Homebrew PCBs

On Sat, 27 Jan 2007 22:04:47 +0100, Lez <lez.briddon@...> wrote:

>
> Ok 1 product down............
> Is H2S dangerous, think I heard it mentioned about cats on cars
> Lez


It is by no means certain sulphuric acid is really what was in that  
cleaner. Check ingredients list. For PCB work it would be preferred to get  
"pure" chemicals without any added substances (other than water). You do  
not know what any other ingredients may do to the resist or how they may  
react with H2O2. For example i think it is not a good idea to combine H2O2  
with some bleaches, which could easily be in some cleaners.

ST