What etchant are you guys using?

[jimmybjj]

I'm currently using muratic acid in 1 to 1 solution with 40% peroxide. Not happy with the results I'm getting, hence the reason for the thread. It don't seem to work very long. I start a session with fresh solution and it starts off fast but quick comes to a slow crawl, having to sometimes add fresh solution.

[deadastronaut]

wow there been lots of threads recently on this....i guess its because people are experimenting with different gear..

i stick with ferric chloride...good results ALL the time...whether its pcbs or boxes....no problems at all...

[alparent]

I tried the muratic acid/peroxide mix and didn't like it ether.

I use to etch with ferric chloride in a tank with a heater and a bubbler (What a pain!) So I have a LOT of ferric chloride.

Now I use ferric chloride and sponge technique. I can etch a 3" x 3" board in about a minute. http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/

I also use this technique to etch enclosures.

[Perrow]

Hydrogen peroxide, salt and white vinegar, a bit slow but I like the relative non toxicness of the components.

[culturejam]

Hydrogen peroxide, salt and white vinegar, a bit slow but I like the relative non toxicness of the components.

That sounds interesting! I'll have to try that. What are your mix ratios?



I've been using muriatic plus strong peroxide for a long time. It's slow compared to fresh ferric, but it's consistent and relatively safe. I've had the same batch going for a couple years. Every few boards it requires the addition of a little peroxide and a little acid, but it's been going strong for a long time.

[CodeMonk]

I use Muratic Acid/Hydrogen Peroxide in a 3/2 ratio
That along with an air pump that you can get at any store that sells fish supplies (the pet type of fish).

Costs me a WHOLE LOT LESS than Ferric Chloride.
I think the muratic acid is a 14.5% solution