Hi, this is not my area of expertise but I am currently working with PVB (7.5g Pioloform BM18, dissolved in 100mls 1-butanol, 24hrs @ 50degrees C) . I make up various concentrations of chloral hydrate in thymol blue dye. Then add 3mls of this solution to around 20mls PVB mixture. The problem is that I don't understand the interactions between these compounds and how well they mix together. After mixing for a few hours they are poured on 15cm x 15cm horizontal glass plates. Upon drying over 2 days there is a wave effect noticable on the surface and not smooth as I would like. I also think the chloral hydrate/ dye is not properly dispersed throughout the film once dried. Any info on how these compounds may intereact and how I can produce a smooth thin layer film with dye and chloral hydrate dispersed throughout PVB matrix would be appreciated.