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Black brass

I need to stain or color cartridge brass deep black or deep blue... most of the commercial products available leaves blotchy results. Somewhat durable. Any help?

Mike Davis
T & M Surplus - Moses Lake, Washington, U.S.A.
2003

Black colour for brass:
1 lit ammonia ⇦ on eBay or Amazon [affil link] 25 %
200 gr basic copper carbonate ⇦ on eBay or Amazon [affil link]

Object must be grease and oxide free! Cold immersion(1-4 min.)!Needs strong ventilation or you can work outside! Diluted solution also works!

Budija Goran
- Zagreb, Croatia
2003

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