Previous Thread
Next Thread
Print Thread
#4570716 - 11/05/10 Carbon Steel Blades: "Forcing A Patina"  
Joined: Jun 2002
Posts: 79,355
The_Real_Hawkeye Offline
Campfire Oracle
The_Real_Hawkeye  Offline
Campfire Oracle

Joined: Jun 2002
Posts: 79,355
Northern Florida
Do any of you carbon steel knife owners ever "force patina" any of your blades? I just did to one of my tool steel Case knives. This one dates back to 1974. I used several acidic applications, i.e., onion and lemon juice, and a ketchup/mustard mixture to achieve a sort of color case hardening effect.

It was given to me (because I admired it) by a friend who had recently inherited it from his grandfather. We were kids at the time. At the time, it already had a nice iridescent, deep blue, naturally acquired patina, but back then I thought a blade with a patina was just a blade that needed a good polishing, and did so as soon as I got it home, bringing it back (after lots of elbow grease) to looking brand/shiny new. Kept it that way for years with careful applications of oil after every use.

When I realized many years later how highly prized such natural patinas are on carbon steel blades, I made an effort at restoring it using a "forced patina" process. Not quite as nice as the natural one that was on it when I first acquired it, but still nice I think. Vinegar works well, too, I hear.

[Linked Image]

PS I've since offered to give it back to my friend, assuming he didn't quite understand at the time the significance of owning his grandfather's pocket knife, but he refuses to take it back, insisting a gift is a gift.


"It’s the usual Christophobic fifth column rooting for the Islamization of the West." - Ann Coulter
AIH 728 BP
#4570806 - 11/05/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: The_Real_Hawkeye]  
Joined: Apr 2010
Posts: 95
Romey Offline
Member
Romey  Offline
Member

Joined: Apr 2010
Posts: 95
MT
Mustard can make some interesting patina


Romey
#4571027 - 11/06/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: The_Real_Hawkeye]  
Joined: Sep 2003
Posts: 3,620
Walker Offline
Campfire Guide
Walker  Offline
Campfire Guide

Joined: Sep 2003
Posts: 3,620
Wisconsin
Originally Posted by The_Real_Hawkeye
I used several acidic applications, i.e., onion and lemon juice, and a ketchup/mustard mixture to achieve a sort of color case hardening effect.

I get that effect using mustard only, by purposely applying it unevenly. Looks great.

If I just want an even layer of patina, soaking the blade in a 50/50 mixture of vinegar and water seems to work pretty well. (Be sure to remove any oils, fingerprints, etc. from the blade, beforehand.)

#4571262 - 11/06/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: Walker]  
Joined: Jun 2002
Posts: 79,355
The_Real_Hawkeye Offline
Campfire Oracle
The_Real_Hawkeye  Offline
Campfire Oracle

Joined: Jun 2002
Posts: 79,355
Northern Florida
Originally Posted by Walker
Originally Posted by The_Real_Hawkeye
I used several acidic applications, i.e., onion and lemon juice, and a ketchup/mustard mixture to achieve a sort of color case hardening effect.

I get that effect using mustard only, by purposely applying it unevenly. Looks great.

If I just want an even layer of patina, soaking the blade in a 50/50 mixture of vinegar and water seems to work pretty well. (Be sure to remove any oils, fingerprints, etc. from the blade, beforehand.)
You can get an irregular pattern with vinegar, I hear, by soaking a paper towel in it and wrapping the blade with the paper towel.


"It’s the usual Christophobic fifth column rooting for the Islamization of the West." - Ann Coulter
#4575028 - 11/07/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: The_Real_Hawkeye]  
Joined: Mar 2005
Posts: 6,184
MOGC Offline
Campfire Tracker
MOGC  Offline
Campfire Tracker

Joined: Mar 2005
Posts: 6,184
I've used lemon juice and it worked quite well.


