> > I have the choice of:
> >
> > ROSOL 1S S-Sn96,Ag4 250g 15eur
> >
> > ROSOL 3 S-Sn97,Cu3 250g 10eur
> >
> > Now what is the difference between paste with copper and paste with
> > silver? I don't really mind the price since it will go a long way.
> > I remember some leadfree solder (wire) has silver in it too?
>
Apart from the melting points, one of the things that has me really
concerned is tin pest. For most projects its probably not a big issue,
as few will see the outdoors or temperatures much below room
temperature. I would tend to think that either of those solders would
be subject to failure if exposed to low temperature (below 13 deg C)
due to tin pest. The silver version might be a bit better than the tin
copper version.
Ron