Archived posting to the Leica Users Group, 1999/09/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 05:04 PM 9/25/99 -0400, Dan Cardish wrote: >I can recall having to do that years ago when I was fooling around with >reversal colour processing (either E4 or an obsolete Agfa process). Part >way through, I had to remove the reel from the tank, and hold it a >specified distance from a known wattage bulb, for a certain length of time. > The end results were nothing to write home about. > >Dan C. > This has been the "standard" way of causing "reversal" in reversal film for decades. All slide film until the introduction of the E6 process has been "reversed" this way. I have "light reversed" thousands of rolls of film. The results are no different than "chemical" reversing that takes place in the E6 process. Disclaimer... I do not know exactly when the "chemical" reversal replaced "light" reversal, but it was about the time of E6 introduction. I started processing Ektachrome in 1953. Probably E3, but maybe E2. Too long ago to remember for this feeble mind. Jim