Homebrew PCBs

I use 1:1:1 and with near Nill agitation and without heating I the pcb 
is etched in les than 2 minutes.
I use HCL 29%, H2O2 31%, and 100% H2O

Dne 10.7.2012 17:53, pi\ufffde Peter:
> Never tried acid etching myself. This might be worth noting:
> If your PCB is lying flat in the bottom of the etch container, the disloved copper will leave a film on your PCB. This effectively acts as a barrier between the PCB and etchant. The answer is to agitate the PCB or as mentioned, use something like a paint brush. Also mentioned is highter temperatures which usually speeds up chemical reactions - sometimes to a mad gallop. :-)
>
> Peter
> Shetland Islands.
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