Quote Originally Posted by pentaxuser View Post
Or is it the case that, commercial considerations aside, the likes of Kodak could have developed a satisfactory C41 process at 20C
I guess they needed a certain (high) rate of diffusion to make all three layers develop in lockstep, and 38C was the way to go. AFAIK some color negative process(es) before C41 could be run at room temperature, but for some reason C41 proved superior.