The Bernzomatic website says to use safety glasses when torch
soldering. The lenses should have a “shade number” of 4 or 5.
Ordinary tinted glasses won’t do because they don’t screen out the
Do you know any mail-order sources for simple (read: cheap) “shade
4” glasses? They don’t have to be impact-resistant.
The jewelry-making books I’ve read say you can determine metal
temperature by its color. If you wear the shaded glasses, can you
still detect different color stages of metal?