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.

The setting of the precious metals prices once each day by the authorized dealers in London, England. The set prices are used by authorizied dealers to buy and sell precious metals for their clients.

The twice daily (10.30am and 3.00pm) meeting of the five fixing members in London during which time the gold price is fixed momentarily, providing a bench-mark price.

A method of determining rates by normally finding a rate that balances buyers to sellers. Such a process occurs either once or twic daily at defined times. Used by some currencies particularly for establishing tourist rates . The system is also used in the London Bullion market.

To fix a mosaic is to set it in its final location. The fixing process is the process of setting it in place if it has been laid out in the indirect method. If working in the direct method the laying and fixing process are done at the same time.

in the nitrogen cycle, it is the process of nitrogen changing into a less mobile and more usable form by combining with hydrogen to make amonia