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----- Original Message ----- From: "East75th" <email@example.com> To: <firstname.lastname@example.org> Sent: Sunday, April 28, 2002 7:52 PM Subject: Re: scanner glass replacement > What effect does alkali content (as mentioned in the catalog) have? Does it > affect the transmission spectrum? Dane, There's a transmission curve given in the right top of the " selected white floatglass" page. Anything below approx 350 Nm is transmitted for more than 90% and the curve is a straight line from 400 to the right. So that includes a tiny bit of UV too. I see no difference in the transmission compared with the alkali free thin sheet glass transmission curve. Is the free alkali not more an issue for using it with coatings and in chemical reactions after bonding it to electrical components ? Ernst - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.