Hot melt color

[Aaron]

I have seen some threads indicating others have seen a bright purple surface color when rendering their lead. It seems as though they were using virtually pure lead. Can this happen with WWs as well? Got a batch reeeaaalll hot today and it was bright purple on top. It came back almost as soon as I skimmed it. At first I thought I melted some zinc into it, but from what I read that is probably not the case. Anyway, mostly just relating somethimg that happened today. Pretty sure it is a non-issue based on other threads.

Aaron

[mooman76]

I have melted WW where it turned purple on top until skimmed. I think it's getting so hot the metals are seperating or something like that!

[georgeld]

mm76:" you got that part right.
Always wondered just what metal it was. Think it might be tin, or zinc.

To me, that's a sign to flux a bit and start cutting back on the heat, or add more metal to the pot.

Flux and mix it back in is much better than skimming it off.

[TAWILDCATT]

its your tin.to much heat could give fumes to some alloy and poison you.