"Doing the right thing isn't always easy, but it's always RIGHT!"
#4576128 - 11/07/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: MOGC]  
Joined: Dec 2007
Posts: 2,171
LouisB Offline
Campfire Ranger
LouisB  Offline
Campfire Ranger

Joined: Dec 2007
Posts: 2,171
TN
Rub down with fine abrasive of some kind, wash, degrease, liberal application of prepared mustard overnight, rinse off.

Last edited by LouisB; 11/07/10.

Some spelling errors can be corrected by a vowel movement.
#4578957 - 11/08/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: LouisB]  
Joined: Feb 2003
Posts: 2,303
Droptine Offline
Campfire Ranger
Droptine  Offline
Campfire Ranger

Joined: Feb 2003
Posts: 2,303
The Republic of Texas
Ferric Chloride will force a patina on straight carbon steel pretty quickly, like in a few minutes. That's what I use to etch damascus blades. 50/50 mix with distilled water.

DT

#4579804 - 11/09/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: Droptine]  
Joined: Apr 2004
Posts: 61,130
VAnimrod Offline
Campfire Oracle
VAnimrod  Offline
Campfire Oracle

Joined: Apr 2004
Posts: 61,130
gone
The search engine is your friend, as I put up a thread on this within the last year...




#4581799 - 11/09/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: VAnimrod]  
Joined: May 2005
Posts: 8,649
nighthawk Offline
Campfire Outfitter
nighthawk  Offline
Campfire Outfitter

Joined: May 2005
Posts: 8,649
NE South Dakota
I did a Green River style knife to go with muzzle loader kit. The article I followed recommended citric acid (Fruit Fresh - grocery store)which is pretty much the same as using lemon juice. Not quite right but came out close.


"May the forces of evil become confused on the way to your house." -- George Carlin
#4582370 - 11/09/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: nighthawk]  
Joined: Oct 2009
Posts: 691
CraigCollier Offline
Campfire Regular
CraigCollier  Offline
Campfire Regular

Joined: Oct 2009
Posts: 691
Illinois
These are 3 Forgecraft butcher knives of my mother's that are fairly old. I refinished the original handles and after cleaning the blades back to shiny, decided a patina would suit them better.

Did this with several applications of mustard and vinegar, vinegar soaked paper towels, brushed on mustard, etc.

Works great!
[Linked Image]


Craig R. Collier
~Grizzly Custom Knives~
#4582829 - 11/10/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: CraigCollier]  
Joined: Sep 2003
Posts: 3,620
Walker Offline
Campfire Guide
Walker  Offline
Campfire Guide

Joined: Sep 2003
Posts: 3,620
Wisconsin
Originally Posted by CraigCollier
These are 3 Forgecraft butcher knives of my mother's that are fairly old. I refinished the original handles and after cleaning the blades back to shiny, decided a patina would suit them better.

Looking good at both ends, Craig. Nice job!

#4582995 - 11/10/10 Re: Carbon Steel Blades: "Forcing A Patina" [Re: Walker]  
Joined: Oct 2009
Posts: 691
CraigCollier Offline
Campfire Regular
CraigCollier  Offline
Campfire Regular

Joined: Oct 2009
Posts: 691
Illinois
Thank you sir. I think I successfully rekindled the life in these old knives and I hope they last me for the 40-50 years they lasted my mom and grandma.


Craig R. Collier
~Grizzly Custom Knives~

Moderated by  RickBin, SYSOP 

AIH 160 1
Who's Online Now
91 registered members (325Abn, Allan S., 1flier, 30Gibbs, 700xcr, 19Scott63, 15 invisible), 524 guests, and 444 spiders.
Key: Admin, Global Mod, Mod
AIH 160 3









Copyright © 2000-2017 24hourcampfire.com, Inc. All Rights Reserved.
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.080s Queries: 14 (0.003s) Memory: 0.9973 MB (Peak: 1.2164 MB) Zlib enabled. Server Time: 2017-06-29 07:24:44 UTC