Powdered dye concentrate soluble in turpentines and citric terpene. These are very powerful dyes and a little goes a long way. Smaller quantities available packed by volume in reusable, laboratory rated, storage containers with an internal sealer...
STUBAI - High alloy tungsten molybdenum high speed steel. This is Stubai's premium range with exotic (to Europe) handles anf probably the best grade of HSS used in turning tools.