Mixing pairs: cadmium red and lamp black

M. Gra­ham cad­mium red (a cad. red light), M. Gra­ham lamp black, and Rem­brandt tita­nium white.

I posted a swatch yes­ter­day with ver­mil­ion and lamp black. Although ver­mil­ion and cad. red look very sim­i­lar, they mix quite dif­fer­ently with black. When mixed with black, cad. red makes dull pur­ples rather than dull mauves as ver­mil­ion does.