Ivory Black (PBk9) is a bone-derived black with a slight warm brown bias, semi-transparent quality, and slow drying. Lamp Black (PBk6) is a carbon black with a cooler, bluer bias, greater opacity, and also slow drying. Ivory Black integrates more naturally into warm-toned paintings and produces warmer greys when mixed with white; Lamp Black gives cooler, more neutral greys. For portraits and figurative work, Ivory Black is generally preferred. For landscape and cooler-toned work, either can be useful.

Yes, many painters use Ivory Black as their primary or only black. It is a versatile darkening agent that works across most subjects. However, mixing French Ultramarine with Burnt Sienna or Raw Umber produces a richer, more chromatic dark that many painters prefer for shadow work because it retains colour interest. Some painters use Ivory Black for neutralising and tonal work while using blue-earth mixtures for shadow passages. Both approaches are valid.

Ivory Black is slow-drying, which makes it best suited for lower layers or for final glazes rather than as an intermediate layer over fast-drying paints like Raw Umber or Burnt Sienna. Applying a slow-drying paint over a fast-drying one is sound oil painting practice (fat over lean); the reverse (slow over fast) can cause cracking over time. In normal use for mixed-colour passages, this is rarely a concern. Take care when using Ivory Black as a thick final layer over relatively fast-drying under-layers without adequate drying time.

Yes. Art Spectrum Studio Blend Oil is the direct successor to the Art Prism range with new packaging and artwork only. The formula, pigments, and linseed oil base are unchanged. Art Prism Oil Paint 40ml Ivory Black and Art Spectrum Studio Blend Oil Paint 40ml Ivory Black are the same product.

For most painters, 40ml of Ivory Black is an appropriate size. Black is used sparingly in oil painting: a small amount goes a long way when darkening and neutralising other colours. Painters who use Ivory Black heavily for grisaille underpainting across large canvases may find the 150ml tube more economical, but for typical studio use the 40ml tube provides good working volume.