Quote Originally Posted by sanking
In my own case I considered the pros and cons of replacing the plain float glass in my two UV exposure units with one of the speciality glasses, but eventually decided that the small increase in printing speed was simply not worth the time and expense of doing so.

Sandy King
Another issue that I forgot to mention is the thickeness of the glass. Glass that is 1/16" thick transmits a much larger percentage of UV radiation than glass that is 3/8" thick. I have tested this with UV densitometer and the difference between glasss that is 1/16" thick and 3/8" thick and the difference is 1/2 to 2/3 of a stop.

As far as I understand, and I have spoken to people at both Olec and NuArc about this, the glass used in the vacuum frames of their platemakers and vacuum easels is plain float glass.

Sandy King