For carbon arc welding the proper shade is
14. It is a little challenging to find, but you can find the plates and
replace the plates that come with the goggles with the 14. The safety note is
that I’ve only found shade 14 in glass plates, so there is a potential
for breakage. Shade 14 works very well when the arc is on, but you can’t
see anything when it isn’t, but you’ll preserve your eyesight.
Senior Research Scientist
McCrone Associates, Inc.
Company Phone: 630-887-7100
Direct Phone: 630-734-2422
FAX: 630-887-7417
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From: JEOL-Focused
Probe Users List [mailto:[log in to unmask]] On Behalf Of Ellery Frahm
Sent: Monday, April 28, 2008 11:09
PM
To: [log in to unmask]
Subject: [PROBE-USERS] Proper
shade for vacuum evaporation
I'd like to purchase additional welding googles for use while coating
specimens in our new vacuum evaporator (via thermal evaporation using sharpened
carbon rods). I have one old pair of welding googles, but I
have no idea what shade they are (they don't appear to be labelled). Does
anyone know the minimum shade value for this purpose? 5? 10?
15? Something in-between? I and other researchers in the lab
enjoy seeing, so I'd like to choose the right shade.
Thanks,
Ellery
--------------------
Ellery E. Frahm
Research Fellow & Manager
Electron Microprobe Laboratory
Department of Geology & Geophysics
Lab Website: http://probelab.geo.umn.edu
Personal Website: http://umn.edu/~frah0010