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Author: Charlie Cooke
Photo size: 2.3 Mpixels (6.64 MB uncompressed) - 1549x1499 pixels (5.2x5 in / 13.1x12.7 cm at 300 ppi)
Photo keywords: 1 minute, chemical tests, cutting agent, marquis test, Sam Drake, starch powder, University of Derby
Published in: Chemical tests