[TheForge] copper, silver and cv19

[Bruce .]

Here's a source that's more than I care to read right now:
https://www.copper.org/publications/newsletters/innovations/1997/12/wiremetallurgy.html

Wikipedia says electrical copper is >=99.90% pure.  FWTW.

AFAIK, beryllium is used only in alloys of copper used for tools.  I could
be wrong.

Bruce
NJ


On Sat, Mar 28, 2020 at 2:00 AM jerry Frost <akfrosty at mtaonline.net> wrote:

> Being sensitive to copper isn't unusual, lots of people are. My older
> sister can't wear metal at all, even gold, stainless of any type is out.
> Copper that requires strength is typically alloyed with beryllium which
> makes it toxic in the extreme, do NOT grind, melt or weld copper busses. I
> don't know about house wire though, might be worth looking into.
>
> Frosty.
>
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net [mailto:
> theforge-bounces at mailman.qth.net] On Behalf Of C&J Allcorn
> Sent: Friday, March 27, 2020 11:28 AM
> To: theforge at mailman.qth.net
> Cc: jallcorn at suddenlink.net
> Subject: [TheForge] copper, silver and cv19
>
> Last spring or summer I made myself a copper bracelet out of electrical
> wire (braided, etc. I usually have an abundance of scrap Cu wire from
> wiring houses.
>
> it looked pretty neat) and I wore it for a week or so, then I developed a
> rash.  Stopped wearing and rash went away.
>
> Unsure if electrical wire contains something other than elemental Cu or
> not??
>
> Year ago I made silver and ethnic jewelry and found some women were
> allergic to anything but pure gold or stainless steel in their ears.  I
> bought and used Stainless findings w/ no problems reported.
>      JA
>
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