Acid Green 16 Appearance is dark green powder, soluble in water, blue-green, soluble in ethanol, green, yellow-brown in concentrated sulfuric acid, yellow after dilution.
TRADE NAME:Acid Green V,Acid Green SIM
Leveling(grade) | Displacement | Whitening | Solubility(g/L) | Metal ion effect(grade) | ||
copper | iron | chromium | ||||
3~4 | B | can~good | 20(90℃) | 5 | 5 | — |
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali fluff | Acid fluff | potting | soaping | Perspiration | Sun exposure | ||||
discolor | Staining | discolor | Staining | discolor | Staining | discolor | Staining | ||||||||
AATCC | wool | 2 | 3~4 | — | 1 | 2 | 2 | — | — | — | — | 2~3 | 2~3 | 3~4 | 2 |
ISO | wool | 2~3 | 3 | 3~4 | 1 | 1 | 1 | 3~4 | 1 | 1 | 1 | 3 | 3 | 4~5 | 3 |
Acid Green 16 is optimized for protein fibers (wool, silk) and shows good uptake on nylon under acidic dyeing conditions. It is not suitable for untreated cotton or cellulose fibers unless used with a dye-fixing system or pretreated substrate — for direct cotton dyeing, choose reactive or direct dyes instead.
Run dyeing in an acidic bath with controlled pH and gradual temperature rise. Typical practice is to add the dye at lower temperature and raise the bath steadily so the dye exhausts uniformly; use recommended leveling agents and avoid sudden pH jumps. Always validate on lab-scale first — machine and liquor ratio changes materially affect exhaustion.
To deepen shade while maintaining levelness, increase dye concentration incrementally and extend the uptake period rather than raising temperature quickly. Add a small amount of leveling agent and ensure consistent agitation. If streaking appears, reduce liquor ratio or slow the temperature rise and re-test.
Expect moderate to good wash and rub fastness for typical textile uses; lightfastness is usually moderate and depends on substrate and finishing. Improve fastness by post-dyeing treatments: neutralizing residual acid, thorough rinsing, and applying appropriate wet-fastness or light-stability finishes tailored to the end product.
Store in a cool, dry place in tightly closed containers away from strong oxidizers. Because acid dyes are water-soluble, avoid moisture ingress. Use appropriate PPE when handling powders or concentrates and follow local regulations for storage and disposal.
Acid Green 16 can be used in both batch (exhaust) and properly configured continuous/semicontinuous systems, but continuous lines require careful control of liquor ratio, pH feed, and tension to avoid streaking. Run pilot trials to tune feed rates and auxiliary dosing before full production runs.
