Scala film is basically a negative that is turned into a positive. With that in mind any black and white negative film will work. Drop process is basically telling the operator to cut the development time to retain highlight detail ,
For the first contact pos step you need a flat original to enlarge onto large film.
Problem with the Scala method, I do not know anyone still doing it.
But I am sure the folks at DR5 sure could tell you how to make a pos from a contact neg.
Re the red green blue laser, sorry I cannot say as this type of discussion is not allowed here. ** hint ** film goes through laser imaging devices, rgb beams of energy do expose film, film taken from the imaging device and processed in a tray. ** but enough about that the mod/Police will be banning me soon.
I only have grade 10 science so your bachelor of science trumps me by a long shot.
Originally Posted by Curt