4 different recipes. Brands sell different pigment mixtures under this name, so they won't all look or mix alike. Compare the pigments below.
Who makes it
PBk9 Ivory / Bone Black + PR101 Red Iron Oxide1
- Rembrandt Artists' Oil Colour No. 718PBk9 PR101 PW6LF I OpaqueSeries 115 ml tube · 40 ml tube · 60 ml tube* · 150 ml tube*About Rembrandt
PBk7 Carbon Black + PY42 Yellow Iron Oxide1
- Lukas 1862 Artists' Oil No. 0190
Sizes are the ones each line is sold in; marks a size only some colors come in. Check the store for a particular color.