Japanese alloys

Hello, The discussion about purple gold made me remember a
reference about Japanese metal craftspeople using many different
alloys to achieve various colors the way that we use patinas.
Does anyone know of a good book, in English, on the subject? I
would also appreciate favorite formulas. I made patterned chain
mail mixing shibuichi and sterling jumprings last spring and
loved the color contrast.

Thank you,

Pauline, I just ordered some things from Bryant Labs and they
sent several pages of patina formulas along with their catalog.
ph. 510-526-3141

Marilyn Smith