acid etching?

334dave

hi , i am newbie here and reading through i find it ... stimulating..

now as to what brought me here..
i have wanted to look in to art form of acid etching different knids of tempered steel
used in stainless knife blades..

does any one there know what mask coating will take a fine line scribed in it yet still give me a good sharp edge and what acids are best or safest to use..

i have Googled the subject and find nothing related to art acid etching or instructions or how to
only the photo / electro marking systems which do not produce fine sharp edges ..
also if some one knows of a site devoted to this a url would be nice..
thanks !

334dave

btt any one know? or should i check a diff forum?

334dave

btt still looking..any one?

alxm

I'd suggest using the photoresist etching method used for making PCBs.
It does give fairly sharp edges (look at a circuit board), if done correctly.

Woody101

Ferric Chloride, sold at Radio Shack as an etchant for electronic boards is commonly used as an etchant for knife blades. I dilute mine about 4 parts water to 1 part Ferric Chloride. Also it etches faster if the solution is heated to about 150 degrees or so.

For a mask coat you can use fingernail polish. When dry scribe your line in it. After etching remove the fingernail polish with acetone. I use Red nail polish because it is easy to see and easy to make sure you have all of it removed.

I also have a written procedure for etching using a salt solution and an electrical current, works well for small stuff but remember that introducing an electrical current into salt water produces chlorine gas. You have to make your own stencil though but that can be done with scotch tape.