Acid Yellow 246 is a high-strength, anionic acid dye that produces a brilliant greenish-yellow shade with excellent leveling on protein and polyamide fibers. It is commonly used for exhaust dyeing of nylon (PA), wool, and silk, as well as for leather shading and paper coloration. The dye shows smooth build-up from pale to deep shades, good migration at the boil, and clean, bright tones that remain stable across the typical acid pH window used in dyehouses.
TRADE NAME:Acid Yellow 3R,Acid Yellow YTP
It performs best on polyamide (nylon) fibers and protein fibers such as wool and silk. It can also be used for leather shading and paper tinting, where a clean, bright yellow is required.
For exhaust dyeing, a pH of 4.5–5.5 using acetic acid or an acetate buffer is recommended. Run the dyeing cycle to the boil (98–100 °C) and hold up to 105 °C for deep shades with appropriate pressure equipment.
Yes. It has strong migration and leveling properties, helping reduce barre and streakiness on textured or non-uniform nylon substrates.
The dye exhibits smooth, near-linear build-up across common depth ranges (roughly 0.1–3.0% owf), enabling precise shade control in both apparel and carpet dyeing.
It can be blended with other acid dyes to fine-tune hue and brightness. When dyeing PA/elastane or PA/wool blends, follow the uptake profile of the more absorbent component and use appropriate leveling agents.
On nylon and wool, it typically achieves good wash and perspiration fastness for apparel. Lightfastness is application-dependent; for outdoor or carpet uses, consider aftertreatments or stabilizers as needed.
Leveling agents are recommended for critical shades, high denier yarns, or uneven substrates. They improve migration at the boil and help secure uniform shades across the lot.
Commercial grades are typically low in heavy metals, and APEO-free options are available. Always confirm with the supplied COA and compliance documentation for your region.
Yes. While optimized for exhaust dyeing, it can be adapted to continuous and print processes with controlled pH, appropriate thickeners, and fixation conditions.
For nylon exhaust dyeing: 0.5–1.5% owf Acid Yellow 246, bath ratio 1:10–1:20, pH 4.5–5.0, 1–2% owb leveling agent. Heat from 40 °C to the boil over 30–40 minutes, hold 30–45 minutes depending on depth, then rinse and neutralize.
