The Reifschlager Gallery At The Rockwell Museum–pre 200l0

Frederick Carder claimed that he produced Rouge Flambé, a vibrant shade of red, by using selenium and cadmium sulphate in the glass melts. He also said that Rouge Flambé was one of the most difficult glasses he ever made. This is quite understandable, for a change in temperature could easily upset the chemical reaction taking place in the glass and change its color. It is quite obvious that there was some chrome oxide in the batch, too, and a close examination will reveal what appears to be tiny flecks throughout the metal. These tiny flecks, which give Rouge Flambé glass a pearly texture, are the molecules of chrome oxide adhering to one another and forming larger crystals that reflect light.

abstracted from American Art Nouveau Glass by Albert Christian Revi, p. 146

Examples