Tiedemann, E.J., & Yang, Y.Q. 1995 Fiber-safe extraction of red mordant dyes from hair fibers.. Journal of the American Institute for Conservation (JAIC online) 34(3): 195-206.

Notes: A new method was devised to extract red mordant dyes from wool fiber samples and was tested on several dyes, including cochineal dyestuffs (from Dactylopius coccus) having an alum mordant.