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jan 1, 1727 - The Second Process

Description:

In 1727 the second process needed was chemical. Johann Heinrich Schulze discovered that when exposed to light some chemicals change color. Modern Photography is based on his discovery.

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Photography History

ByBRADLEY B SASSE
20 Feb 2018

Date:

jan 1, 1727
Now
~ 297 years ago
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