I prefer using Ammonium Persulfate, its non-staining and has little odor. Also turns green as it weakens. ----- Original Message ----- From: "Ben Hencke" To: "Microcontroller discussion list - Public." Sent: Tuesday, May 31, 2005 4:59 PM Subject: Re: [EE] pcb eching tank. I find a perfect one > On 5/31/05, Debbie wrote: > > I just use a large plastic photographic tray & conc FeCl3. Rock it gently back > > & forth by hand - takes ~40 minutes @ room temp. Wear rubber gloves! Debbie. > > Yes, wear gloves. I got that stuff in a small cut on my finger once, ouch. :-( > I have tried hair blow driers, but that doesnt seem to work too well. > Best result I've had was floating the whole container in a larger > container filled with hot water. It also helps with spills. > - Ben > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist