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Joined: Dec 2003
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Campfire Oracle
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OP
Campfire Oracle
Joined: Dec 2003
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by soaking in black coffee?
I saw this on a video last week. Never seen or heard of this method before.
Anyone here at all familiar with this process?
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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Joined: Jun 2013
Posts: 529
Campfire Regular
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Campfire Regular
Joined: Jun 2013
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High carbon you can etch, for stainless it won't work. If I want to dark etch damascus, I boil 1 jar of instant coffee with about a quart of water. Let is soak about 2 hours but you can soak longer if you want. It will come out like this
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Joined: Dec 2003
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Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
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That’s gorgeous! Thanks for the reply. The video was making a tomahawk from, iirc, 4140.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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Joined: Jan 2006
Posts: 2,793
Campfire Regular
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Campfire Regular
Joined: Jan 2006
Posts: 2,793 |
Ferric Chloride works real well to etch. I just procured a bottle of it from Frigid North last week and did some playing with it today. It works good, and fast!
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Joined: Dec 2003
Posts: 86,325 Likes: 31
Campfire Oracle
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OP
Campfire Oracle
Joined: Dec 2003
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The video I saw, was just turning the tomahawk head black. There was no pattern nor Damascus they were trying to etch, per se. It was just coloring the head.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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Joined: Nov 2008
Posts: 19,608 Likes: 15
Campfire Ranger
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Campfire Ranger
Joined: Nov 2008
Posts: 19,608 Likes: 15 |
It’s the same as using vinegar or lemon juice to force a patina. The acid in the coffee attacks the surface of the steel.
At least that’s my understanding it.
MAGA
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Joined: Dec 2003
Posts: 86,325 Likes: 31
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,325 Likes: 31 |
Have you tried it? I’ve only used vinegar for rust removal. (Other than cooking)
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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Joined: Nov 2008
Posts: 19,608 Likes: 15
Campfire Ranger
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Campfire Ranger
Joined: Nov 2008
Posts: 19,608 Likes: 15 |
I have not yet. It’s on my list of things to play around with at some point. Mainly I’ve heard/seen it used to display the pattern on Damascus as demonstrated by that beautiful knife dan308 posted. The high nickel alloys don’t take the color and gives you the contrast. Supposedly the coffee really makes the 1084 or whatever your using dark, even more so than the ferric chloride.
I’ve used vinegar, lemon juice, onions, etc but for my purposes cold blueing works best so far. I’ve made some pretty dark too.
MAGA
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Joined: Feb 2001
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Campfire Tracker
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Campfire Tracker
Joined: Feb 2001
Posts: 5,220 |
I've had good success with Birchwood Super Blue. The same stuff I use to touch up firearms. It is a solution formulated to do exactly what you seek.
Active ingredient, Selenium Dioxide
Last edited by Boise; 02/26/21.
The difference between genius and stupidity is that genius has its limits. Albert Einstein
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Joined: Dec 2003
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Campfire Oracle
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OP
Campfire Oracle
Joined: Dec 2003
Posts: 86,325 Likes: 31 |
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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Joined: Dec 2003
Posts: 86,325 Likes: 31
Campfire Oracle
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OP
Campfire Oracle
Joined: Dec 2003
Posts: 86,325 Likes: 31 |
by soaking in black coffee?
I saw this on a video last week. Never seen or heard of this method before.
Anyone here at all familiar with this process?
Re-found the original vid I referenced and it was Damascus, not bare steel.
If you take the time it takes, it takes less time. --Pat Parelli
American by birth; Alaskan by choice. --ironbender
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