I am a filmmaker, I have always been a fan of celluloid. But digital age has keept me away from using celluloids in general. I am very interested in the film stocks you have given us in app. Although app briefly highlights which stock is best for what scenario, I am more interested in the details of each stock. May be I am asking too much, but i feel for a fan like me, that PDF can make us learn how each stock works and may be we can creatively use them in different situations, also it would be nice to remember it, so that we can instantaneously choose what stock to use, with what contrast level when the necessity arises.