Soldering and other skills (was Re: QL-Quality (Was: ZX-81 Question))

From: Carl Lowenstein <cdl_at_proxima.ucsd.edu>
Date: Tue Apr 2 12:36:45 2002

> From: "Allison" <ajp166_at_bellatlantic.net>
> To: <classiccmp_at_classiccmp.org>
> Subject: Re: Soldering and other skills (was Re: QL-Quality (Was: ZX-81 Question))
> Date: Mon, 1 Apr 2002 08:40:54 -0500
> Content-Transfer-Encoding: 7bit
>
> From: Chad Fernandez <fernande_at_internet1.net>
> >How much lead does solder dor electronics contain? I thought only
> >solder for pipes contained lead?
>
> The best alloy is 63/37 63%lead 37% tin. Common variety is 60/40.
>
> The lead is not a hazard by inhalation though some of the fluxes can be.
> It is a contact hazard over time as it can be transfered from the skin
> to lips and injested. Solution, wash hands after using.
>
> Solder for pipes, by mandate has been below 5% lead for years, it
> used to be mostly lead {90/10}.

But the replacement for lead in plumber's solder is cadmium. And cadmium
is a pretty hazardous material itself.

    carl

-- 
        carl lowenstein   marine physical lab   u.c. san diego
                                          clowenstein_at_ucsd.edu

Received on Tue Apr 02 2002 - 12:36:45 BST