Back Staining, Anti Back Staining, Anti Back Staining Agents

Discussion:

On analysing the oxidising agents used in this study we found that hydrogen peroxide proves to be the safest anti back staining agent than the rest. The hypochlorite imparts some yellowness after being kept for a long time and is also toxic in nature. The potassium permanganate also imparts a slightly yellower tone. But peroxide gives a brighter look and gives better results at very low concentrations. The working of the peroxide as an anti back staining agent is very simple. Say, when the denim garments are in the bath its pH will be slightly alkaline. So this helps the peroxide to start liberating nascent oxygen thereby helping in anti back staining activities. So, this way the denim garments are imparted with a good salt and pepper effect than with other anti back staining agents.

Epilogue:

The project results, samples and the photographs indicate that usage of oxidising agents like potassium permanganate, sodium hypochlorite, hydrogen peroxide in the enzyme bath provide good anti back staining properties. It was found that hydrogen peroxide was performing well as an anti back staining agent with dosage between 0.5 to 1.0%. This also proves to be the most cost-effective anti back staining agent. In both dosages it has imparted good anti back staining results. The results were compared with normal biofading enzymes treated with and without anti back staining agents. The dosage has to be worked out for different denim substrates depending upon the shade and customer requirements.

About the Author:

The author is the student of Final Year-M Tech; SSM College of Engineering; Affiliated to Anna University, Chennai.

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