I recently did some Internet research regarding safety and transmittance of various materials that people use to view the sun with. I am sharing the URLs with you here. This is the best article I found. "Solar Filters Time for an International Standard" by Courtesy of B. Ralph Chou, MSc, OD http://www.mreclipse.com/Special/filters.html#table1 I strongly recommend reading the part of the article above called "Retinal Burns" It gives nonarbitrary figures that have true meaning in the debate of "what is safe." Finally, at http://www.jlab.org/ehs/manual/EHSbook-458.html#11507 "Laser Bioeffects & Non-Beam Hazards" is some very informative information relating to eye damage as caused by light sources. Safe viewing! Tom Iowa USA ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
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