Polymer
Polymer
Slavich is about to put a new polymer film on the market (see: http://www.forthdimension.net/slavich2002.html).If it is the same stuff as the one presented at the St.Polten "Holography 2000", speed will not be terrific. That paper pointed out sensitivity to be around 30-50mJ/cm2. The polymer can be coated on mylar film at 25-30um thickness.