OK, so keepitsimplestupid hijack's Ricks thread, and smilingcat hijacks keepitsimplestupid's hijacked thread. Interesting.
For those of us who are not chemists, what is HF acid?
Steve Greenfield AE7HD
--- In Homebrew_PCBs@yahoogroups.com, "smilingcat90254" <smilingcat@...> 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.
>