Radiographic Imaging II Unit 1 Processing
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40 terms
Terms | Definitions |
|---|---|
 activator | chemical in the fixer and in developer used to neutralize the developer and swell the gelatin |
| acetic acid | activator chemical in the fixer |
| sodium carbonate | activator chemical in developer |
| archival quality | referring to the fact that the image does not deteriorate with age but remains in its original state |
| automated radiographic table/chest unit | processing unit attached directly to the table automatically takes the film and runs in throught the processor |
| clearing agent | a chemical in the fixer that removes undeveloped silver halide crystals from the emulsion |
| ammonium thiosulfate | clearing agent chemical in the fixer |
| crossover assembly | devise in the automatic processor that transports film from one tank to the next |
| day light processing | automatic processor that takes the whole cassette in and opens it inside without the need for a darkroom |
| detector roller | the first roller int he automatic processor that rolls the film into the developer tank |
| developing agent | a chemical that changes (reduces) the silver ions to metallic silver |
| development center | the fromer sensitivity center, where the silver ions are collected and turned into metallic silver in the developer |
| fog | unintended optical density resulting from development of silver crystals that dont contain the image(over development) |
| guideshoes | device in the automatic processor that is used for steering film around bends/turns |
| hardener | chemical in the fixer that is used to re-stiffen the emulsion |
| gluteraldahyde | hardener chemical in the fixer |
| hypo | loose term for the fixing agent that removes undeveloped silver halide from the emulsion |
| labyrinth | darkroom opening system that is like a maze to eliminate light from getting in |
| latent image | the image made after exposure but before chemical development |
| latent image centers | sensitivity speck |
| manifest image | the visible image after processing |
| oxidation | the type of reaction that happens when electrons are produced |
| reduction | when a positive ion is reduced to a neutral atom (given electrons) |
| pH | measure of how acidic or basic a solution is (7=acidic 14=basic/caustic |
| Pi lines | processing artifact created when gunk on rollers gets deposited on film perpendicular to film travel in the processor (circumference of a circle/wheel=spi R) |
| planetary rollers | small rollers around the master roller that help move the film around bends and turns |
| precipitation | solid that results from a chemical reaction |
| preservative | chemical in the developer and fixer that maintains the chemical balance |
| sodium sulfide | preservative in the developer and fixer |
| recirculation pumps | pumps that inject fresh chemisty with every new film inserted into the processor |
| reducers | agents that give electrons, such as hydroquinone in the developer that supply electrons to turn the silver ion into metallic silver |
| replenishment | adding new or fresh chemistry with every inch of film |
| restrainer | chemical in the developer that restricts the development to exposed silver ions only, not unexposed silver ions |
| safelight | red light in the darkroom that is "safe" to expose film to without fear of development of fog |
| sensitometry | quality control procedure to compare film types and to monitor processor chemistry |
| solvent | what the chemicals are disolved in |
| water | solvent that is in both fixer and developer |
| squeegee | rubberized roller that removes excess water from the film prior to tank transfer |
| synergism | when 2 working together increase/enhance the action of both |
| turn around assembly | consist of the master roller, planetary rollers and guideshoes that move film from one tank to another |
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