Homebrew PCBs

I think I've already admitted my stupidity here, and that I regret my
off-the-cuff response. I guess all that's left is to apologize to you
personally, and to thank you for your work as moderator.

73,

Todd
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K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
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QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design


On Wed, Mar 20, 2013 at 8:19 PM, AlienRelics <alienrelics@...> wrote:

> **
>
>
> -You- inserted sarcasm into my question. I had a pretty good idea that HF
> meant hydrofluoric acid. I was asking partly for those on the list who
> don't know what it is (and it is not guaranteed that the first Google
> result is the correct hit), and partly to remind people to spell out what
> they mean now and then.
>
> I wasn't aware that "HF" was a "big fancy word".
>
> I notice you said nothing about the part about hijacking the thread.
>
> As for me being a troll, I'm the listowner, Einstein. Something you could
> have looked up easily enough. Dunning-Kruger?
>
> Steve Greenfield AE7HD
> your occasionally fed-up moderator
>
> --- In Homebrew_PCBs@yahoogroups.com, "Todd F. Carney / K7TFC" <k7tfc@...>
> wrote:
> >
> > Google "hf acid." The very first item on the page--big as life--will
> answer
> > your question and tell you all about it. Oh, I'm not a chemist, either.
> I'm
> > just a guy of normal intelligence who knows how to use a web browser. I
>
> > also know better than to broadcast my stupidity for intelligent people to
> > see.
> >
> > Sorry about this peevish (look that up, too) response, but this kind of
> > "Okay, *Einstein*, what does that big fancy word mean, anyway?" attitude
> > really bugs me. I actually think it's mostly trolls who do this kind of
> > thing, so it's just one more thing to ignore.
> >
> > I must be in a "mood." I guess I better go solder something together.
> >
> > 73,
> >
> > Todd
> > ----------------------------------------------------------
> > K7TFC / Medford, Oregon, USA / CN82ni / UTC-8
> > ----------------------------------------------------------
> > QRP (CW & SSB) / EmComm / SOTA / Homebrew / Design
> >
> >
> > On Mon, Mar 18, 2013 at 2:39 PM, AlienRelics <alienrelics@...> wrote:
> >
> > > **
> > >
> > >
> > > 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.
> > > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>


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