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Etchant for d2 high carbon steel

I'm trying to etch d2 die steel. I've been using 1part nitric with 3 parts water. It worked at first, but its getting worse and worse. (I regrind the end smooth, and re-etch it) I'm pretty sure I decarburized the surface when I heat treated it, which is why it etched initially. Nital eats my resist (as well as not working), so its right out.

Thanks,

Michael Boettcher
- Madison, Wisconsin
2003

I am looking for the correct chemical used to etch embossing dies. My understanding is that a 50/50 mixture of Nitric acid and water should be used,however this is not working for me... I am using hardened A2 and D2 steel. Any suggestions would be greatly appreciated.

Chad Kowalke
Screnprinting - LaCrosse,WI, USA
2005

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