According to the invention, a deodorant which comprises at least one of germanium, antimony and bismuth compounds is used for a permanent waving agent consisting mainly of a mercapto compound. The deodorant is utilized by being contained in the permanent waving agent, or applied as a pretreatment agent before the permanent waving operation is carried out. By use of the above-mentioned deodorant, the production of hydrogen sulfide of "unpleasant odor" can be restrained.
Post permanent wave hair odor is reduced by treating the hair fiber with an aqueous bicarbonate/carbonate salt solution and then with an acidic aqueous solution. After allowing sufficient time for this lotion to penetrate the fiber, the acidic aqueous solution is directly applied to the fiber so that a reaction with the bicarbonate/carbonate salts occurs. This reaction results in the formation of gaseous carbon dioxide. Evolution of this gas from deep within, as well as the surface, of the fiber serves to release any trapped volatile malodorous mercaptans and byproducts.
A refrigerant/absorbent composition is disclosed which comprises an aqueous solution of at least one absorbent salt, present in an amount sufficient to provide utility of said composition as an absorbent, and at least one germanium compound, present in an amount sufficient to inhibit corrosion. Also, a method of inhibiting corrosion by adding a germanium compound to a refrigerant/absorbent composition is disclosed. Further, an absorption heat transferring machine having a working fluid which comprises an absorber salt, a germanium compound and water is disclosed.
