Hello Flavio,
b&w slides on ORWO Duplicating Positive Film DP 3
I make direct positive images on ORWO DP 3 (slides).
I took the film, I photographed and then I process reversible black and white Orwo DP 3 film.
Duplicate positive image (DP 3) is not just as a positive image.
At the positive, the contrast is given by the contrast of negative film (0.6) X contrast of positive film (2.4) ~ 1.5.
At the duplicate positive Orwo DP 3, the contrast is given by the contrast of negative film (0.6) X contrast of duplicate positive Orwo DP 3 (1.6) ~ 1.0.
So, at the duplicate positive DP 3 the contrast is lower by ~ 33% compared to a positive image.
At the reversible black and white DP 3 the contrast is given by the contrast of of the reversible process of Orwo DP 3.
When I make tests to transfer motion films in digital (telecine), we concluded that the best information we have in the film:
- Negative;
- Internegative or interpositiv color;
- Duplicate positive or duplicate negative black and white.
In short, best information we have in the negative film or the multiplicate materials.
I make the tests with transfer motion films in digital (telecine) by ~ 1997.
In the positive film the information is poorer / distorted, there are areas in the image where playback is not reality.
Positive can not play the full range of the negative glow.
Possible problems can occur in open or closed areas in the image.
White appears as a burning in white and black as a black spot without details.
Back to images made on reversible Orwo DP 3.
The 2 photo they are totally different gen.
The image scale was be evenly lit and textile material has contributed to lack of contrast.
The image to the outside, the sky and the sun had I had less and I enter in the objective.
See the white spot on the housing „CAFENEA JUPITER”.
In the photo outside, although the range is higher than the glow scale reproduction is correct.
I hope to touch this.
George