These liquid concentrate dyes from Botanical Colors are convenient, easy to use and produce beautiful, harmonious colors. Each dye is pre-extracted from a leaf, root, bark or other natural source and has been used for generations by cultures all over the world to create humble to heirloom textiles. The work of extracting the color has been done for you. All you have to do is mordant the fabric and start the dye bath! 
Dyes have a shelf life of about 3 years.

• Saxon Blue liquid indigo: a striking easy to use blue from the indigo plant, this recipe dates to 1740. Works best on wool fibers, and satisfactorily on silk; however we have, on occasion, observed color instability on silk fabrics. On cellulose fibers the color will be quite pale and unstable.