye) | Cationic dye for acrylic | 浙江龙盛, 上海远东 |
| BASF Indanthrene Blue (Vat Blue 4) | Vat Blue 4 Indanthrone | 上海安诺其, 浙江龙盛 |
| LANXESS H-acid (intermediate) | H-acid 8-amino-1-naphthol-3,6-disulfonic | 河南新乡迈奇 (Maiqi), 江苏盐城天嘉宜, 浙江华星化工 |
| BASF Aniline (intermediate) | Aniline industrial grade | 山东金岭化工, 江苏南通星辰, 河南神马 |
| Hodogaya / Mitsubishi PPD | p-Phenylenediamine PPD industrial / hair-grade | 河南许昌恒生 (Hensheng), 江苏 BASF |
Frequently Asked Questions
▶Reactive vs Direct dyes for cotton — which should I choose?
Reactive dyes give bright, wash-fast colors (ISO 105-C06 ≥4 wash rating) at slightly higher cost — they covalently bond to cellulose. Direct dyes are cheaper and process-simpler but have moderate wash-fastness (rating 2–3) — they only physically adsorb to fiber. Modern cotton textiles use reactive; direct dyes survive in cost-sensitive markets and for after-treatment-improved formulations.
Reactive vs Direct dyes for cotton — which should I choose?
Reactive dyes give bright, wash-fast colors (ISO 105-C06 ≥4 wash rating) at slightly higher cost — they covalently bond to cellulose. Direct dyes are cheaper and process-simpler but have moderate wash-fastness (rating 2–3) — they only physically adsorb to fiber. Modern cotton textiles use reactive; direct dyes survive in cost-sensitive markets and for after-treatment-improved formulations.
▶What is the difference between disperse dye for HT and carrier method?
HT-HP (high-temperature high-pressure) at 130°C dyes polyester directly without carrier — the standard for new equipment. Carrier method at 100°C requires a swelling agent (e.g., dye carrier for polyester) to open the polyester structure — used in older atmospheric-pressure equipment. Thermosol (220°C continuous) is the third method for woven fabric.
What is the difference between disperse dye for HT and carrier method?
HT-HP (high-temperature high-pressure) at 130°C dyes polyester directly without carrier — the standard for new equipment. Carrier method at 100°C requires a swelling agent (e.g., dye carrier for polyester) to open the polyester structure — used in older atmospheric-pressure equipment. Thermosol (220°C continuous) is the third method for woven fabric.
▶Why do my reactive-dyed cotton fabrics fade in wash?
Three common causes: (1) unfixed dye not properly washed off (need adequate soaping), (2) hydrolyzed dye precipitation in the bath, (3) high alkalinity damaging the covalent bond during washing. Use after-treatment with reactive-dye fixing agent and proper soaping protocol.
Why do my reactive-dyed cotton fabrics fade in wash?
Three common causes: (1) unfixed dye not properly washed off (need adequate soaping), (2) hydrolyzed dye precipitation in the bath, (3) high alkalinity damaging the covalent bond during washing. Use after-treatment with reactive-dye fixing agent and proper soaping protocol.
▶Which dye intermediates are restricted by REACH or ETAD?
Specific azo-cleaving amine intermediates (24 listed in EU directive 2002/61/EC) are banned from textiles entering EU markets — benzidine, 4-aminobiphenyl, o-toluidine, etc. Dyes that release these amines upon reductive cleavage are prohibited. Most modern reactive, disperse, and acid dyes are designed to avoid these intermediates.
Which dye intermediates are restricted by REACH or ETAD?
Specific azo-cleaving amine intermediates (24 listed in EU directive 2002/61/EC) are banned from textiles entering EU markets — benzidine, 4-aminobiphenyl, o-toluidine, etc. Dyes that release these amines upon reductive cleavage are prohibited. Most modern reactive, disperse, and acid dyes are designed to avoid these intermediates.
▶Why do Indian textile dye houses prefer Chinese dyes over Indian-made?
Chinese dyes typically offer better batch-to-batch shade consistency (deviation <0.5 ΔE vs Indian 1–2 ΔE), broader product portfolio depth per category, and competitive pricing on bulk-volume contracts. Indian dye houses use Chinese dyes for shade matching to international brand specs, while Indian producers retain domestic-market volume on commodity grades.
Why do Indian textile dye houses prefer Chinese dyes over Indian-made?
Chinese dyes typically offer better batch-to-batch shade consistency (deviation <0.5 ΔE vs Indian 1–2 ΔE), broader product portfolio depth per category, and competitive pricing on bulk-volume contracts. Indian dye houses use Chinese dyes for shade matching to international brand specs, while Indian producers retain domestic-market volume on commodity grades.
▶What is the typical CIF price differential between Chinese and EU dyes?
Commodity-grade reactive and disperse dyes from Chinese producers are 50–70% lower CIF than equivalent DyStar / Huntsman / Clariant grades. The gap narrows to 25–40% for specialty multifunctional reactive dyes (Avitera-equivalent), and to 15–25% for high-end disperse dyes with proprietary chromophores.
What is the typical CIF price differential between Chinese and EU dyes?
Commodity-grade reactive and disperse dyes from Chinese producers are 50–70% lower CIF than equivalent DyStar / Huntsman / Clariant grades. The gap narrows to 25–40% for specialty multifunctional reactive dyes (Avitera-equivalent), and to 15–25% for high-end disperse dyes with proprietary chromophores.
▶What documents and certifications come with the dye?
COA (color strength, shade ΔE, moisture, salt content, banned amine test per ISO 17234), SDS/MSDS, TDS standard. OEKO-TEX 100 certificate available for finished-textile-grade dyes; ZDHC MRSL compliance for global apparel brands (Levi's, H&M, Inditex, Nike supply chain). ETAD compliance statement for EU buyers.
What documents and certifications come with the dye?
COA (color strength, shade ΔE, moisture, salt content, banned amine test per ISO 17234), SDS/MSDS, TDS standard. OEKO-TEX 100 certificate available for finished-textile-grade dyes; ZDHC MRSL compliance for global apparel brands (Levi's, H&M, Inditex, Nike supply chain). ETAD compliance statement for EU buyers.
▶MOQ, packaging, lead time for dye export?
Samples 0.5–2 kg free; standard commercial MOQ 100–500 kg for finished dye, 1 metric ton for intermediates (H-acid, aniline). Packaging: 25 kg fiber drum (most common), 1 t bulk-bag, 50 kg HDPE drum for liquid. Lead time Asia 2-3 weeks, EU/NA 5-7 weeks, India 10-15 days.
MOQ, packaging, lead time for dye export?
Samples 0.5–2 kg free; standard commercial MOQ 100–500 kg for finished dye, 1 metric ton for intermediates (H-acid, aniline). Packaging: 25 kg fiber drum (most common), 1 t bulk-bag, 50 kg HDPE drum for liquid. Lead time Asia 2-3 weeks, EU/NA 5-7 weeks, India 10-15 days.