wow!
You dudes play around with some very nasty stuff just to etch a printed
circuit!
Or, maybe this thread is just a sort of "pissing contest" to show off that
the participants have had Chem 101 at a community college.
Pardon my cynicism, but I just don't get the drift.
Keep it simple..........keep it safe.
Roland F. Harriston, P.D.
∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗
On 3/15/2013 4:16 PM, smilingcat90254 wrote:
>
> Calcium carbonate for that matter most carbonate will react with even
> trace amount of hydrochloric acid remaining in your etchant. And yes
> it will foam because CO2 is being released in the reaction. So if your
> solution keeps foaming keep adding the carbonate. It will neutralize
> the acid for safe disposal.
>
> Reaction of Copper chloride and Calcium carbonate probably will be
> much slower than Copper chloride and sodium carbonate. But it should
> work. not 100% plus sure.
>
> ∗∗∗∗ HF acid ∗∗∗∗
> I was in semiconductor manufacturing business so I'm quite aware of HF
> acid. Very dangerous stuff. No you can not store in a glass. It will
> etch glass. No you can not store in stainless steel container!!
>
> HF chemical burn is severe even at low concentration. It will
> penetrate bare skin and the flourine ion will interact with the
> calcium in your bone. HF will dissolve your bone under all the tissue.
>
> I didn't think you can buy it unless you can show you are a business
> or a researcher of some sort.
>
>
[Non-text portions of this message have been removed]