In today's parlance, the process of eliminating a photographic material's residual sensitivity to light. Talbot originally fixed his papers with potassium iodide, potassium bromide or strong solutions of table salt. These converted the remaining unusued light sensitive silver salts into a relatively insensitive state; today these would be said to have been stabilised, for the salts remained in the paper. Herschel introduced hypo in 1839 as a 'washing-out' agent - it dissolved the remaining silver salts and allowed them to be removed from the paper. Today, the term fixing applies not to stabilisation, but rather to Herschel's washing-out, and is still generally done with hypo.
Chemical action following development to remove unexposed light sensitive materials from a film. This makes the image stable and insensitive to further exposure.
The removal of unexposed silver halides from the film during processing.
Chemical action following development to remove unexposed silver halides, to make the image stable and insensitive to further exposure. It must be noted here that if inadequate washing is done after fixing it will accelerate the degeneration of the print or film quality more so than usually occur over a given length of time.
A chemical action in photography to remove unexposed silver halide and make the image unresponsive to further exposure following development.