Photography, without silver

Polaroid s film product technology was initially developed and manufactured by Kodak until Kodak decided it needed a comparable product and this required the invention of a different type of development chemistry. In Kodak s PR 10 Instant Colour films a B and W developer was used and its oxidised form, created by silver development, oxidised an immobile molecule called a redox dye releaser, which then released a mobile dye [35]. Where development occurred dye was released to a receiving layer and this required new positive working emulsions, described in Sect. 11.2.4. The arrival of digital photography provided an alternative to the gratification of instant photography without the limitations and expense of instant films so they have all but disappeared. 

Photography. No discussion of the uses of silver and its compounds could be complete without reference to photographic processes. That photography is responsible for the utilization of a considerable fraction of the annual production of silver is shown by the fact that the Eastman Kodak Company alone uses more than 300,000 lb of silver annually. 

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