Premium Sulphur Blue CV Dye with Excellent Light Fastness

I. Addressing Customer Pain Points, Applicable to a Wide Range of Scenarios

Sulphur Blue CV is specifically designed for dark dyeing of cellulosic fibers (cotton, linen, viscose, and their blends). It effectively solves the problem of ordinary blue dyes fading easily under sunlight exposure—its lightfastness reaches Grade 6, far exceeding the industry average. Whether making workwear, tents, or sunshade fabrics for long-term outdoor use, or denim and home textiles requiring high lightfastness, it maintains rich color and stays looking new for a long time. At the same time, the product performs consistently in terms of ironing fastness (Grade 4), reducing color loss during post-processing and helping customers reduce rework rates.

II. Differentiated Highlights to Attract Customers

Compared to similar sulfur blue products on the market, our Sulphur Blue CV has three outstanding advantages:

Superior Lightfastness : Even under strong sunlight, it is not prone to whitening or discoloration, making it particularly suitable for textile orders exported to high UV-affected regions such as the Middle East and Southeast Asia.

Vibrant and Deep Color: The color ranges from sapphire blue to deep blue, with high dye uptake. Only 150% strength is needed to achieve the desired depth, saving on dye usage.

Environmentally Friendly: The product meets international environmental standards (Eco-Friendly), is free of banned aromatic amines, and meets the access requirements of European and American buyers.

III. Why Choose Our Product Over Others?

Consistent Quality: We employ strict production processes and batch control. The color, strength, and fastness data for each batch of sulfur sapphire blue are traceable, avoiding variations in dyeing batches.

Professional Technical Support: The company provides full-process technical guidance, from dyeing formula optimization to post-processing, helping customers quickly solve problems such as uneven dyeing and insufficient fastness.

Global Export Experience: Our products have been stably exported to many countries and regions. Packaging, transportation, and customs documentation are mature and reliable, ensuring on-time delivery.

Outstanding Price-Performance Ratio: Our prices are more competitive for the same lightfastness rating, and we can provide free sample testing to reduce your procurement risk.

Parameter Value

Product Name Sulphur Blue CV (硫化宝蓝 CV)

Strength 150%-180%

Light Fastness Grade 6

Wash Fade Fastness Grade 2-3

Wash Stain Fastness Grade 2

Iron Fastness Grade 4

Additional Notes:

All fastness tests follow international ISO or AATCC standards。

This product is a sulphur dye suitable for cellulosic fibers (cotton, linen, viscose, etc.) via exhaust or pad dyeing processes. It offers excellent light fastness, while moderate wash fastness (fade/stain) is inherent to sulphur dye chemistry and can be improved with after-treatments (e.g., oxidation, fixing agents).

The Iron Fastness Grade 4 indicates minimal color change or staining during hot pressing, making it very suitable for garment manufacturing.