Antiback Staining Agent
Anti back staining agents mostly comprise of three substances – dispersing agents, chelating agents, and emulsifying agents. All these must be of a particular concentration in order to inhibit the adherence of indigo dyes on the white portions of denim garments. Most of these anti back staining agents are highly efficient in soft water, but in hard water they might be less effective and so the dyes will re-deposit. This is so because hard water contains salts, called the electrolytes (exhausting agents), which help indigo dyes to soil faster. Nowadays, anti back staining agents contain sequestering agents as well, so that they can be used in hard water. Acid liberating agents are also used along with anti back staining agents to reduce the alkaline conditions and enhance the enzyme activity.
As a latest innovation we have anti back staining agents made from polyglycol ether derivatives and polymer phosphates. This is an inbuilt sequestering agent, which can be used more effectively in hard water.
One of the safest modes of anti back staining is the enzymatical way, where some enzymes, like the cutinase enzymase and other lipolytic enzymes are also used as anti back staining agents. All these efficiently reduce back staining, but are costlier too. Some anti back staining agents are used as afterwashing agents, which have very high emulsification power.
Another way of avoiding back staining is by using oxidizing agents. According to the chemistry of back staining, it is caused by the formation of glucose during stone or enzyme washing of the denim garment. This glucose is the reducing agent and it helps the indigo dye to exist on the white part of the denim, thus reducing the contrast of the garment. Now these oxidizing agents will act on the glucose and decrease its reducing power and enable zero back staining. These are the bleaching agents such as hypo chlorites, permanganates, peroxides, etc. There are some mild oxidizing agents also, which are called Resist Salts.
|Daledisperse-BRM||Specially designed Anti-back staining agent for indigo washing. This product performs well on broad PH ranges.|
|Daledisperse-DNV Conc||This product exhibits excellent Anti-back staining properties & can be diluted to 1:3 ratio with water.|
|Daledisperse-AZA||Special dispersing agent for all types of fabric s specially for indigo-dyed denim. This product is resistant to water hardness.|
|Daledisperse-COS||A very cost-effective Anti-back staining agent for all types of fabric.|