Hello, is there a way of working out the strength of ammonium persulphate, I have been using about 5 tablespoons per litre of water, I have the temperature as hot as the hot water cylinder will supply and it takes about 15 minutes to etch. Are there any plans around for a small spray etching setup or could someone point me in the right direction for what sort of pump to use. Regards Philip
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Etching (time,strength,machine)
2005-12-11 by electrophilip