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The Newbies Arena Are you new to knife making? Here is all the help you will need.

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  #1  
Old 10-30-2011, 01:34 PM
Ken W. Ken W. is offline
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"The Edinburgh Etch"

First off I want to thank Ray and all the rest of you who shared your knowledge with me in the thread I started about Blind Pinning. Just finished the knife in question and posted photos on the Gallery as "New Guy's......"

Came across an interesting article about using citric acid in the standard ferric chloride etching solution. Not having any "anhydrous citrate" on hand I pulled an immature grapefruit off the backyard tree and added about 1.5 oz. of fresh squeezed and filtered juice to a 5:1 dilution of ferric chloride from Radio Shack for a total volume of 34 ounces. Did two 20 minute soaks with a neutralizing bath and rub out with 1500 grit. Seemed to work real well on both the Mokume and the Devin Thomas SS blade as shown below.

Here's a link to the article. May be something useful for the knifemaker?

Edinburgh Etch http://www.nontoxicprint.com/etchcopperandbrass.htm



Ken W.
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Old 10-30-2011, 03:51 PM
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Ray Rogers Ray Rogers is offline
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Looks good. Many things can be used as etchants, common among them are white viengar, lemon juice, and even pig urine (especially on mokume'). I might squeeze a grape fruit but I don't think I want to squeeze a pig ....


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Old 10-30-2011, 04:30 PM
Ken W. Ken W. is offline
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Ray; What I gathered from the article was that the citric acid/anhydrous citrate bonds with the metal molecules as the etchant corrodes them loose from the mother source. Apparently this then traps the metal in the solution resulting in less scale buildup and a faster, cleaner etch.

Having absolutely no experience I'm in no position to judge whether my grapefruit did anything more than make the ferric chloride a more refreshing beverage.

Ken W.
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Old 10-30-2011, 11:46 PM
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TexasJack TexasJack is offline
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Those are really good articles (with real chemistry!) about the Edinburgh Etch and the Saline Sulfate Etch.


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Old 10-31-2011, 11:15 PM
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GHEzell GHEzell is offline
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I had read about the Edinburgh etch a few years back and thought it sounded like a very promising method... I do a bit of artistic etching on blades sometimes, and etch logos using ferric chloride.

I never followed through on testing it, too many irons in the fire, so to speak. It might make a good winter project this year....


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Old 10-27-2021, 05:14 PM
desert.snake desert.snake is offline
 
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This is a great recipe! Thank you so much for that. The site works fine now.
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Old 10-28-2021, 12:21 AM
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Thanks for bumping this thread and letting me know PM! Glad the etch came out good, I'll have to try this as well.


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