Quoth Howard at 2008-06-05 00:23...
> Anyway what i am wanting to know is, how meny grams of Ammonium
> persulfate do i mix to 3 ltrs of water, to etch Fotoboard 2 pcb ?
I have just fished the old lemonade bottle from under my bench in which
I used to store partially used ammonium persulphate. As I always forget
these things, I had been careful to label it:
64g in 250ml
I've used sodium hydroxide before but have one too many overdevelopments
on Kinsten PCB stock, so now use sodium metasilicate, which is much less
vicious. I know, however, that there are others on this list that swear
by sodium hydroxide (I merely swear at it.)
HTH
Cheers
M
--
Matthew Smith
IT Consultancy & Application Development
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