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Photography

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by

Angela Bae

on 29 January 2015

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Transcript of Photography

Photography
chemistry of
Before we begin
Look out for
PUZZLE
pieces!
What is a film
photography?
Layers of the Film

.
the Emulsion layer
Inside
Silver Halide Crystals + Gelatin
Silver Bromide Crystal
Ag+ + Br- AgBr
Perfect Crystal
Photons
Processing/Developing
Developer
Stop Bath
Fixer
Water
Developer
Fixer
Water
Stop Bath
Silver ions
Ag+ + e-
Silver metal
Ag
Sensitivity
spec
Dark room
+ Red light +
A mild acid
Neutralizes the alkali developer
Stops any more development of the silver crystals
1. Removes unexposed silver crystals
2.Harden rest of the crystals
Washed thoroughly to remove chemical residue
Photoelectric effect
"enlarger"
Clump of Ag
Less clump
(less light)
Translucent
Dark Image
"safe"
"redox reaction"

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