Matt Scanlan Posted January 7, 2020 Share Posted January 7, 2020 I'm attempting to etch a pattern on the 440c. Normally with ferric chloride I use krylon spray paint and OPI nail polish as a resistant. But neither ferric chloride nor muratic acid would etch the steel. So I tried 10:1 diluted sulfuric acid and it worked like charm. The first time I tried it got underneath the spray paint. The second time I tried using adhesive lamination film but I got the same results. I'm cleaning the blade with alcohol and then washing it with simple green before I put anything on it and the second attempt I re-sanded the surface down to 1000 grit. Anyone got any advice on what to use as a resistant? Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted January 7, 2020 Share Posted January 7, 2020 Have you tried asphaltum varnish? (We used to remove it afterwards with WD40.) Quote Link to comment Share on other sites More sharing options...
pnut Posted January 7, 2020 Share Posted January 7, 2020 Have you tried liquid paper/ White out or Masking fluid from the the craft store paint aisle? I would try the white out first. Pnut Quote Link to comment Share on other sites More sharing options...
Matt Scanlan Posted January 7, 2020 Author Share Posted January 7, 2020 2 minutes ago, ThomasPowers said: Have you tried asphaltum varnish? ThomasPowers. I'll be honest ive never even heard of it. Is it something you can get at a hardware store like lowes or ace? 2 minutes ago, pnut said: Have you tried liquid paper/ White out No I havent tried that but I do have some one hand. I'll give it a shot! Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted January 8, 2020 Share Posted January 8, 2020 It's a *very* traditional acid resist; an old US government spec from 1922 said it had to resist sulfuric acid, 33%, for 6 hours... As I recall we bought a can from an artist supply or perhaps rio grand jeweler's supply. It was 35+ years ago when I was working with the sword maker... Quote Link to comment Share on other sites More sharing options...
Matt Scanlan Posted January 8, 2020 Author Share Posted January 8, 2020 Well I just tried using the whiteout and the sulfuric acid started reacting with it immediately so thats a no-go. Guess I'll have to wait and get some asphaltum varnish in. Quote Link to comment Share on other sites More sharing options...
Chris C Posted January 8, 2020 Share Posted January 8, 2020 Here ya go, Matt. This might help. Commercial link removed per TOS Quote Link to comment Share on other sites More sharing options...
Matt Scanlan Posted January 8, 2020 Author Share Posted January 8, 2020 Thanks Chris C, I just ordered a can. Quote Link to comment Share on other sites More sharing options...
Chris C Posted January 8, 2020 Share Posted January 8, 2020 Quote Link to comment Share on other sites More sharing options...
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