Dyestuff Knowledge Center

By Dhruv Garg, Director, Avi Chemicals | Updated 8 November 2026 Acid Red 131 (C.I. Acid Red 131, also sold as Acid Red 3BN and Acid Milling Red 3BN) is a bluish red weak acid dye used to colour wool, silk, nylon and leather. It is a single azo dye, soluble in water, applied in a weakly acidic to near neutral bath. Avi Chemicals makes it in Ahmedabad, India, and ships it in bulk from 50 kg. This page is written for traders, agents and buyers. It covers what you need to compar

Choosing between pigment printing and reactive printing is not simply a question of which process produces a better-looking fabric. The right printing method depends on the fibre, required colour performance, hand feel, production process, fastness requirements and the type of textile being manufactured. For textile mills, garment manufacturers, and sourcing teams, understanding the difference between pigment and reactive printing can help avoid problems later in production.

By Dhruv Garg, Director, Avi Chemicals | Updated 2 October 2026 To import dyes from India to Indonesia without surprises, qualify the manufacturer before you compare prices. Ask for a batch-specific CoA, TDS and MSDS, test a free sample in your own lab, run a small trial lot, and agree payment terms in writing. At Avi Chemicals, orders start at 50 kgs. Supplier snapshot: Avi Chemicals, Vatva GIDC, Ahmedabad Minimum order 50 kg Free sample 100 gms Monthly capacity More than 20

Pigment paste is a water-based dispersion of fine pigment particles used to print and colour textiles. A printer mixes it with a binder and a thickener, prints it on the fabric, then heat cures it so the binder film fixes the colour on the surface. It works on cotton, polyester and blends, and it needs no steaming or full wash-off. Key points for buyers Compare suppliers on colour strength and batch consistency, not only on price per kg. Ask for the technical data sheet (TDS)

If you're sourcing H Acid-linked dyes into Turkey, Bangladesh, Vietnam, Morocco, Brazil, Italy, Mexico or anywhere else outside India, you've probably already felt this in your supplier quotes even if nobody's explained why. In February 2026, domestic H Acid in India was trading around $5.85/kg (₹550). By September, it had climbed to roughly $13.80/kg (₹1,300) — a 136% increase in seven months, with more than half of that move happening in the last four weeks alone. This isn'

Getting a deep, uniform black with consistent shade and the required fastness can be challenging, especially when the same result needs to be reproduced across production batches. Acid Black 210 is widely used for black shades in leather and suitable textile applications where shade depth, consistency and performance matter. Choosing an Acid Black 210 supplier, however, involves more than comparing price per kilogram. Strength, shade tone, solubility, application performance,

Direct Black 22 Manufacturer and Supplier: A Buyer's Guide Most people searching "Direct Black 22 manufacturer" already know what the dye does. What they actually need to figure out is who to trust with the order — and that's usually harder than it should be, because most supplier pages read like a chemistry textbook and tell you nothing about how the company actually operates. So this one's written a bit differently. I'll cover the technical basics quickly, then spend more t

For a nylon-cotton blend, the honest answer is usually both — not one or the other. Reactive dyes fix onto the cotton portion. Acid dyes fix onto the nylon portion. The two are run as a combined or sequential bath. Specify only one class and you almost always end up with one fiber pale, chalky, or off-shade against the other. If you're a trader quoting a nylon-cotton order, or a buying house reviewing a supplier's recipe, the real decision isn't "acid or reactive." It's which

A trader in Casablanca once told me about a container of what was sold to him as a premium reactive dye. The paperwork looked fine at a glance — a CoA, an MSDS, even a TDS with numbers on it. Except the CoA had no batch number tying it to the actual lot, the MSDS was a generic template lifted from a competitor's website, and the shade came out nearly a full point off on CMC ΔE once it hit a real dye bath. By the time he figured it out, the shipment was already at his customer

