Exposures Review Flashcards
A reducing agent responsible for slowing the production of heavy densities.
Hydroquinone
An preservative that controls oxidation, buffer agent
Soidum sulfite
Hardens emulsion, reduces gelatin swelling
Glutaraldehyde
A restrainer designed to decrease reducing agent activity. also known for its antifogging agent.
Potassium
An activator used to produce alkaline pH. Also known as a swells gelatin.
Sodium carbonate
Another reducing agent that can rapidly reduce fine detail shades of gray
Phenidone
How much of silver bromide can be found in the emulsion.
95-98%
What percentage of silver iodide is found inside the emulsion.
up to 5%
What happens when a film is exposed to excessive amount of light inside a dark room
fogging occurs. fogging is a darkening of the film
Over development of a film, development at excessive high temperatures, deteriorated developer, prolonged or repeated inspection of a film leads to
Chemical fogging
If a film comes out grayish yellow or brown, where did the problem occur?
Excessive fixation or use of a exhausted fixer.
A film appears to have grayish-white scum
Incomplete washing
A uniform fogging found all around the film
Age fog
A variegated color pattern on the film
inadequate rinsing
Clearing agent used to remove undeveloped silver halides from emulsion
Ammonium
During the fixer this chemical is used to stop reduction and provide acidic pH.
Acetic acid
This chemical is used to harden emulsion during the fixing phase
Potassoium alum
A universal solvent
Water. Used to dissolve chemicals
A curve black or white line about 1 cm in length found film. Oven results from bending the film over the end of a finger.
Crinkle mark
a lighting or tree like black mark found on the film. Caused by static electricity due from friction between the film.
Static mark
Dark spots of various sizes found of the film because of migration of silver particles. Has a water droplet appear.
Water mark
A corresponding white mark found a radiograph. This is caused by foreign matter such as dust, hair, fragments of paper.
Cassette mark
Small clear circular spots on a radiograph. Results from formation of air bubbles in the developer.
Air-bell mark
[Part 1] As optical density increases,
mA, time, kvp, field size, screen speed, and processor time increase.
