It sounds as if you are saying that it is "time is money" driven. The C41 process consists of the type of emulsion and developer that has been arrived at and we the users are not in a position to use the "wrong" temp with the existing process but in your opinion Kodak and others could have devised another process that would work at say room temp There is no inherent reason why it has to be 38C. It isn't governed by any absolute laws of chemistry or physics in the way that at sea level the boiling point of water can only be 100C
Originally Posted by Rudeofus
Have I understood your reasoning correctly?
As far B&W is concerned the limits are much greater than we currently use. We could go to 38C and at these temps the emulsion wouldn't be seriously compromised any more than it is in colour neg development? Presumably if 3 mins 15 secs doesn't create short development problems for colour then it wouldn't for B&W?