I am going to use a propane torch to apply hard solder to silver. The Bernzomatic website says to use safety glasses that have lenses with a “shade number” of 4 or 5. Ordinary tinted glasses won’t do because they don’t screen out the harmful wavelengths.
Do you know any mail-order sources for simple (read: cheap) “shade 4” glasses? They don’t have to be impact-resistant.
Some books say you can determine metal temperature by its color; to melt hard solder, the silver should be between dull red and bright red (bright red is dangerously close to melting point). If you wear the
shaded glasses, can you still perceive the crucial color stages of the metal? I suppose it depends on the color of the lens…
Janet
—
“Give a man a fish and you feed him for a day.
Teach him to use the Internet and he won’t bother you for weeks.”
Replies
http://forums.taunton.com/tp-knots/messages?msg=13799.2
Who ever invented work didn't know how to fish....
auto parts stores, farm stores and even homedepot/lowes carries torch goggles.
Any welding supply will carry a vast selection of eye protection for welding/brazing/torching work.
Anyone use those those bifocal/magnifier safety glasses and what do you think of them?