Book jacket: Chemistry

Challenge #141 in the The Art Director series. Hosted by jezsik.
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A publisher needs an image suitable for the cover of a high school chemistry book. The client imagines beakers and test-tubes but is equally interested in images of elements and compounds. The most important consideration is that the book not be confused with physics, biology or geology.
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Chemical Indicators
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Fluorescein, Methyl orange acid/alkaline and Methylene blue.
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Submitted: Wednesday, 11th September, 2013 14:16 (GMT)
Taken: Tuesday, 10th September, 2013
Focal length: 4.9 mm
Shutter speed: 1/50 sec
Aperture: F4
ISO: 50
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Views: 130
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