Watercolor prepared with Cadmium Bordeaux inorganic mineral pigment, chemically cadmium sulfide and selenide. This is an historical pigment from contemporary age, it belongs to the group of cadmium reds and so was produced some decades after the introduction of the analogous yellow. Within the cadmium reds it's one having the coolest shade. Extremely lightfast, it owns high tinting strength, covering power and is very intense. It's one of the colors which shows a moderate drying shift.
It's incompatible with copper based pigments, which might darken because of hydrogen sulfide which it might free in time: avoid to combine it with Malchite, Verditer and Egyptian Blue.
Colouring agent: Cadmium Selenosulfide