Saffron (trade) by far the world's most important producer: in 2005 it grossed some of dry threads, or 93.7 percent of the year's global total mass; much of the Iranian crop was bound for export. Northeasterly Khorasan Province, which in 2004 was divided in three, grows 95 percent of Iranian saffron: the hinterlands of Birjand, Ghayen, Ferdows in South Khorasan Province, along with areas abutting Gonabad and Torbat-e Heydarieh in Razavi Khorasan Province, are its key cropping areas. During 2004, Iran was not a member of the World Trade Organization. and still until November 2009, Iran was again not a member of
Trade and use of saffron Research in China is ongoing. In Europe saffron threads were a key component of an aromatic oil known as "crocinum", which comprised such motley ingredients as alkanet, dragon's blood (for colour), and wine (again for colour). "Crocinum" was applied as a perfume to hair. Another preparation involved mixing saffron with wine to produce a viscous yellow spray; it was copiously applied in sudoriferously sunny Roman amphitheatres—as an air freshener. Books Journal articles Miscellaneous Trade and use of saffron Saffron is a key seasoning, fragrance, dye, and medicine in use for over three millennia. One of the world's most expensive spices