Film Processing Flashcards
Conversion of latent image to manifest image
Film processing
Types of processing
Manual Processing
Automatic Proccessing
Film is moved from one solution to another by hand
Manual processing
Requires an electromechanical device called the automatic processor
Automati processing
Transportation of of film form one solition to another w/o manual labor
Automatic proccessing
Sequence of events in proccessing a radiograph
Wetting Development Stop Bath Fixing Washing Drying
Swelling of emulsion (15 mins)
Wetting
Manifest image from latent image (5mins/22secs)
Development
Termination of development (30sec)
Stop bath
Removal of remaining silver halide crystals and hardening (15mins /22secs)
Fixing
Removal of excess chemicals (20 mins/20secs)
Washing
Removal of water (30min/26sec)
Drying
Total of manual processing
> 1hr
Total of automatic processing
90 secs
Crystalizing of the foxer solution
Hyporetention
Most important processing solution
Development solution
Is converted to black metallic silver
Sliver halide crystals
Converts latent image to manifest image by breaking down in simpler form
Oxidation/reduction
Hight standard temp is
Increase in OD
Solution temperatire is
15.5 C to 24 C
Immersion time is _______ to OD
Directly proportional
Density of liquid compared to water
Specific gravity
Measure md by specific gravity
Solution concentration
Use to measure solution concentration
Hydrometer
Solution concentration should not vary by ________ from manufacturer’s specification
0.004
Solution concentration ranges
1.07-1.1
Solution pH range
10-11.5
Solution pH should not vary more than _______ from manufacturer’s specification
0.1
High pH , _______ OD
Increase
Hardens the emulsion
Fixer solution
Films should be clear in _______ sec at room temperature
10
Specific gravity of fixing activity
1.077 - 1.11