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QM Registry Ch.6
Silver Recovery
Question | Answer |
---|---|
Film images made before 1974 and containing 20% more silver than film made afterward | archival film |
Unit of weight in the English System more commonly known as the standard ounce | avoidupois oz |
A potential problem in certain metallic replacement silver recovery units whereby the fixer forms a straight channel that reduces efficiency | channeling |
Oldest form of silver recovery. In this method the mixing of such compounds as sodium sulfite and zinc chloride with used fixer can cause a chemical reaction | chemical precipitation |
The amount of time that the fixer solution is in contact with the active portion of the silver recovery device | dwell time |
A process in which an electric charge causes a chemical change in a solution or molten substance | electrolysis |
Film that has not been processed | green film |
A method of silver recovery from used fixer solution | metallic replacement |
A type of electrolytic silver recovery device that recirculates fixer back into the processor after silver reclamation | recirculating electrolytic unit |
Exposed and processed film that is not of diagnostic use and is disposed of for silver recovery | scrap exposed film |
A buildup of sulfur on the electrodes in an electrolytic silver recovery unit as a result of incorrect amperage setting | sulfurization |
An electrolytic silver recovery device in which the used fixer is removed for disposal | terminal electrolytic unit |
A unit of weight used for precious metals such as silver; 14.58 troy ounces = 16 standard ounces | troy oz |