1. Processing room design Flashcards by Dana Athena Augusto

Darkroom Characteristics

-Room Humidity and
Temperature
-Construction
-Drainage and Water Supply
-Lighting and Ventilation
-Film and Chemical Storage

How well did you know this?

Not at all

Perfectly

the unseen change in the atomic structure of the crystal lattice that results in the production of a visible image

Latent Image

How well did you know this?

Not at all

Perfectly

The function of a radiographic ______ is to protect the film from white light and ionizing radiation during handling and processing

darkroom

How well did you know this?

Not at all

Perfectly

Countertops and other work surfaces
should be grounded to reduce the risk
of static electricity

-Proper Film Handling
-Maintaining the range of 30-60%
relative humidity

How well did you know this?

Not at all

Perfectly

Proper ventilation to prevent buildup

of heat and humidity

-Temperature should be maintained

in the range of 65-75°F (18-24°C)

How well did you know this?

Not at all

Perfectly

Darkroom walls should be
painted in _____ and _____ to increase reflectance of light
emitted from the safelight

pastels,

light color

How well did you know this?

Not at all

Perfectly

Darkroom walls should have _______ to protect the personnel and
prevent fogging of the film

appropriate lead shielding

How well did you know this?

Not at all

Perfectly

Darkrooms should have adequate water

supply and drainage

-Old processors - hot and cold water
-Modern processors - cold water
-Adequate drainage - can handle
2.5x maximum outflow (10 gallons
per minute or 38L/min)

How well did you know this?

Not at all

Perfectly

Darkrooms should have adequate ______ for film and chemicals,
and appropriate film transfer systems

storage space

How well did you know this?

Not at all

Perfectly

Darkroom door should be designed to
keep people from entering the room
while the films are being processed

Single-hinged door
Double door entrance
Revolving doors
Maze-type entrance

How well did you know this?

Not at all

Perfectly

Simplest and cheapest

Single hinge doors

How well did you know this?

Not at all

Perfectly

Weather stripping around door frame

Single hinge doors

How well did you know this?

Not at all

Perfectly

Can cause accidental exposure to white light

Single hinge doors

How well did you know this?

Not at all

Perfectly

Has 2 doors and a hallway

between them

Double door entrance

How well did you know this?

Not at all

Perfectly

One cannot be opened unless

the other is closed

Double door entrance

How well did you know this?

Not at all

Perfectly

Can cause accidental trapping

Double door entrance

How well did you know this?

Not at all

Perfectly

Most efficient but the most

expensive type

Revolving door

How well did you know this?

Not at all

Perfectly

Composed of 2 cylinders, a fixed outer cylinder, and a

revolving inner cylinder

Revolving door

How well did you know this?

Not at all

Perfectly

Does not use a door at all.
Instead, there is a minimum of 2
hallways that run parallel to each other

Maze-type entrance

Takes up too much floor space

Maze-type entrance

No restriction in area access

Maze-type entrance

Darkrooms should have 2 types of lighting:

the overhead lights and

safelights

necessary for
cleaning, maintenance, and possible
emergencies

Overhead lights

a light source that emits
wavelengths to which particular types
of film are not sensitive

Safelight

Safelight must be mounted at least _____ from feed trays or loading counters

3-4 ft

A _____ bulb is | recommended for single emulsion film (Safelight)

7.5W or 15W

Common type of film used in screen cassettes

Blue-Violet sensitive Film

is primarily sensitive to | the colors blue, indigo, and violet

Blue-Violet sensitive Film

Blue-Violet sensitive Film normally uses a _____ safelight

amber colored

Blue-Violet sensitive Film | Common types of filter are

Kodak Wratten 6B or Kodak Mor-Lite

Generally sensitive to the GBV portion | of the visible spectrum

Orthochromatic Film

Orthochromatic Film normally uses a _____ safelight

pure red

Orthochromatic Film | Common types of filter are

Kodak GBX series

Generally sensitive to red-amber light | spectrum

New Modality Film (Red-amber sensitive film)

New Modality Film normally uses a _____ safelight

dark green

New Modality Film | Common type of filter is the

Kodak Number 7

Sensitive to all colors of the visible spectrum

Panchromatic Film

Cannot be exposed to any safelight

Panchromatic Film

Safelight testing should be done

semiannually

Safelight testing should be done ____ frequently if problems are found

Safelight testing should be done if ____ are changed

filters

Safelight Testing

1. Verify proper distance, check bulb wattage, and inspect filter for cracks and pinholes. 2. Load a cassette with fresh film 3. Place the cassette on the radiographic table with 40 SID 4. Place the step wedge on the center of the cassette and expose. 5. In the darkroom, lay exposed film on counter and cover half with an opaque material. 6. Expose the film to normal safelight conditions for 2 min and then process film. 7. Place film on viewbox illuminator and observe for defined line or break between halves.

Leakage testing and | Processing Area Condition

1. Turn on all white lights surrounding darkroom. Inside the darkroom, shut off all lights. 2. After eyes adapt to dark, check for white leaks. 3. Turn on overhead lighting and inspect area 4. Check ventilation and temperature of area. 5. Check film storage area. 6. Correct any problems or deficiencies.

Films should be stored in areas with a temperature of _____ and a relative humidity of _____

55-75° F (13-24°C) , | 30-60%

Chemicals should be stored in areas with a temperature of ______. Temperature should not exceed ______ for long periods

40-85°F(4-30°C), | 70°F(21°C)

It is best not to store film and chemicals | _____ each other

near