Principles Of Silver Recovery

Front 1

Unexposed and undeveloped silver bromide grains in the film's emulsion are removed by the what?

Back 1

the fixer solution

Front 2

Approximately how much is the silver in the film emulsion is transferred to the fixer solution?

Back 2

80% with 20%forming the radiographic image

Front 3

What are the four basic methods of silver recovery?

Back 3

1) electrolysis recovery method
2) metallic replacement
3) chemical precipitation
4) galvanic reaction

Front 4

What is the only method that permits the reuse of the fixer?

Back 4

electrolysis recovery method

Front 5

What method replaces the silver with a less valuable base metal?

Back 5

metallic replacement

Front 6

What method recovers the silver by adding chemicals to the fixer?

Back 6

chemical precipitation

Front 7

Why is it recommended that the chemical precipitation method be done in a separate facility?

Back 7

The chemical reaction generates obnoxious fumes and odor

Front 8

What method produces a electric charge chemically and then plating the silver onto cells?

Back 8

galvanic reaction

Front 9

How is silver recovered from film?

Back 9

1) strip the emulsion from the film with chemical and mechanical means and refine it
2) burn the film in a incinerator and process the ash to obtain the silver

Front 10

What is the most economical way to remove the silver from the film?

Back 10

Burning the film in a incinerator