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:gaah: I forgot to mention toxicity.
Handle oxalic acid - Wired How-To Wiki

Here's a cool link on dyeing horn & other stuff . Safety first again. some dangerous chemicals involved.
The...

Congrats. I sold a Fisher to a new member here. It was a killa shaver as I remember.

To make it darker, a very dilute mix of oxalic acid crystrals in water (10:1) or less will work but it won't...