M&G lists sodium persulfate as an alternative to FeCl. Anyone tried it? I've already read the archives and haven't seen any actual use. Most alternative etchant use seems to have been ammonium persulfate which although clear and allows viewing the etch progress apparently is difficult to store over time...especially in plastic. How difficult is sodium persulfate? tnx jtm
Message
Sodium Persulfate?
2004-03-22 by mdgolfbum