Liquid Logwod 
 
Logwood Extract–Logwood (Haematoxylum campechianum) originates from the Yucatan region of Mexico. This is a  new, easy-to-use liquid logwood extract formulation.
Logwood yields a rich, deep purple and was used as a base or “bottom” for the desirable dark purple and black colors of European fashion and aristocracy.  It was in such high demand that in the 18th century, nearly all black dyed cloth was colored from Logwood. We use it today as a traditional textile dye, a laboratory stain and for dyeing sutures.
Logwood by itself is not particularly lightfast, so keep from bright sunlight. Its lightfastness increases and the color darkens to a near black with added iron. In addition, if your water is neutral or acidic, a little soda ash in the dyebath will enrich the purple tone on wool and silk fibers. 
 
25 grams of Liquid Logwood extract will dye approximately 250 grams of fibre  to a dark shade
Use Liquid Logwood at 10-15% wof for darkest shades
A tiny amount of Liquid Logwood at 0.5% wof will create silvery and smoky lavenders on silk.