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
History of saffron robes were "triple"-dipped in deep purple dyes; for the robes of royal pretenders and commoners, the last two dips were replaced with a saffron dip, which gave a less intense purple hue. The ancient Greeks and Romans prized saffron as a perfume or deodoriser and scattered it about their public spaces: royal halls, courts, and amphitheatres alike. When Nero entered Rome they spread saffron along the streets; wealthy Romans partook of daily saffron baths. They used it as mascara, stirred saffron threads into their wines, cast it aloft in their halls and streets as a potpourri, and offered it to