greetings! I do quite a bit of cyanotypes and have recently been considering the possibility of doing some on glass.. When thinking (dreaming?) of doing this I am leaning more toward an ambrotype sort of image, taking my original 4x5 negative and reversing it to make the glass cyanotype 'negative' .. I would also try a 'normal' positive first before attempting a simulation of an ambrotype Has anyone around these parts tried this before? People who have coated glass, what kind of troubles in coating should I expect to need to overcome? I am guessing my most immediate problem will be the solution just washing off instantly in water.. If that isnt a problem, making a coating on the glass will be.. any ideas of how I might thicken up the emulsion? (albumen?!) any suggestions/warnings/naysaying would be useful !