Characteristics
Appearance: Uniform red-and-white powdery granules
Specific gravity: 0.9 ± 0.1
pH: 4.5 ± 0.5 (1‰ aqueous solution)

Application
1. Effectively acts on indigo dyes and also exhibits a certain degree of activity against reactive and sulfur dyes.
2. Quick processing—no heating required, no bleaching needed.
3. Gentle bleaching to maintain fabric strength and elasticity.
4. After enzyme washing, further treatment with a cold-bleaching enzyme can achieve a stone-washed effect with crisp, well-defined fabric texture.
5. Emergency Treatment for Color Bleeding After Denim Washing
6. Impart a distinctive washed look to the garment

Reference Process

Enzyme dosage: 0.3–1.0 g/L
Bath ratio: 5:1–12:1 L/kg (water to fabric)
Processing time: 5–20 minutes (specific duration depends on processing requirements).
Operating temperature: 20–35°C; optimal temperature: 25–30°C.
pH: 4.5–5.5 (no adjustment needed)

Operating Requirements

1. Dosage: Adjust the dosage according to the water level; typically 0.3–1.0 g/L (i.e., 0.3–1.0 kg per 1,000 L of water). The exact dosage should be determined based on the desired degree of bleaching.
2. Temperature: 20–35°C; optimal range: 25–30°C (water temperature in summer generally meets this requirement, so no heating is necessary).
3. pH: When the dosage of this product is 0.5 g/L, the pH is optimal. If the dosage is too low, the pH may be too high; if the dosage is too high, the pH may be too low. It is recommended to add the enzyme to the water-washing machine and then use precision pH test paper to verify that the pH is within the optimal range of 4.5–5.5. If the pH falls outside this range, it can be adjusted to the optimal level using glacial acetic acid or sodium carbonate.
4. Precautions when adding cold-bleaching enzyme:
4.1. Since cold-bleaching enzymes become active immediately upon contact with water, they must not be pre-dissolved in water before being added to the washing machine; instead, the solid cold-bleaching enzyme should be added directly to the machine. This differs from bleaching agents and potassium permanganate, which must be diluted in advance.
4.2 When adding solid cold-bleaching enzyme to the washing machine, the enzyme must be added while the machine is running; otherwise, the garments that come into direct contact with the enzyme will be bleached first, resulting in uneven bleaching. This principle is the same as when adding bleach solution and potassium permanganate—both must be introduced while the washing machine is in operation.
5. Reaction time: Bleaching is completed within 20 minutes; after 20 minutes, the efficacy of the cold-bleaching enzyme gradually diminishes.
6. Post-bleaching treatment: If the fabric exhibits a reddish tint after bleaching, it is recommended to add 1–2 g/L of sodium carbonate, adjust the water temperature to about 30°C, and rinse for 5–10 minutes. Follow this with two additional rinses with clean water to ensure the fabric surface is thoroughly clean and visually appealing.

Precautions

Since cold-bleaching enzyme becomes active immediately upon contact with water, all sampling must be performed using dry beakers, or the ingredient-weighing staff should weigh the required amount and package it in plastic bags for use by production workers. It is recommended to weigh only the amount needed at any given time, and to ensure that the bags are tightly sealed when not in use, as moisture absorption can impair the enzyme’s performance.

Cold-bleaching enzyme PM-200 is a brand-new low-temperature bleaching enzyme formulation that introduces innovative approaches to fashion creation and delivers user-friendly, environmentally friendly new processes. With a more distinctive style than the first-generation laccase, it can also produce unique effects on dyed apparel made from active dyes.