Exposures Flashcards
(29 cards)
Made of:
- Supercoat (Overcoat)
- Emulsion (2ble Emulsion)
- Adhesive
- BASE
- Adhesive
- Emulsion
- Supercoat
FILM
Protects the Film
Supercoat
Keep film uniform and together during processing
Adhesive
- Heart of the film
- Stores Latent Image
Emulsion
- Supports emulsion layer
- Transmits light to view image
- Non Inflammable
- Dimensionally stable
Base
Image on the film that CANNOT be seen
Latent Image
When Silver Ions migrate to negatively charged sensitivity speck (law of electrostatic opposites attract) and the Development process converts Silver Ions TO Metallic Silver Grains
Gurney-Mott Theory/Photoelectric Effect/Formation of Latent Image
Narrow Latitude = what gray scale?
Short scale/ Black and White
Wide Latitude = what gray scale?
Long scale/ Lots of grays
How fast film blackening occurs in an exposure refers to…
Film Speed/Screen Speed
The Faster the film the __________ the exposure.
What’s the benefit?
shorter. resulting in lower pt. exposure
Faster films can also produce images that are grainy , reducing ____ __________.
Image Detail
Film Speed and Screen Speed =
Relative Speed
(mAs1/mAs2)=(RS2/RS1)
Screen Speed Conversion (Inversely Proportional)
Name the Basic Components of Aut. Processor
- Feed tray
- Entrance Rollers
- Developer
- Fixer
- Guide Shoes
- Turn Around Assemblies
- Dryer
- Receiving Bin
6 Systems of Aut. Processor
- Transport System
- Temperature Control System (35 degrees)
- Circulation System
-Flud System:
depends on volume
&how much you use it
-Time Interval
dental or doctor’s office
4.Replenishment System - Dryer System
- Electrical System
-Mechanical Operation
4 Main Steps to chemical processing
- Developer
- Fixer
- Washer
- Dryer
What Developer Reducing Agent rapidly reduces fine detail shades of gray?
Phenidone
What Developer Reducing Agent SLOWLY produces HEAVY densities?
Hydroquinone
What Developer Activator produces alkaline pH, and SWELLS gelatin?
Sodium Carbonate
What Developer Rstrainer DECREASES reducing agent activity, and is an ANTI FOGGING agent?
Potassium
What Developer Preservative CONTROLS Oxidation and is a BUFFER Agent?
Sodium Sulfate
What Developer Hardener Hardens the Emulsion and REDUCES gelatin swelling?
Glutaraldehyde
What Fixer Clearing Agent REMOVES undeveloped silver halide from emulsion?
Ammonium
