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Definition
Step 1: Greet 10 minutes
Step 2: Prep for Neg into 2,000 ft. rolls 30 minutes
Step 3: neg process 4,000ft/hr
Step 4: Hazeltine 1,000ft/15 min
Step 5: Print 10,800ft hr
Step 6: Pos Process 9,000ft hr
Step 7: Screen 120 fps |
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Neg
Fredrick Scott Archer 1851 Ambrotype uses glass, Colodion developer, MQ display, black backing |
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| Neg Louis Daugerre 1837 uses silver hallide prints onto copper plate, iodine coating sometimes gold plated. Couldn't make a replica of. Develop with mercury vapor. don't want to expose to oxygen. Exposure 5 min. |
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Term
| Describe and define "characteristic curve" and information represented within include all relevant terms. |
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Definition
relationship between exposure and density
toe shoulder marginal black marginal white
d min- base+fog
d max- fully exposed
(L.A.D.)
Slope= D/Log E
Gamma is found in straight line portion |
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Term
| Describe the difference between and functions of color couplers and sensitizing dyes in color film emulsions. |
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Definition
Sensitizing dyes play a part in translating the light energy and pass it onto the silver halide.
Color Couplers release color cloud dyes when activated by the developer. |
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Term
| Describe the process by which silver halides grains produce a color image. |
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Definition
1) light w/ sensitizing dye
2) reacts w/ silver halide
3) AgI developer react w/ color coupler
5. Ag is removed (leaving only dye) |
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| Exposure primarily allows for the measured capture and control of... |
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| Idea for rating emulsion sensitivity |
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| Instant polaroid pictures invented |
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| Invention of Color Couplers |
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Definition
| 1912 Fischer and Siegrist |
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Term
| Negative L.A.D. Standards |
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Definition
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| Outline detailed step-by-step plan to establish the exact sensitivity of a specific film emulsion, the proper exposure to create a perfect 18% grey card exposure and perfect print with predictable printing lights. Refer to LAD and the use of a densitometer. |
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Definition
Exposure test
process neg
find correct LAD
rerate film
shoot test @ new rating
print 25-25-25
Eastman: 27-27-27
FIND POS LAD |
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Neg
Hamilton Smith 1856 Tintype uses tin as base for prints. exposure cheap and affordable development MQ paint tin black for display. Iodione and silver nitrates suspension. Collodion developer |
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Term
| To what types of light is the native silver halide molecule sensitive |
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Definition
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Term
| What affect does push processing have on film? |
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Definition
Steeper Gamma and Shadows
Higher Contrast
Smokey Blue color |
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Term
| What are the differences between an optical printer and continous contact printer? |
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Definition
Optical Printer
Gate
Shutter
Lens Modification
slower
Contact Printer
Single slit of light
Exact copy
Faster |
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Term
| What color dyes are found in processed color film. Subtractive or Additive? |
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Definition
Cyan, Magenta and Yellow
Subtractive |
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Term
| What is a densitometer and why might a lab use one? |
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Definition
| A densitometer measures the opacity of a film stock. They can make sure their laboratory process meets L.A.D. standards. |
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Term
| What is a wet gate printer and why would you use one? |
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Definition
| A wet gate printer is a contact printer removes dust and hair repairs base scratches has three ways of printing total immersion, liquid gate and dip tank |
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Term
| What is gamma and where can it be found on a characteristic curve? How is it measured? How one can determine the properties of an emulsion by knowing the gamma of the film. |
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Definition
Gamma= Tangent = D/Log E
Contrast, Latitude
Gamma is the slope of a characteristic curve. It can be found on the straight line portion. The gamma is density over log E. By knowing the gamma of film it allows you to manipulate and correct it properly by using such a thing as a hazeltine. |
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Term
| What is silver chloride and how is it significant to the photographic process? What are the other silver halides? |
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Definition
AgCl Johan Schulze 1725
A salt made out of chloride binded with water turns to black when exposed. silver iodine AgI, Silver Brodine Ag br |
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| When exposing a scene, which three terms are the most critical in determining the proper exposure? |
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Definition
| Marginal Black, Contrast range of scene and film speed |
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| Why might it be important to use the same lab for a project whenever possible? |
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Consistency
1) processing due to chemistry
2) build relationship
3) consistency in printing |
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| development then allows for the control of... |
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| discovered the darkening of silver salts by the action of light. |
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