JEOL Probe Users Listserver Moderator: Ellery Frahm, [log in to unmask], Electron Microprobe Lab, University of Minnesota Post a message: send your message to [log in to unmask] Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask] On-line help and FAQ: http://probelab.geo.umn.edu/listserver.html * 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. Craig S. Schwandt, Ph. D. Senior Research Scientist McCrone Associates, Inc. 850 Pasquinelli Drive Westmont, IL 60559-5539 Company Phone: 630-887-7100 Direct Phone: 630-734-2422 FAX: 630-887-7417 www.mccroneassociates.com *********************************************************** This message and any attachments, in part or whole, may contain confidential and legally privileged information and are intended soley for viewing and use by the above addressee. If you have received this transmission in error and/or are not the intended recipient, we request that you immediately notify the sender and remove all electronic records of this transmission from your computer and network system. McCrone Associates, Inc. cannot verify the electronic integrity of this transmission. Disclosure, copying, use, and/or any physical or electronic dissemination of the information included herein by anyone other than the intended recipient or authorized person(s) is strictly prohibited. *********************************************************** ________________________________ 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 University of Minnesota - Twin Cities Department of Geology & Geophysics Lab Website: http://probelab.geo.umn.edu Personal Website: http://umn.edu/~frah0010