C41 film processing at Colour Factory August 31, 2012 | 0 Colour Factory is very excited to announce that we now have dip and dunk C41 negative film processing facilities!! Currently we are only processing roll films, however we will have 4 x 5" processing up and running shortly. See Professional Film Processing Page For More Details Posted in Film Cameras, Fine Art Printing, Photographic Fine Art and tagged C41 processing, dip and dunk, negative processing