Jean-Baptiste Guimet (20 July 17958 April 1871), French industrial chemist, and inventor of synthetic colors, was born at Voiron, Isère.
He studied at the École Polytechnique in Paris, and in 1817 entered the Administration des Poudres et Salpêtres. Jean Baptiste Guimet discovered a synthetic route in 1826. He finally prepared the synthetic lazurite, called ultramarine in 1828. and six years later he resigned his official position in order to devote himself to the commercial production of that material, a factory for which he established at Fleurieu-sur-Saône.
His son Émile Étienne Guimet succeeded him in the direction of the factory.