FIELD: chemistry.
SUBSTANCE: described is a composition for cleaning the surface of soft and porous semiprecious stones, which contains: a) a water-soluble alkali and alkali-earth metal salt in total amount of 3.4-3.6 wt %, selected from salts present in seawater; b) one of α-amino acids in total amount of 0.5-2.0 wt %, selected from 18 amino acids present in pearl; c) a nonionic surfactant in total amount of 0.5-1.0 wt %; d) a preservative in total amount of 0.1-0.25 wt %; e) water - the balance. The disclosed composition has potential for use in the jewellery industry, in museum restoration workshops, in antique and jewellery stores and in preparing jewellery exhibitions.
EFFECT: giving an article lustre without destroying the surface structure.
2 cl, 2 tbl, 26 ex
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