Sulfur dyes meet seamless dissolution:
Sulfur dyes are water-insoluble. In the presence of a reducing agent and at alkaline pH at elevated temperature of around 80 °C, the dye particles disintegrate, which then become water-soluble and hence can be absorbed by the fabric. Sodium sulfide or sodium hydrosulfide are suitable reducing agents. Common salt facilitates the absorption. After the fabric is removed from the dye solution, it is allowed to stand in air whereupon the dye is regenerated by oxidation. The regenerated parent dye is insoluble in water. Oxidation can also be effected in air or by hydrogen peroxide or sodium bromate in a mildly acidic solution.
DENOL RZID:
DENOL RZID is a high-power reducing agent specifically developed for the reduction of sulphur dyes on cellulosic substrates through continuous and exhaust applications in the textile industry. This product is APEO (Alkylphenol Ethoxylates) and Phosphate-Free, ensuring an eco-friendly and spotless sulphur dyeing process.
BENEFITS:
- GOTS & ZDHC Level – 3 approved.
- Cost-effective alternative to sodium sulphide flakes.
- Improve dye penetration.
- Gives better dyeing yield.
- Ensures uniform controlled dye reduction thereby helping achieve desired color yield.
- Prevents premature oxidation during dyeing leading to better dye bath stability.
- Improves fastness properties of the fabric.
Characteristics |
Benefits |
|---|---|
| Gives better dyeing yield | Provides a red tone to the fabric making the colour look darker. |
| Easily soluble in water. Does not leave any residue | It transforms dye into water-soluble forms known as thioindigo or sulfurized indigo. These water-soluble dyes can then easily penetrate the textile fibers. |
| Prevents unwanted deposition/precipitation of dyestuff and dye bath auxiliary chemicals | Ensures uniform controlled dye reduction thereby helps achieve desired colour yield. |
| It ensures that the dye molecules properly attach to the fiber, resulting in good colour fastness and durability | Prevents premature oxidation during dyeing leading to better dye bath stability. |
| Non-Toxic | It is non-toxic, reducing risk for worker who handling this, no produce hazardous by-product. |
Properties:
CHEMICAL CONSTITUENTS
Polymeric sulphide.
IRON CONTENT
Nil.
COLOUR
Orange to yellow clear liquid.
pH. (as such)
12 +/- 1
DENSITY
Approx. 1.0 g/cm3
SOLUBILITY
Soluble in water cold water.
ECOLOGY AND TOXICITY
The usual hygiene and safety rules for handling chemicals should be observed in storage, handling and use. The product must not be swallowed.
Application:
- For liquid sulphur dyes: DENOL RZID 1 : 0.8 – 1.0 (Weight of dyes)
- For powder sulphur dyes: DENOL RZID 1: 1.3 – 1.5 (Weight of dyes)
- DENOL RZID 15 – 30 gpl (depending on depth of dyeing)
FAQS
Cutting-Edge Fashion & Textile Solutions
DENOL RZID acts as a concentrated high-power reducing agent that converts sulfur dyes into water-soluble forms, ensuring deep color penetration and even dyeing on cellulosic fabrics.
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