Natural Ocher known for working in acrylic: Sienna is suitable for use in acrylic, however we do not recommend working with this pigment with Dispersion K 52 (#75075) as it flocculates in this acrylic binder.
Sienna, French is suitable for Tempera, Watercolour, Ceramics, Cement / Tadelakt, Oil, Silicate Binder, Acrylics, Lime / Fresco.