| abstract |
The problem of the present invention is that, for example, when exhibiting or storing metal products such as metals such as silver, copper, nickel, or alloys thereof, the metal products are particularly sulfur-containing gases such as sulfur oxides (SO x ), mercaptans, and hydrogen sulfides. It is to provide a discoloration preventing material of a metal to prevent discoloration by.n n n The solution of the present invention includes a fiber having a crosslinked structure and having a carboxyl group in the molecule, and at least a part of the carboxyl group is present as a salt of an alkali metal, alkaline earth metal or ammonia and has a reactivity with a sulfur-containing compound. Disclosed is a discoloration preventing material of a metal in which at least one fine particle of a soluble metal or a metal compound is dispersed. |