History
The E-6 process superseded Kodak's E-3 and E-4 processes. The E-3 process required fogging with light to accomplish image reversal and produced transparencies that faded quickly. The E-4 process used polluting chemicals, such as a highly toxic reversal agent Tertiary Butyl-Amine Borane (TBAB).
Read more about this topic: E-6 Process
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“The history of persecution is a history of endeavors to cheat nature, to make water run up hill, to twist a rope of sand.”
—Ralph Waldo Emerson (1803–1882)
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—Thomas Jefferson (1743–1826)