Originally Posted by Preußischblau
Has anyone ever tried any other substances for biting their plates (vinegar, coca-cola, other easy household things)? Info for copper would be ideal (since I have some of that), but I can get 36 gage aluminium quite easily. Longer biting in the bath is acceptable to me.
Or am I asking for crazy things?
I'm trying to find an apartment-able alternative to engraving, which is time-consuming and deliberate-looking, and generally not the best for the kind of sheep-wool texture I'm looking for.
I don't think you are asking for crazy things!
I am not an artist, but I am looking for alternatives for etching PCB (printed circuit borads) of copper. And there is a solution that uses vinegar, salt and hydrogen peroxide. Using normal 3% hydrogen peroxide takes almost one hour to etch the plate. But using 50% hydrogen peroxide it makes it in some minutes, 10 or so.
Here a recipe you may use:
To prepare 1 Liter solution, weight 200 g salt, normal kitchen salt, and add vinegar until it makes 600 ml. Dissolve the salt as far as you can in the vinegar. Then add 400 ml of 3% hydrogen peroxide and use at once. The solution is unstable, hydrogen peroxide will degrade in water. If you store the solution afterwords, don't close it completely or it may gain pressure and explode.
I also found out that a little Sodium Bisulfate (about 30g) added to this improves the performance of the bath. I don't know why but it happens!
I hope this is a good information for you!
Note: When using 50% Hydrogen Peroxide, I increase vinegar to 900ml and use only 100ml or less of hydrogen peroxide.