Pull processing
Decreasing the effective speed of film, often to compensate for a mistake in setting ISO. It is usually done by decreasing the development time or the temperature of the developer.
Push processing is more popular than pull processing as photographers usually want to make a film faster, not slower. As such, the term push processing is sometimes used as a generic term for both push processing and pull processing.
Holding back
A technique that's also known as pull processing because you reduce the developing time of a film that received increased exposure in the camera.
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 See also: Exposure, Processing, Photograph, Print, Light
  
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