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Flashcards in 8,18,25 Deck (58)
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1

Developer

Purpose of the developer is convert the exposed silver halide crystals into metallic silver grains ph is alkaline basic

2

What are two chemical in the developer

Metol/elon-builds up gray
Hydroquine-builds up black tones and contrast

3

Four functions in the developer

Developing agent
Preservative
Activator
Restrainer

4

Activator

Sodium carbonate

5

Restrainer

Potassium sulfite -keeps reducing agents from developing unexposed silver halide

6

Perservative

Sodium sulfite- prevent radio oxidation

7

5 steps to manual processing

Developing solution
Rinsing
Fixing
Washing
Drying

8

Developing solution temp and

68-70 degrees develop for 5 mins

9

Rinsing purpose

Remove alkaline developer before placing film in the fixer 30 seconds

10

Fixing purpose

Stops further development establishing
-removes unexposed underdeveloped silver crystals
-hardens the emulsion

11

Fixing agent

Ammonium thiosulfate - clears away unexposed silver halide

12

Acidifier

Acetic or sulfuric acid -stops development by neutralizing developer

13

Harder agent

Aluminum chloride or sulfide shrinks and hardens emulsion

14

Preservative

Sodium sulfite -maintains chemical balance

15

Darkroom

4ft away 15 watt bulb
Chemicals stirred and replenished daily

16

Manual chemical replenishment

Developer- 6oz added to am
Fixer- 3oz may need to remove some chemical

17

Automatic processing

Developer
Fixer
Wash

18

Temp and maintenance for automatic processing

For every 30- film 6-8 oz

19

Which term best describes the process by which the laten image visible
Reticulation
reduction
activation
preservation

B

20

Which of these is the correct processing sequence

Develop rinse fix wash dry

21

The basic constituents of the developer solution are

Reducing agent, activator, preservation restrainer

22

During which step of the processing procedure are the expose silver halide crystals reduced to metallic silver

Developing

23

Which ingredient remove the unexposed undeveloped silver halide crystals from the film emulsion

Sodium thiosulfate p

24

Which ingredient causes the emulsion to soften and swell

Activator

25

Which ingredient Hardens the emulsion

Potassium alum

26

Chemically the developer used in an automatic processor causes more _____ then developer to use for manual processing

Hardener

27

Each of the following should be considered when setting up an ideal darkroom except

Black walls

28

What to the following colors of the safe light filters is safer processing all films speeds

Red

29

What is the minimum safe distance to position the safe light above the work area in the darkroom

4ft

30

What is the The appearance of the radiographic image if they film is exposed to a Safelite to long

Fogged