Computer to film is one of the best ways of seeing your job before it is printed, you can guarantee that what you see on the film is what will endupon the plate. The problem with it is, the client has to pay for the film prcess and also for having that film plated. Which basically means you have to pay for two processes before you get to print. So alot of publishers have decided to opt for ctp (computer-to-plate) thus reducing their reprographic costs. The other great advantage that ctp has over ctf is that it is first generation, which means the quality of your print job will be even better. Computer-to-plate is a process that is soon to be no more because there are becoming fewer reasons for using it due to the advancements in technology.