TRADE NAME:Acid Red ARL,Acid Red F-2G,Acid Red FRL,Acid Red GN,Acid Brilliant Red 2G,Acid Red E-FRL,Kiwacid Red FRL-E,Nylanthrene Red B-NG,Nylosan Red E-2GN,Rifa Acid Fast Red N-FRL,Red MP-G,Telon Red FRLL,Triacid Light Red 4G
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
ISO | Wool | 4 | 4-5 | 5 | - | 5 |
Test Methods | fiber | seawater | potting | Perspiration | Sun exposure | ||
discolor | Staining | discolor | Staining | ||||
ISO | Nylon | 5 | 4 | 4 | 4~5 | 5 | 5 |
soaping ISO105-C06-B2S (50℃ | Flooding ) ISO105-E01 | Alkali perspiration ISO105-E04 | Sun exposure ISO105-B02 | friction ISO105-X12 | ||||||||
discolor | Nylon stain | Cotton stain | discolor | Nylon stain | Cotton stain | discolor | Nylon stain | Cotton stain |
0.5% (owf) |
2.0% (owf) | dry | wet |
4 | 4~5 | 3~4 | 5 | 5 | 5 | 4~5 | 4~5 | 4~5 | 6 | 6 | 5 | 5 |
Mainly used for sea of target that fluorescent, facilitate aerial reconnaissance search. And can use significantly for the exploration of fluorescent groundwater. Can also be used for medicine and cosmetics shading, rarely used for silk printing and dyeing things.
Begin with a thoroughly wetted fibre and add the dye to cool or warm water with gentle circulation before acidifying. Maintain constant agitation during the temperature rise and avoid local overdosing of dye. Use a small amount of a leveling agent and control pH slowly to promote uniform exhaustion.
Typical dyeing runs well at pH ≈ 4.0–5.0. For wool, raise temperature gradually to about 85–95°C depending on fibre quality; for nylon, 70–90°C often suffices. Exact settings depend on fibre preparation — always trial on a sample and record results.
After exhaustion, mild acidification plus a warm rinse helps remove unfixed dye. For wool, a short acid rinse followed by a protein-safe leveling rinse improves wet and wash fastness. For applications needing higher lightfastness, consider protective topcoats or UV absorbers rather than additional dyeing steps.
Yes — Acid Red 337 is suitable for leather dyeing (acid bath or penetration dye systems) and for aqueous ink formulations where acid dyes are appropriate. For leather, control penetration and after-treatment to avoid surface streaks. For inks, confirm compatibility with your vehicle and binder system and test bleed and migration.
Use a standardised lab recipe and record depth (% shade) vs. grams per litre. To deepen shade, increase dye concentration in small increments; to soften, add a controlled amount of a complementary dye or use a dilution batch. Small bench trials and spectrophotometric readings speed reproducible matching.
Acid dye baths can carry dissolved ionic load and residual colour. Reduce salt and auxiliary usage where possible, capture and test effluent for local discharge limits, and consider physico-chemical or biological treatment tailored for anionic dye residues. Work with suppliers on lower-salt exhaustion recipes to lower wastewater impact.
Store in a cool, dry place in tightly closed containers away from strong oxidisers. Minimise moisture ingress. Under recommended conditions the product is stable for typical inventory periods; always check batch certificate and perform a small quality check on long-stored material before critical runs.
