Dear David,

My task was to put cyanotype image on glass and protect it from elements and damage. First, I thought of using gelatin as a substrate (sand or etch glass if
necessary) and sandwich with another piece of glass. Then I came across your experiment with Kuraray R-1110 and thought it would make my life much easier: coat glass with polymer, bake it, coat with cyanotype emulsion, expose, process, dry, put another coat of polymer, bake it and get a reasonably well protected image on glass.
Kuraray R-1130 is a totally different beast. It is reactivity with inorganic substances that make it water resistant. I'll be very much obliged if you could share
some specifics of you experience.

Best regards,