👉 Sudan fluid, also known as Sudan Black or Sudan Iodophore, is a black, viscous liquid primarily used in the textile and dyeing industries for its exceptional lightfastness and resistance to fading. It is a complex mixture of organic compounds, including phenols, aldehydes, and other chemicals, which provide its unique properties. Historically, Sudan fluid has been used to dye wool, silk, and other fabrics in vibrant colors that resist light-induced color loss, making it a valuable tool for producing durable and long-lasting textiles. Its use has declined somewhat with the advent of synthetic dyes, but it remains appreciated for its historical significance and specific application benefits.