A distributor in Bursa places an order, gets a price and a smile, and no real answer on when the container actually lands. Six weeks later it's still "in transit" somewhere past Suez, the dye house is idle, and the only paperwork that showed up with the shipment is an invoice — no CoA, no REACH letter, nothing the buyer's own customer asked for. That's the actual failure mode we see on the Turkey and Morocco corridor, and it has nothing to do with the dye itself. It's a suppl

What you'll learn in this piece: Why the same shipment can cost $0.19/kg or $0.65/kg in freight alone, depending on one decision The MOQ cost curve manufacturers work from, and how to negotiate against it instead of just asking for a discount How mixing Reactive, Acid, Direct, and Pigment orders into one container changes your landed cost across all four Every dye trader has had this month. The order books look fine, the buyer paid on time, and yet the bank statement says you

A trial lot comes back perfect. CMC ΔE under 0.5, the dye house is happy, the sample is approved. Three container loads later, the same recipe is drifting half a shade warmer, and now you're the one fielding the call asking what changed. Nothing changed on the dye house floor. Something changed at the supplier's end — a raw material lot, a drying batch, a strength variance nobody flagged. If you trade or buy reactive dyes for cotton, you've had this conversation, or you will.

A container of the wrong form doesn't fail because the color was off. It fails six weeks later, when your buyer in Ho Chi Minh City calls to say the drums arrived separated, or your customer in São Paulo can't get consistent shade depth lot to lot because nobody told them the powder needed a different dispersion step than what their old supplier sent. Get the form wrong for your market and you're not looking at a quality complaint. You're looking at a customer who quietly mov

Choosing between Indian and Chinese dye suppliers? Compare quality, compliance, lead times, and true cost. Request samples from Avi Chemicals today.

You get a quote that looks attractive. The price per kg is lower than your current supplier. You switch, run a few batches, and something is off — the shade is weaker, you are using more dye than the recipe calls for, and your actual batch cost has gone up. This happens more often than it should, and in most cases the cause is simple: nobody compared dye strength percentage before placing the order. Dye strength (%) is one of the most consequential numbers in dyestuff procure

Every season, millions of metres of jet-black cotton fabric move from dye houses in Tiruppur, Dhaka, and Ho Chi Minh City into garments that end up on shelves in Milan, Madrid, and São Paulo. The dye sitting at the centre of most of those supply chains is Reactive Black 5 (Reactive Black B) — a molecule so well-suited to cellulosic fibres that it has remained the dominant commercial black reactive dye for over four decades. Yet buyers who purchase it regularly — traders, buyi

You've just pulled 3,000 metres of dyed nylon carpet off the machine and the barré is visible under any light — horizontal banding, alternating light and dark stripes running across the full width, every reject roll costing you more than the entire dye batch combined. If you run a nylon carpet dye house, you already know exactly what that moment feels like. Nylon is acid dyes' single largest commercial application by volume. It is also, without question, the most technically

Two industries. One dye class. And more buyer headaches than either should have. If you manage procurement for a paper mill in Vietnam or a dye house in Bangladesh, you've dealt with it at some point — a shade that was spot-on in the trial run, then drifted noticeably in the third production lot. Or a liquid dye that started separating in the storage drum two weeks after delivery. Or a supplier who was reliable for eighteen months, then started cutting dye strength without te

You've spent hours getting your shade right, and then the next batch comes out two shades lighter. Or your nylon carpet runs are striping. Or your leather lot looks uneven under daylight. These are not processing errors — they are dye selection problems. And they are almost always preventable when you understand exactly what acid dyes do, how they do it, and which type your fiber and application actually calls for. The global market for acid dyes was valued at $2.19 billion

Brent crude moved from $72.48 on February 28 to $112.57 on March 27 — a 55% increase in 28 days. If you're a procurement manager placing Q3 dye orders right now, that number is not abstract. Benzene, the primary aromatic feedstock for most synthetic dye chemistry, jumped roughly 20% in the first two weeks of March 2026 alone. Diethylene glycol — critical to disperse dye formulations — surged 17% in Asia. And Saudi Arabia's Advanced Petrochemical Company declared force majeure