National Geographic : 1939 Sep
THE NATIONAL GEOGRAPHIC MAGAZINE NEWLY DYED YARN, SPREAD OVER POLES, DRIES IN THE SUN AT TEHRAN Natural dyes, extracted by old-time methods from roots, leaves, flowers, and certain animal products, still are used in Iran. Only in a few localities have synthetic dyes been introduced. SECRETS OF THE DYE POT GIVE TO IRAN RUGS THEIR LUSTER After the wool has been washed, it is dipped into one or more vats to attain the proper shade. Then it is hung up to drip and afterwards plunged into cold water.