The assumed symbolic role of red ocher, Dr. The Blombos discovery, not only of elaborate ocher processing but also of its mixture with marrow fat to produce a paint, rather than with plant resin to produce a mastic, argues strongly for its symbolic function,” Dr. Traces of ocher were left on the tools, and samples of the reddish compound were collected in large abalone shells, where the paint was liquefied, stirred and scooped out with a bone spatula. This was blended with the binding fat of mammal-bone marrow and a dash of charcoal.
These cave artisans had stones for pounding and grinding colorful dirt enriched with a kind of iron oxide to a powder, known as ocher.
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