Direct Dye

Direct Dye from Ophtha Dye is an anionic, water-soluble dye applied directly to cellulosic fibers without requiring a mordant. It is formulated for cotton, viscose, jute, linen, and rayon, and is also used on silk and wool to achieve bright, cost-effective shades. The dye molecules bond physically to the fiber through hydrogen bonding and van der Waals forces, not covalent linkage, resulting in moderate wash fastness that requires aftertreatment for durability.

The product range includes 18 standardized C.I. dyes such as Direct Yellow 11, Direct Red 23, Direct Blue 71, and Direct Black 22, each with assigned Color Index numbers. These dyes are typically supplied as powders with 85% to 95% purity, dissolved in water with sodium chloride or sodium sulfate as electrolytes. The dyeing process occurs in neutral to slightly alkaline baths at 80°C to 95°C. The dye exhibits good light fastness on cotton, with ratings between 4 and 6 on the Blue Wool Scale, depending on the shade and concentration.

This dye is primarily purchased by textile mills in Bangladesh, Vietnam, and Egypt for mass production of low-cost apparel and home textiles. Buyers in the Middle East and Africa source it for dyeing cotton yarns and woven fabrics. Packaging is in 25 kg HDPE bags with inner polyethylene lining; bulk container loading is available. MOQ is 100 kg, and lead time is 15 to 25 days after order confirmation. Incoterms offered are FOB Mumbai or CIF port of destination.

Ophtha Dye is based in Ahmedabad, Gujarat, India, with a registered address in the Naranpura industrial area. The supplier is classified as harbor-trusted, indicating verified export documentation and customs compliance. The listing does not state years in business, workforce size, or production capacity. It does not claim certifications such as OEKO-TEX, GOTS, or ISO 14001, nor does it list laboratory testing results or client references. The focus is on product range and application, suggesting a manufacturer focused on bulk dye supply rather than branded marketing.

There is no public information on in-house R&D, dye synthesis facilities, or environmental controls. The supplier has a 0.00% response rate and zero average response time, indicating automated order processing or third-party fulfillment. Buyers should request batch-specific certificates of analysis for each shipment, as dye composition can vary between production runs. No OEM or custom shade development services are mentioned.