> Gravity Works made those print frames. I've got a couple and they're awful.
> The rubber surgical tubing fasteners never did a good job and the UTV
> really made no difference in the exposure and also the larger sheets (11x14
..about a year ago I did some testing of "normal" glass and crystal
glass: the crystal glass allows transmission of UV. standard glass cuts
off UV a an certain wavelength (have to look that one up, I thought about
300nm, not sure..). Tested both types of glass on cyanotype and VDB, the
crystal printed faster, but not dramatic (if I remeber correctly about
10-15%)..
Cor Breukel
http://ruly70.medfac.leidenuniv.nl/~cor/cor.html
"The Infrared Gallery"
http://ruly70.medfac.leidenuniv.nl/~cor/ir-gallery.html