Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

From: stuart.lamble@...

>After much time, nothing has been etched
>What am I doing wrong?
>Have I missed out something?

You should have developed the image with sodium hydroxide solution.

I prefer the ready-made developer, but you can try a teaspoon of Caustic Soda in
a pint of water. It's pretty nasty stuff.

Wearing rubber gloves, stick your exposed board in the solution and scoosh it
about - you'll soon see when it's done.

Rinse it and then etch it.

Regards, Derryck