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The plate is covered in a light sensitive compound, containing Silver Halide crystals.
When light falls on the Silver-halide, it causes the silver atoms to clump together.
When developed with chemicals, the silver is left behind, causing dark areas where light has fallen. This makes a negative image, where light is dark and dark is light.
To get a positive print, simply shine light through the developed plate onto paper covered in the same Silver-halide compound.
After the same chemical process, the picture is reversed again giving the positive image.
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What is it called when you remember everything?
photographic memory??
Why do plate tectonics have names?
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photographic plate
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Output to a photographic plate.
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