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Alternative Photographic Processes - (Hand made photographic -emulsions and processes)

Types of alternative photographic processes

There is a wide variety of alternative processes that can be utilized for making images, these can be grouped into three categories in terms of how the image is formed.

Light sensitive materials

In these emulsions the image is formed by the light sensitive chemical itself. Usually during the process there is a change in the chemical nature of the emulsion that alters the areas effected by light and allows the other areas to be reduced away leaving a recognizable image. So the tone of the image is actually formed by the chemical.

Infusion Pigment

In these emulsions the image is formed by a colour pigment mixed with emulsion. Usually during the process there is a change in the chemical nature of the emulsion that alters the areas effected by light and allows the other areas to be reduced away leaving a recognizable pigment image.

Transfer Ink or oil

Still others like Bromoil rely on the photosensitive materials, and process providing a matrix that either attracts or repels ink which in turn is transferred to a paper. So the image in this case is formed on the paper by ink.

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