[TheForge] Vision damage and welding shields pt 2

[Bruce Freeman]

No, this isn't quite true.  That same wavelength is produced by almost all =
fires because sodium is so common.  A clean gas flame is blue, but the =
flames you see in a gas forge (as well as a coal forge) are yellow due to =
the sodium present.  The didymium lens filters out this bright yellow =
light. =20

Now whether that will help you with your forging is another question =
entirely.  I would think that once you get used to it, it would help you =
see the true heat color past that bright sodium flare.  I haven't tried it =
myself.

Bruce
NJ

>>> rackersr@insightbb.com 01/11/03 09:18PM >>>
Didymium is used to filter out a specific wavelength of light produced by
sodium glass.
If you don't work with sodium glass, there's no need for didymium lenses. =
None.