In Cairo's centuries-old Darb al-Ahmar district, Salama Mahmoud Salama's traditional dye workshop is a multi-colored hive of workers busy with all kinds of fabrics. They lay out the long, flowing threads, to be used for everything from handmade shoes to rugs and drapes, and dip them in large, hot color baths. They have no gloves or masks to protect them from the dyes and fumes. "We start by leveling the ...