Wouters, J., & Verhecken, A. 1989a The coccid insect dyes: HPLC and computerized diode-array analysis of dyed yarns.. Studies in Conservation 34: 189-200.

Notes: The quantitative determination of selected dyestuff components by high performance liquid chromatography, diode-array detection and post-run data manipulation was used to recognize dyes on historic yarns prepared from Dactylopius coccus, Kermes vermilio, Kerria lacca, Porphyrophora hameli and P. polonica.