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----- Original Message -----From: tom42107@...>I'm not happy with my etching. I'm using FR4, 1oz. copper boards.>My copper cleaning is very thorough and my toner transfer is very dark and even.>My etchant solution is two shot glasses of muratic acid and four shot>glasses of hydrogen peroxide,If your copper is pitted, then your resist is not working.Maybe ferric chloride or ammonium persulphate would be gentler on the toner/resist.geoff