|Kodagraph Ortho Negative ON4 Reproduction Film|
Opening the box under a red safelight, two things were immediately apparent. The film does not have notches to identify which is the emulsion side, like most sheet film; examining it under the safelights, one side looked a lighter grey which I thought could be the emulsion side. There is also the possibility that the film doesn't have an anti-halation layer (no colour came out during pre-soaking) meaning that it wouldn't matter which side is used. Loading it into the film holders, the film base is much thinner than other sheet films I've used, and I initially picked up two sheets together before I realised that how much thinner it is.
|London 2012 Olympic Site, shot on Kodagraph ON4 rated at 6 ISO, developed in Rodinal 1:120|
For a second test shoot, I pre-exposed some of the film in the darkroom using an enlarger. Ansel Adams in The Negative describes using pre-exposure to improve shadow detail in high contrast scenes; I wondered if this would work for high contrast films. This can be done either in camera, or in the darkroom when loading the film. I exposed a sheet of film under an enlarger as a test, to find the shortest exposure which gave a discernible density on the film. I shot a number of sheets of the same subject, both with and without pre-exposure. However, the negatives from this second shoot I took out of the developer far too soon, with the result that they were all extremely thin, and as a result I haven't attempted to scan any of these. Part of the difficulty of tray developing film under a safelight is the fact that despite being able to see the image appear on the film as it develops, the film is still opaque until it is fixed, by which time it's too late to decide it needs longer in the developer, and this opacity can make the image appear denser than it is.
|London 2012 Olympic Site, shot on Kodagraph ON4 rated at 5 ISO, developed in Rodinal 1:100|
|London 2012 Olympic Site, shot on Fomapan 400, developed in Rodinal 1:50|
|Kodagraph ON4 rated 5 ISO, developed in Ilford Multigrade 1:30|
Ansel Adams, The Negative, 1981 ISBN 0-8212-1131-5