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123/L > Prelim | Procesing Room Design > Flashcards

Prelim | Procesing Room Design Flashcards

1
Q

Films are 2-8 times more sensitive when exposed to white light illumination and ionizing radiation

A

Principle of Latensification

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2
Q

Principle of Latensification

Films are (1) times more sensitive when exposed to (2) and (3)

A
  1. 2-8
  2. white light illumination
  3. ionizing radiation
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3
Q

What image do films contain?

A

Latent image (invisible)

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4
Q

Main function of the dark room

A

to prevent/ protect film from exposure to white light illumination and ionzing radiation during handling and processing

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5
Q

Location of dark rooms

A
  1. centrally located
  2. in proximity / near to exposure room
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6
Q

Size of dark rooms (general)

A

15ft * 9.5 ft or greater (min. of 10sq ft.) and can accomodate 200 radiographs/ day

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7
Q

Size of dark rooms (ceiling height)

A

2.7 - 3.3 m

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8
Q

Sections of the dark room

A

Wet and Dry section

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9
Q

Example of dark room’s wet section

A
  • Manual/ Automatic processor
  • Drying rack
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10
Q

Distance of the wet and dry sections

A

4ft away

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11
Q

What should be considered in a dark room’s construction?

A
  • Wall
  • Floor
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12
Q

Criteria for concrete wall construction

A

Greater than 6 inches [to absorb ionizing radiation] (3 3/4” in if added with lead)

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13
Q

Criteria for hollow block wall construction

A

filled with cement

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14
Q

Criteria for wood wall construction

A

with 1.5mm Pb (1/16 in)

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15
Q

Criteria for the color of walls

A

light/ bright tones (to reflect color of the safelight)

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16
Q

All criteria for the construction of wall

A
  • Concrete should be greater than 6in (3 3/4” if added w/ lead)
  • Hollow bolocks are filled with cement
  • Wood is with 1.5 mm Pb (1/16 mm)
  • Color: light/ bright tones
  • Light places
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17
Q

All criteria for the construction of floor

A
  • Should be non-slippery and free from any stored objects
  • Space should be sufficient for at least 1-2 persons to work inside the dark room
  • Chemical resistant
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18
Q

Example of chemical rsistant materials for the construction of floors

A

Tiles/ concrete ( easy to clean)

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19
Q

Types of entrances

A
  • Single door dark room
  • Light-lock door/ double door
  • Layrinth/ maze
  • Revolving door
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20
Q

Simplest type of entrance

A

Single door darkroom

21
Q

2-way exit/ entry way

A

Light-lock door/ double door

22
Q

zigzag entryway

A

Labyrinth/ maze

23
Q

fastest access type of door

A

revolving door

24
Q

one entry and exit way type of entrance

A

Revolving door

25
Maintains proper temperature and humidity
Ventilation
26
Types of ventilation
- Exhaust fan - AC - Electric fan
27
Storage room temperature
10-20° C / 50-70° F
28
Storage room and darkroom humidity
40-60%
29
Measures temperature
Thermometer
30
Measures humidity
Psychrometer
31
Types of lighting
- Whitelight - Safelight
32
Functions of the whitelight
- inspection and maintenance of cassette - cleaning work surfaces - servicing of equipment - changing of solution
33
Provides enough light to illuminate the darktoom while ensuring that the film remains unexposed
Safelight
34
Compositions of safelight
- incandescent (?) lamps with a color filter
35
What is the safelight's filter made out of?
Glass tinted with different colors
36
Has the capacity to emit all typess of light
LED Lamps
37
Safelight wattage
15 W
38
Distance of safelight
No closer than 1.5m (5ft) from the work space
39
Physics of light
Frequency of light is inversely proportional to its wavelength
40
Wavelength of the color red
Long ƛ at 700nm (low f)
41
Wavelength of the color violet
Short ƛ at 400 nm (high f)
42
Safelight filters
- Kodak Wratten Series 6B Filter - Kodak GBX Filter
43
Color of the Kodak WS 6B filter and what color it emit
- Amber filter (reddish yellow) - Emits orange-brown light
44
Color of the Kodak GBX filter and what color it emit
- Red filter - Emits dark red light
45
Transmits light that has a ƛ longer than 550 nm
Kodak WS 6B Filter
46
Transmits light that has a ƛ above 660 nm
Kodak GBX Filter
47
What type of safelight filter moves toward red? and what moves toward violet?
Towards red: Kodak GBX filter Towards violet: Kodak WS 6B FIlter
48
Compatability of the filter color of the safelight to the color sensitivity of the film
Spectral matching
49
Spectral matching refers to the compatability of the (1) of the safelight to the (2) of the film
1. filter color 2. color sensitivity

123/L (16 decks)

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