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How Did Johann Heinrich Schulze Influence Photography

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Johann Heinrich Schulze | Encyclopedia.com

    https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/johann-heinrich-schulze#:~:text=Johann%20Heinrich%20Schulze%201687-1744%20German%20physician%20and%20anatomy,that%20silver%20salts%20darkened%20when%20exposed%20to%20sunlight.
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Johann Heinrich Schulze | Encyclopedia.com

    https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/johann-heinrich-schulze
    Johann Heinrich Schulze. German physician and anatomy professor who made a significant discovery in the development of photography when he observed that silver salts darkened when exposed to sunlight. In 1725, while attempting to create a phosphorescent material by combining chalk with nitric acid containing dissolved silver, Schulze noticed that sunlight turned the …

What contribution did Johann Heinrich Schulze make to …

    https://www.quora.com/What-contribution-did-Johann-Heinrich-Schulze-make-to-the-field-of-photography-in-the-early-1700s
    Alexia Dennis. Author has 4.9K answers and 616K answer views 7 mo. discovering that silver salts darkened when exposed to light. In 1724 Johann Schulze conducted an experiment with silver and chalk that proved this mixture produced a better photographic effect than simple untarnished silver. Still, the end result was not completely desirable, because the silver salts …

Johann Heinrich Schulze - Wikipedia

    https://en.wikipedia.org/wiki/Johann_Heinrich_Schulze
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The precursors: Johann Heinrich Schulze | Camera Museum

    https://www.cameramuseum.ch/en/discover/permanent-exhibition/the-origins-of-photography/the-precursors-johann-heinrich-schulze/
    However, it was at the time of the Renaissance that alchemists discovered silver chloride, when a certain Fabricius noticed in 1566 that it turned dark blue in the light. The first scientific study on the reactions of certain chemical compounds of silver was published in 1727 by Johann Heinrich Schulze, a German professor of anatomy interested in chemistry, who was certainly the first to …

Johann Heinrich Schulze | German physician | Britannica

    https://www.britannica.com/biography/Johann-Heinrich-Schulze
    In history of photography: Antecedents …the German professor of anatomy Johann Heinrich Schulze proved that the darkening of silver salts, a phenomenon known since the 16th century and possibly earlier, was caused by light and not heat. He demonstrated the fact by using sunlight to record words on the salts, but he made no attempt… Read More

Professor J. Schulze - How did Photography Change our World?

    https://40369719.weebly.com/professor-j-schulze.html
    Professor J. Schulze mixes chalk, nitric acid, and silver in a flask; notices darkening on side of flask exposed to sunlight. This event becomes the accidental creation of the first photo-sensitive compound. makes "sun pictures" by placing opaque objects on leather treated with silver nitrate; resulting images deteriorated rapidly, however, if displayed under light stronger than from …

A History of Photography, by Robert Leggat: SCHULZE, Johann …

    http://www.mpritchard.com/photohistory/history/schulze.htm
    SCHULZE, Johann Heinrich. b. 1684; d.1744 Schulze was a German Professor at the University of Altdorf, whose experiments paved the way towards photography. Though it was known that certain chemicals darken when exposed to the sun, it was not clear whether it was the action of light or heat which had this effect.

Development of Photography: 18th century experiments; …

    https://www.people.vcu.edu/~djbromle/color-theory/lecture/9.html
    Johann Heinrich Schulze. c. 1717 - Discovery that powdered silver nitrate darkened upon exposure to light. This led to experiments, at first in the flask, later on paper, ... This made traveling photography a burdensome, dangerous affair. Nevertheless, exposure times were down to about 5 seconds and the clarity was excellent. ...

history of photography | History, Inventions, Artists, & Events

    https://www.britannica.com/technology/photography
    In 1727 the German professor of anatomy Johann Heinrich Schulze proved that the darkening of silver salts, a phenomenon known since the 16th century and possibly earlier, was caused by light and not heat. He demonstrated the fact by using sunlight to record words on the salts, but he made no attempt to preserve the images permanently.

Camera Obscura: Ancestor of Modern Photography

    https://www.encyclopedia.com/science/encyclopedias-almanacs-transcripts-and-maps/camera-obscura-ancestor-modern-photography
    Drawing on his understanding of the camera obscura, as well as the discovery by German natural philosopher Johann Heinrich Schulze (1687-1744) that silver salts are light sensitive, he began experimenting by coating paper with silver nitrate, then placing it in a camera obscura and exposing it to the Sun's rays. His experiments were unsuccessful—the image refused to hold …

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