Angewandte Chemie International Edition
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Inside Back Cover: Crystal Structures of the Hydration States of Pigment Red 57:1 (Angew. Chem. Int. Ed. 19/2012)
Like most journals and newspapers worldwide Angewandte Chemie International Edition is printed with Pigment Red 57:1. M. U. Schmidt et al. report in their Communication on page 4735 ff. that the actual shade of red depends on the hydration state and thus may change with the weather conditions. The crystal structures of the pigment in various hydration states have been solved by X-ray powder diffraction.