Homebrew PCBs

And, though I'd never suggest anyone try it, FeCl3 makes a decent cure 
for poison ivy.

Of course, so does a brush and clorox, but I wouldn't suggest that one 
either.

:)

mycroft2152 wrote:
> I use both FeCl3 and Acid/H202 etchant. Each has its good points as 
> well as its hazards. In either case, protective safety equipment must 
> be used.
>
> FeCl3 is a "milder" and "safer" etchant to handle. Yes, it does stain 
> just about everything, but there is usually very little serious 
> damage. On the other hand, Muriatic acid / H202 is extremely damaging 
> to just about everything, including skin.
>
> We all tend to become a little too familiar with the process and get 
> sloppy. I have had my share of stains and burns too. I definitely 
> prefer the FeCl3 stain.
>
> When I do an acid etch, I wear goggles and rubber gloves. I have the 
> etchant tank in a second containment tray. I also have a half kilo of 
> baking soda handy as well as running water. After finishing, I dust 
> everything with baking soda and keep adding baking soda to any spots 
> that fizz. Then carefully wash everything down.
>
> The acid etching process does generate heat and bubbles. There can be 
> a mist of etchant that is almost invisible. You will notice the 
> effects, if not immediately, but in a very short period of time. Acid 
> burns cause intense pain and heal very slowly. Fabric distegrates.
>
> Do not underestimate the danger. Having a little "experience with 
> acds and bases" in high school, does not adequately prepare you for 
> proper use.
>
> Be safe!
>
> Myc
> Industrial Chemist for 30 years