HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Tartaric acid crystals, polarised light micrograph. Tartaric acid (C4.H6.O6) is found in fruits, especially grapes and is the principal acid in wine. It is used as a food additive, giving a sour flavour. Tartar acid is used to produce cream of tartar, which is used in baking, and Rochelle salt, which is used as a laxative and to silver mirrors. Magnification: x70 when printed at 10 centimetres wide.
Model release not required. Property release not required.