I have achieved at least one full stop, that brought up the shadows by using intensifacation, my film is litho, I have not done any tests on pan film, this method does work. a VERY LOW INTENSITY green light for 20 min, post exposure, ans then dev normally,the light should be at least 5 feet away,I used 2 polarizers and a green filter. I crossed the polarizers for a method of control, use no more than 15 watts. there is an increase in fog, every thing else remains of good photo quality. yours merrick,(posted 8082 days ago)