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Super Product Mix

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Description
SPM is a powdered stable compound, which dissolves in water and decomposes gradually to produce sulfoxylic acid through formamidine-sulfinic acid to exhibit a reducing action. This reaction is promoted by the application of heat or in the presence of an alkali, and a strong reducing action is thereby exhibited. But, this reaction is slow, and particularly in an acidic to weakly alkaline region.

SPM is a strong reductant which re-arranges under alkaline conditions to form formamidine sulphinic acid. This product is used in leather processing industry, paper, pulp and board industry, photographic industry, textile processing industry, bleaching and reducing agents. This product is also a component of decolorisation agents. SPM has been very effective as a reducing agent for reduction cleaning (RC) in the textile industry.

In the dyeing of fibrous products using oxidation-reduction dyeing type dyes such as vat dyes and sulfur dyes, it is sodium hydrosulfite (hereinafter referred to simply as "hydrosulfite") that has heretofore been mainly used as a reducing agent. However, hydrosulfite is poor in preservative stability and undergoes an oxidative decomposition to a large extent upon contact with air, for which reason it is an actual situation that hydrosulfite is used in large excess amount as compared with a theoretically required amount. Such decomposition of hydrosulfite is specially remarkable in a continuous pad dyeing, in which the decomposition proceeds to a remarkable extent during a short period of time from the padding of a reducing solution on the cloth until steaming. Moreover, when handling, hydrosulfite produces a bad smelling gas; therefore, also in point of public nuisance based on a bad smell there has been a demand for a reducing agent free from smell.
SPM, is available as a white powder superior in preservative stability and having neither oxidizing property nor reducing property, but displays reducing property when an aqueous solution thereof is made alkaline or heated. Its reducing power is very large, stability in an aqueous alkali solution is good and decomposition by an air oxidation is less remarkable, with little production of a bad smell. Thus, SPM is an excellent reducing agent. For this reason, application of SPM to various fiber fields including dyeing, printing, discharge printing and reduction clearing has been demanded increasingly. Oxidation-reduction dyeing using SPM boasts of following advantages.

* High brightness, good brightness stability
* Maximum pulp strength at minimum cost
* Minimum environmental pollution
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