Watch free video A touch screen rolls up by body heat

(1.03 MB) added on 27 May 2016 362 play times Fun Science Touchscreen Fun Things to do
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A touch screen rolls up by body heat

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Animation description:

A touch screen rolls up by body heat, and when cooled again. Image: Germany, late 19th century, rectangular, orange-brown, probably colored printed gelatin (in earlier times such images from the swim bladder of the fish Hausen were produced), rolls up on the palm or the breathing on by the body heat, golden print.