Time to realize that Tin and Lead can co-exist in different ways.

If they are electroplated together, they form discrete chrystals, and
function as if they were alone.

If they have been melted together, as we used to do in the old days to
electroplated Tin/Lead, they form the alloy known as "solder", and are MUCH
more stable, and much less prone to whiskering...so always ask if the Tin
Lead you are talking about has been melted to form the alloy, or is in an
as-plated form.

Rudy Sedlak
RD Chemical Company

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