Chemistry is the collective name for the solutions that are used to process radiographic films. Most Chemistry for dental use consists of two solutions, Developer and Fixer. Chemistry is a complex mixture of dissolved compounds. Developer has an alkaline pH. Developer contains agents to bring out the latent image; accelerators and restrainers to control the development of the latent image; preservatives to protect against oxidation; hardeners to protect the emulsion and buffers to maintain correct pH. Fixer has an acidic pH to counteract the alkaline Developer. Fixer contains agents that remove unexposed silver halide grains, thus making the image stable in light; preservatives to extend solution life; hardeners to protect the emulsion and buffers to maintain the correct pH.
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