Hi Bill, AFAIK C41 push processing is done not by prolonging the time, but by changing the temp.
As to usability of pushing (ie increasing ISO sensitivity) of C41 film, I must second your opinion - that is it doesn't work. I have seen plotted curves of pushed C41 800 film, and it was apparent that aside from fog level, nothing changed. Even though, I have had asked for "pushing" C41 film now and then, just because IMHO it is easier to print than normal but one stop underexposed C41 (even if the shadow detail is the same). As to B&W, here I think pushing is entirely possible, actually even increasing the sensitivity, depending on the toe curve of the film, though. Good light Frantisek (a "Pusher" all the time in B&W <g>) - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
