To provide an extremely easily treatable pollution-free composition for precious metal clay which barely sticks to hand, has a moderate water-retention and stickiness, a strong adhesive strength, excellent moldability and a high dry strength, is hard to be cracked and can be re-kneaded.
As a noble metal powder used for the composition for precious metal clay, the one subjected to surface treatment with higher fatty acid and/or a higher fatty acid salt is used, and, as a binder to be kneaded therewith, a glue-containing organic binder aqueous liquid or a curdlan-containing organic binder aqueous liquid is used. Into the organic binder aqueous solution, glue is incorporated preferably in the ratio of 0.1 to 5.0 wt.% by a solid content, and curdlan is incorporated preferably in the ratio of ≥1 wt.% by a solid content.
Noriko Murata
Shuji Tokuoka
Hiromitsu Shigemoto
Naoko Oozumi