Cadmium orange is considered a "top 40 pigment" by the infamous handprint website handprint.com
Cadmium orange PO20 is a very lightfast, semiopaque, heavily staining, moderately light valued, very intense yellow orange.
This is REAL Cadmium not an imitation currently sold by commercial paint manufactures under the label of "Cadmium Hue" This is a single pigment paint with an unsurpassed pigment to binder ratio. The pigments are ground by hand into a gum arabic solution I created myself that allows the paints to be rewet with ease.
Naturally-occurring cadmium-sulfide based pigments were used as early as 1850 because of their brilliant red, orange and yellow colors, and appeared prominently in the paintings of Vincent Van Gogh in the late 1800s