Figure 6 | Scientific Reports

Figure 6

From: Hunter-Gatherers Harvested and Heated Microbial Biogenic Iron Oxides to Produce Rock Art Pigment

Figure 6

Thermally-induced Color Change of L. ochracea Control Samples. A series of digital micrographs illustrating thermally-induced color change of L. ochracea. Samples were heated in oxidizing atmosphere in a muffle furnace, held for 3 h each. Munsell scores are provided. (a) Untreated (2.5YR 2.5/2), (b) 200 °C (2.5YR 2.5/3), (c) 400 °C (2.5YR 3/4), (d) 600 °C, (2.5YR 3/6), (e) 800 °C (2.5YR 3/6), (f) 1,000 °C (10 R 2.5/1). Scale 1 = mm.

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