Hesparus-
Thanks for the clarification on Shibuichi, and for mentioning those arsenic alloys- I had never heard of them. Do you know what Sentoku is? Always wondered about that one.
I've seen Shakudo and Shibuichi used in modern knives, but mostly only by those working in the Japanese tradition, or inspired by the Japanese style. Sounds like you're already set up with your own, but for anyone else interested in the stuff, it's available online at
Reactive Metals Studios. Those of you who don't like the look of "tarnished" metal may not be interested in intentionally creating a patina, but all kinds of neat colors are possible. Deep purple to black, grays, green, olive green, sky blue, etc.
edit: I should have Googled before asking. I found a really
neat site on Naginata that gave the compositions of several more types of "bronze".-
"By the 18th century, metals such as gold, silver, and the copper alloys of shakudo (30% - 70% gold), shibuichi (25% silver), sambo gin (33% silver), rogin (50% - 70% silver), karakane (a Chinese metal consisting of approximately 20% tin and lead), and sentoku (10% tin and zinc) were also used, primarily as decorative inlays in the tsuba. The application of various proprietary chemical compounds to these precious metals gave them a wide variety of colors."