EX1; Film Processing and Darkroom Flashcards
What are the 5 steps to manual film processing
development rinse fixation wash dry
What material are the tanks for manual processing
stainless steel
This serves as a rinse and maintain required temp
water
What are three advantages to manual processing
cheap
lasts “forever”
easy to maintain
What are four disadvantages to manual processing
temperature is not regulated
need time-temp chart
drying cabinet
developer contamination
What are two advantages about rapid processing
no dilution necessary
instant; develops in 15 sec, fixes for 15 sec at room temperature
what are three disadvantages to rapid processing involving the process of making it
solutions only last about 2 days before oxidizing
usually used with chair side darkroom
sensitive to variables (time)
what are some disadvantages to rapid processing involving viewing the image
lower contrast
may discolor over time
need to be fixed and washed after viewing
What are the four steps to automated processing
development
fixation
wash
dry
How long does it take for automated processing
4-6 minutes/cycle
Automated processing delivers consistent what
density and contrast; less human variables
This eliminates the need for a darkroom with automated processing
day light loader
This is added to automated processing to minimize the swelling of the emulsion so the films can be transported by the rollers uniformly
sulfate
What would occur if you placed the manual processing developer solution in an automated processer
film emulsion will most likely stick to the rollers and damage the radiographic image
True or False
The automated processor is continuous feed and can process all sizes of film
False; it can only process 0, 1, 2, and 4
How can an automatic processor have continuous automatic replenishment
attachment to sink;
also allows larger films to be processed
True or False
There are many different automated processor systems
True
What are the different types of dark room entry designs
maze-type
double door
spring mounted door
revolving door
This filter is used as a safelight
GBX2 (ruby red) filter
This filter is used as a safelight but is unsafe for panoramic radiographs
ML-2 (orange)
What three factors affect a safe light
color
wattage (7.5 to 15)
distance
Where is the best location for the safe light
4 feet from the surface of where the films will be handled
best place = right of fixing tank
How would you test for safeness in a dark room
place a coin on an unexposed and exposed film - 2 minutes
process
and if outline of coin is present, the safelight is broken
