Potassium permanganate is very desirable for oxidative treatment of denim. When applied in a solution an even fading is obtained, and when impregnated into an inert porous material it provides a desired random uneven oxidation of colorbodies when tumbled with fabric ("rocking"). Unfortunately, dark colored, insoluble manganese dioxide is deposited on the denim resulting in a dirty, stained appearance. The manganese dioxide can be removed by a process called "neutralizing", that is, reducing the manganese dioxide to soluble manganous salts, usually by sulfites, thiosulfate, hydroxylamine and the like. These reducing agents must be used in a large excess and at a pH of 2.5 to 3.0 causing damage to the cotton fibers. The excess reducing agent from the neutralizing step is very undesirable to dispose of because of its very high toxicity and high chemical oxygen demand.

MASMOVER are special chemicals to remove manganese dioxide from denim fast and effective, low toxicity. After neutralizing the denim is frequently "brightened" or bleached to enhance the contrast between the dyed and the decolorized areas.

Appearance	White powder.
Chemical nature	Masmover A: surfactants, complex agents, Reducing agents Masmover B: Acidity provider and buffer
Ionicity	Anionic
pH	3-5
Solubility	Soluble in water
Solid content	100%
Compatibility	Is not compatible with alkaline products.
Storage	Store in a dry place in original closed packages. A and B must be stored separately. When properly stored shelf life is 12 months at least.

1. Remove manganese dioxide from denim fast and effective, low toxicity.

2. Shorter processing time and low treatment temperature, no heating of washer is needed

3. Improved contrast look and whiteness of stone-washed denim garments

4. No yellowing even after long time storage or wearing

5. Low cost

1. One hundred twenty (about 100 kg) "rocked" jeans are added to a 200 kg capacity washer.

2. Washer is filled to low level with cold water to maintain a goods to liquor ratio of 1:20 or less, 1-1.5kg MASMOVER A is added, the garments are agitated 4 minutes and 1-1.5kg MASMOVER B was added.

3. The garments were agitated further 10-20 minutes and drained.

4. Then rinse cold is repeated and garments are extracted.