etching machine

[loneronin]

I would like to make an etching machine with a palmtop transformer (output 20V, 3,25A). Do you guys think this output is ok? or I need a higher voltage/amperage?
If I have to buy a new transformer wich is the right voltage/amperage output to look for to etch the logo on blades?

moreover, I read some knifemakers use diluited car battery fluid (solforic acid) to etch, some others mix salt, vinegar and lemon juice, some others only salt and water. which's the best and cleaner electrolyte?


thanks in advance!

[Alan B]

You can etch steel with simple salt water. 1/4 teaspoon of salt to 8 ounces of water. If you have an old cell phone charger it can be used for the power source. The one I have puts out a steady 11 volts. There is a blue print in the bp files on salt water etching.

[nett]

Search etching using this site's search machine. You'll find a lot of information.

Blacksmith Forum - Search Results

[LDW]

D.C. current etches the metal and A.C. current blackens it. Mine has a little bridge rectifier so it can be switched from D.C. to A.C.