Influence of Taoism on the invention of the purple pigment used on the Qin terracotta warriors Liu, Z. ; Mehta, A. ; Tamura, N. ; Pickard, D. ; Rong, B. ; Zhou, T. ; Pianetta, P. Abstract Publication: Journal of Archaeological Science Pub Date: November 2007 DOI: 10.1016/j.jas.2007.01.005 Bibcode: 2007JArSc..34.1878L