The compound, which is strongly colored, does bleach by dissociation which can be promoted by light (photodissociation) or by the interaction with the semiconductor. It is generally initiated by light and proceeds by interaction with the semiconductor thereby providing amplification.
The color sensitive elements are made of individual grains of transparent organic semiconductor with a cyan, magenta or yellow complex adsorbed on the surface of the grain. The grains are dispersed in such a way that each color is evenly distributed in the sensitive emulsion.
The system provides a color print of an original exposed imagewise to light containing wavelengths in the spectrum of absorption of the organometallic compound. Some molecules of the com-
pound are initially bleached in the area struck by the light. The process initiated on one grain, due to the interaction between the initial bleached molecule and the semiconductor, results in a completely transparent grain thereby providing amplification for the sensitivity (speed) of the process.