One more note on eye protection education:
Linda Stroud's poster showing a comparison of different forms of eye protection (Science & Safety Consulting Services) is excellent. I keep 2 of them (laminated) to post at any event. One of them will be going up at the ACS student affiliates' goggle sale.
Currently available on Amazon and Safety Emporium (Google: "comparison of eye protection poster")
Sheila M. Kennedy, C.H.O.
Safety Coordinator | CHEM Teaching Laboratories
Chemistry & Biochemistry | University of California, San Diego
9500 Gilman Dr. | La Jolla, CA 92093-0303
Office: (858) 534 - 0221
From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Stephen Stepenuck
Sent: Saturday, February 07, 2015 1:45 PM
Subject: Re: [DCHAS-L] DCHAS-L Digest - 4 Feb 2015 to 5 Feb 2015 (#2015-16) Eye protection education
1. Re Mel Charlton's post about the eye protection video, I agree with David Katz, et al. that it was most likely Norman Quam's production, where they painted mannequin heads with solutions of Fe(III) or thiocyanate, and exploded flasks containing the other reactant, causing red spots/blotches wherever the eye/face protection had failed, or not covered. Someone should certainly resurrect and reproduce that video, rather than "reinvent the wheel," as Mel says [if only for the safety implications].
2. Re the suggestion of using NaOH in a Petri dish as a demo, I haven't seen anyone mention a variant that I have found to be strikingly effective when trying to "reach" people [young academic, or older industrial types] to wear their eye protection *all* the time: It was not my idea, and I can't remember where I first saw it to give the inventor credit, but: separating the white of an egg, telling the students that that is similar to [some] tissue in the eye, then putting that in a Petri dish on an overhead projector [if you can find one that works] then asking the class to count the time before my added drop of concentrated HCl [i.e. not base] coagulated the previously transparent egg white, frequently yielded outright gasps from the audience. Of course, the "instant cataract" projects black on the screen. Then all the instructor need do was ask "Could YOU see through that?" and/or "Could you beat that to the eye/face wash?" and the point was made. I had much less troub!
le enforcing eye protection after that demo.
Suggestion: I would NOT tell them what the chemical was, except that it was a very common one that they had all probably used, nor that this type of damage might be repairable by eye surgery, whereas that from a base would be much more difficult, if even possible, to repair.
Stephen J. Stepenuck, Ph.D.
Professor of chemistry emeritus
Keene State College
Keene NH 03435-2001
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