Acid Red 52 is a water-soluble acid dye formulated for protein and polyamide fibers and for specialty applications in inks and certain coatings. It offers bright red shade potential, reliable wet-fastness when correctly fixed, and predictable performance in low-pH dye baths. Acid Red 52 is designed for controlled exhaustion dyeing and spotting applications where uniform shade and good reproducibility between batches are required.
Acid Rhodamine B,Acid Rose B
Mainly used for wool, silk and polyamide fiber dyeing, also can be used for wool and a variety of fabric dyeing, still can be in wool and silk fabric printing directly, also can used for leather dyeing.
Leveling(grade) | Displacement | Whitening | Solubility(g/L) | Metal ion effect(grade) | ||
copper | iron | chromium | ||||
5 | A | Very bad | 200(100℃) | 3 | 4 | — |
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 | 1 | 2 | 2 | — | — | — | — | 3 | 3 | 3 | 2~3 |
ISO | wool | 3~4 | 3 | 1 | 1 | 1 | 3 | 3 | 1 | 2 | 1 | 3~4 | 3 | 4 | 3 |
Acid Red 52 is optimized for protein fibers (wool, silk) and polyamide fibers (nylon). It produces the most consistent results on pre-scoured, neutral-to-acidic substrates. For synthetic blends, pretesting is recommended to check affinity and shade.
Acid Red 52 typically shows moderate lightfastness and good-to-moderate washing/wetfastness when correctly exhausted and post-treated. Exact fastness grades depend on substrate, shade depth and fixation method; deeper shades often display slightly reduced lightfastness compared to pale shades.
Yes — Acid Red 52 can be adapted to continuous exhaustion and padding processes, but recipe and pad liquor pick-up must be optimized. Continuous applications generally require a narrower pH and temperature window and close control of liquor pickup to maintain reproducible shade and fastness.
Begin with a lab-scale exhaustion trial at the target liquor ratio and a standardized shade recipe. Use spectrophotometric measurements (e.g., ΔE analysis) to compare with the target and iteratively adjust percent owf, pH, and auxiliaries. For production-level matching, request a lab sample or small trial batch and document the final recipe for reproducibility.
Yes, Acid Red 52 can be formulated into aqueous inks and some coatings where water-soluble acid dyes are acceptable. Compatibility depends on binder chemistry and required fastness; testing for bleed, migration and binder compatibility is essential before scale-up.
