1. Basic Information
– Product Name: Reactive Blue GF‑HWBB
– Type: HW‑series high wash fastness reactive dye (bifunctional)
– Appearance: Bright turquoise‑blue fine powder
– Applicable Fibers: Cellulosic fibers — cotton, viscose, linen, rayon
– Recommended Processes: Exhaust dyeing, pad dyeing, cold pad‑batch, printing
2. Key Features
– Superior wash fastness — HW grade, excellent resistance to repeated washing
– Brilliant turquoise shade — bright, clean blue tone with good build‑up
– High fixation & reactivity — strong covalent bonding, low unfixed dye
– Good solubility — ≥100 g/L at 50 °C, easy dissolution
– Excellent fastness — light, washing, perspiration, rubbing fastness
– Good leveling & reproducibility — uniform dyeing, stable batch-to-batch
– Eco‑friendly — meets Oeko‑Tex Standard 100, low salt requirement
3. Typical Fastness (on cotton)
– Light fastness: 5–6 (Xenon, 1/1 depth)
– Washing fastness: 4–5 (change), 4–5 (staining)
– Perspiration fastness (alkali): 4–5
– Rubbing fastness (dry/wet): 4–5 / 4–5
– Wash fastness (repeated): 4–5 (key HW advantage)
4. Application
– Main Uses: Dyeing and printing of cotton, viscose, and blends
– Ideal for: High‑grade apparel, home textiles, towels, knitted fabrics
– Best for: Products requiring high wash durability (e.g., bed linens, activewear)
