In 1818, Gmelin was one of the first to observe that
lithium salts give a bright red color in a flame. In 1826,
Jean-Baptiste Guimet was credited with having devised a process for the artificial manufacture of
ultramarine. Two years later, in 1828, Gmelin published his own process for the artificial manufacture of ultramarine. Since Gmelin was the first to publish this process, he received the recognition for this discovery. In his publication, Gmelin stated that silica, alumina, and soda are the main constituents of ultramarine and the rich color comes from sulfur. ==Death==