Having been using my first batch of persulphate for a month or just over its finally given all it can give and won't etch any more! I realise that obviously I can't just pour it down the drain, so my question to the experts is what can I do with my expired etchant?
I have read on some other forums found from google searches that you can do some kind of electrolysis to regenerate the persulphate to use again? Has anyone had any experience with this?
Thanks,
Will