Dennis Waggoner wrote:
>
> When its mixed with 3%H2O2 it is even less concentrated. The
> combination of both generates less fumes. I usually etch outside and
> you dont even notice the fumes. When you store Muratic Acid. If the
> lid is not tight fumes will leak out and corrode any metal withing a
> foot or so. That is the only percaution you need to take storing.
>
> When mixing be very carefull not to splatter the mixture into you
> eyes. Pour the acid into the h2o2 not the h2o2 into the acid. That is
> the most dangerous part of the operation and there are some very
> noxious fumes generarated at this point. One again keep you eyes away
> from the mixture. Use goggle would be the best bet when mixing. And
> also if you are manually agitating the pcb up and done in the etchand
> to speed the process again you can generate spatters so watch you eyes
> here also.
>
> Dennis Waggoner
Dennis,
Thanks for the info. I have used NaOH (sodium hydroxide) for making soap
so I always added that to the water so I understand the reason. I also
have full face safety shields so I am good there too.
Dave
> _,___