Acid Green 28 appearance is a brilliant blue powder, which is yellowish brown in concentrated sulfuric acid. After dilution, it turns blue. The aqueous solution is blue in color, and the color is unchanged after adding hydrochloric acid, but there is precipitation, and sodium hydroxide has a blue precipitate.
TRADE NAME:Acid Green SG,Aminyl Green F-3GL,Akacid Brilliant Green F-6GL 200%,Best Acid Milling Green 5GW,Dorasyn Green C3G 200%,Leadacid Green GLS 200%,Orco Nylosol Green 6-GLS
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
ISO | Wool | 3-4 | 3-5 | 4-5 | 4-5 | 6 |
Application characteristics(grade) |
Displacement |
Whitening |
Solubility(g/L) | Metal ion effect(grade) | ||
copper | iron | chromium | ||||
3~4 | D | bad | 90(90℃) | 4~5Y | 4~5Y | 2Y |
Test Methods | fiber | Test Methods | Carbonization | Chlorination discoloration | Oxygen bleaching | Oxygen bleaching | Acid fluff | potting | soaping | Perspiration | Sun exposure | ||||
discolor | Staining | discolor | Staining | discolor | Staining | discolor | Staining | ||||||||
ISO | wool | 4~5 | 5 | 5 | 4~5 | 4~5 | 4~5 | 4 | 4~5 | 5 | 1 | 3~4 | 4~5 | 4~5 | 6 |
Used in mulberry silk, polyamide, wool fabric and the tussah dyeing and printing, but also can be used for leather dyeing.
Acid Green 28 is optimized for protein fibers (wool, silk) and synthetic polyamides (nylon) because these fibers have cationic sites under acidic conditions that bind anionic acid dyes strongly. It gives the brightest, most durable shades on these fibers compared with cellulose fibers.
A typical starting point is pH 2.5–4.5 (adjust with acetic acid or formic acid). Temperature depends on the fiber: gentle dyeing at 50–60°C can be used for delicate silk; 80–95°C is common for wool and nylon to improve exhaustion and leveling. Always follow lab-scale trials before production-scale runs.
Dosage depends on requested depth: for light shades 0.1–0.5% owf (on weight of fabric), medium 0.5–1.5% owf, and deep shades 1.5–3.0% owf. These are starting guidelines — actual usage should be confirmed by sample dyeings because liquor ratio, auxiliaries and machinery affect final shade.
On wool and nylon, Acid Green 28 typically shows moderate to good wet-fastness and reasonable perspiration fastness when properly fixed and rinsed. Lightfastness is usually moderate for most acid greens — consider using protective topcoats or selecting a blend with higher lightfast dyes for outdoor applications.
Yes — Acid Green 28 mixes well with other acid dyes to produce a wide range of greens and blue-greens. For accurate reproducibility, prepare small lab trials and match recipes by weight rather than visual approximation. Check compatibility and fastness of the final blend.
Store in a cool, dry place away from strong acids and oxidizers. Use appropriate PPE (gloves, eye protection, dust mask for powders). Avoid inhalation of powder and follow local regulations for waste and effluent disposal. Keep containers tightly closed when not in use.
It can be used for leather and certain paper applications, but formulation and fixation methods differ from textile dyeing. For leather, consult leather-dye specialists to ensure penetration and fixation; for paper, consider pH and binder compatibility to avoid migration or bleeding.
Use appropriate leveling auxiliaries, control the temperature rise rate, maintain consistent liquor ratios and pre-wet goods evenly. Slow addition of dye, proper mechanical action, and sequestering hard-water ions help improve evenness. Pilot runs and incremental adjustments produce the best outcomes.
