Pigment Red 21

Company Profile:

Located in Shaoyang City, Hunan Province, we are a professional manufacturer of high-quality iron oxide pigments.

\With advanced production facilities and strict quality control, we focus on providing stable, reliable, and cost-effective coloring solutions for global customers.

COA Information (Based on Z20250216 Standard):

Test Item	Standard	Result
powder color	bright red powdeer	approximate
coloring powder(%)>	100	102
moisture content(%)<	1.5	1.3
oil absorption value(%)	30-40	38
PH of Water Extract	6-8	7
sieve residue(20 mesh)<	5%	4%
light resistance>	level 6	level 7
heat resistance	120℃	120℃

Conclusion: Passed – Conforms to Z20250216 standard.

Applications:

· Coatings & Paints – Industrial paints, baking finishes, powder coatings, water-based paints, architectural coatings
· Printing Inks – Offset inks, water-based inks, solvent-based inks, surface printing inks
· Plastics – PVC, polyethylene (PE) processing, plastic masterbatch (heat stable up to 120°C)
· Leather & Textiles – Leather dyeing, textile printing paste, fabric coloring
· Other Uses – Stationery (ink pads, chalk), cosmetics (soaps, candles), paper coloring, rubber products

Process Advantages:

· Advanced azo coupling reaction technology for consistent and stable product quality
· Strict control of reaction temperature and pH to ensure fine and uniform particle size
· Excellent dispersion performance in both water-based and solvent-based systems
· High tinting strength and good hiding power
· Good acid and alkali resistance
· Good light fastness (Grade 7) suitable for indoor and limited outdoor applications
· Low moisture content and controlled oil absorption for easy processing
· Non-toxic and environmentally friendly, suitable for industrial and cosmetic grades