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![sd2016_0307](http://d3e1m60ptf1oym.cloudfront.net/d10bf737-9c6e-4fbe-9310-bda0cb3d1bad/sd2016_0307_uxga.jpg)
![sd2016_0205](http://d3e1m60ptf1oym.cloudfront.net/e286b182-4fdd-48d3-b954-85890932918a/sd2016_0205_uxga.jpg)
Author: Charlie Cooke
Photo size: 2.5 Mpixels (7.08 MB uncompressed) - 1561x1585 pixels (5.2x5.3 in / 13.2x13.4 cm at 300 ppi)
Photo keywords: 1 minute, chemical tests, cobalt isothiocyanate, crack cocaine, Sam Drake, University of Derby
![sd2016_0306](http://d3e1m60ptf1oym.cloudfront.net/33b2d762-bbba-4382-b29e-f7c504027a77/sd2016_0306_uxga.jpg)