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topic 8514

How Do I Blacken Niobium?

affil. link
"Workbench Guide to Jewelry Techniques"
from Abe Books




I am looking to create a bio-compatible black finish (matt or polished) to small niobium parts (jewelry). I have heard this is done by heating with a torch then following a particular cooling process.

1) what types of gases are recommended
2) details of the cooling process
3) am I completely lost?!?
Adrienne Harvey
Maelstrom Studio Lab, Inc. - DeLand, Florida, USA

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