lesson 1

Question 1

an enclosed area or room with dim light (safelight) or no light at all and lightproof from outside sources where film is handled and processed

Answer 1

darkroom

Question 2

relative humidity is maintained at around

Answer 2

40-60%

Question 3

room temperature maintained between

Answer 3

18-20 degree C

Question 4

types of entrance

Answer 4

• single door system
• double door system
• maze type system
• labyrinth
• rotating door system

Question 5

for blue sensitive x-ray films

Answer 5

wratten 6B filter

Question 6

for blue and green-sensitive x-ray films

Answer 6

GBX filter

Question 7

for 4 feet (1.2 m) distance from the loading

Answer 7

5-15w bulb

Question 8

two principal features occur when film is exposed to safelight for too long

Answer 8

• increase in grass fog
• overall loss of contrast

Question 9

blue light-sensitive film (400-500nm)

Answer 9

amber

Question 10

green light-sensitive film or orthochromatic (500-550nm)

Answer 10

red

Question 11

for panchromatic film (1200nm)

Answer 11

total darkness

Question 12

a flat, light-tight rectangle used to hold x-ray film and intensifying screen and backed by lead to eliminate scatter radiation

Answer 12

cassette

Question 13

size of darkroom

Answer 13

1m by 1.5m