Agfacontour - before and after
In 1974, while still at school, I experimented with various techniques to produce “abstract” photographs. This example was created using Agfacontour, a technical film made to create equidensities. It has both negative and positive components, which, according to the exposure given produce black and white images of a given density. For example three separations could be made for each of the light, dark and intermediate tones.
This was a time consuming business, and the film was discontinued once it became possible to make separations digitally.
Having made the separations, I went on to add colour, giving each layer a different hue. I did this in two ways, first by making black and white negatives on lith film, and using the Tetenal toning chemicals to replace the black silver image with a dye layer, as in this example. Later I used 24 x 36mm images together with a slide duplicator and added different coloured light for each layer. This was done by keeping the shutter open and working in the dark.
This composite shows the original photo alongside the final Agfacontour result.
Agfacontour - before and after
In 1974, while still at school, I experimented with various techniques to produce “abstract” photographs. This example was created using Agfacontour, a technical film made to create equidensities. It has both negative and positive components, which, according to the exposure given produce black and white images of a given density. For example three separations could be made for each of the light, dark and intermediate tones.
This was a time consuming business, and the film was discontinued once it became possible to make separations digitally.
Having made the separations, I went on to add colour, giving each layer a different hue. I did this in two ways, first by making black and white negatives on lith film, and using the Tetenal toning chemicals to replace the black silver image with a dye layer, as in this example. Later I used 24 x 36mm images together with a slide duplicator and added different coloured light for each layer. This was done by keeping the shutter open and working in the dark.
This composite shows the original photo alongside the final Agfacontour result.