Acid Red 359 is a water-soluble acid dye designed to deliver bright, durable red shades on protein fibers (wool, silk) and polyamide (nylon). It combines high tinting strength and excellent exhaustion with reliable reproducibility across batch dyeing and continuous processes.
TRADE NAME:Neuter Red S-BR,Acid Red S-GN,Acid Red MS-GN,Neutrichrome Red S-JL
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
ISO | Wool | 5 | 4-5 | 5 | 6 | |
Acid Red 359 is optimized for protein fibers such as wool and silk and for polyamide fibers like nylon. It gives its best combination of color yield and fastness on these substrates; performance on cellulose (cotton) is limited unless used with a suitable binder or after-treatment.
Dissolve the dye completely in warm water before adding to the dye bath to avoid local overdosing. For industrial practice, prepare a concentrated stock solution at moderate temperature, filter if necessary, and add gradually under good circulation to the main bath.
Typical practice for wool and nylon is acid bath dyeing under mild acidic conditions (commonly pH ≈ 3–5) with controlled temperature rise and good liquor circulation. Exact temperature and time depend on equipment and recipe — follow your mill’s standard procedures or supplier recommendations for reproducible results.
When properly exhausted and rinsed, Acid Red 359 provides good washfastness on wool and nylon and moderate to good lightfastness. Fastness will improve with optimal fixation and suitable after-treatments specific to the end use (e.g., washing, leveling agents or UV stabilizers for outdoor uses).
Non-ionic leveling agents, buffering acids (acetic or formic acid at controlled doses), and salt management strategies typically improve exhaustion and leveling. The best auxiliary package depends on fiber type, machinery and shade depth — we recommend small trials to optimize formulations.
Handle Acid Red 359 with appropriate PPE (gloves, eye protection, dust mask for powders). Follow local wastewater regulations: remove unfixed dye by conventional wastewater treatment or dye recovery methods before discharge. Consult the product SDS for detailed hazard, handling and disposal instructions.
It is commonly supplied as powder, granules or liquid concentrates. Store in a cool, dry place away from strong oxidizers and direct sunlight. Keep containers tightly closed and use within supplier’s recommended shelf life for best performance.
Begin with a laboratory scale sample: choose a conservative starting dose based on desired shade depth, perform a small trial with your chosen auxiliaries, then scale up after confirming color match and fastness. If you provide target L*a*b or Pantone references, the supplier can often recommend an initial dosage and recipe.
