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Four-panel comic. A tourist squints at red cliff paintings; a lab IDs hematite, lime, and blood; an ancient painter mixes binder; a skeptic holds three sample chips.
Cool chemistry. Don’t write the whole origin myth from three chips. · Original comic, Culture desk. News: The Art Newspaper, Aug. 18, 2026.

Culture and Curiosity

Huashan rock paintings stayed red for 2,000 years because the paint included blood

Shandong University researchers led by Meng Wu say the bright red Huashan rock paintings in Guangxi’s Zuojiang River Valley stayed vivid for about two millennia because the paint included blood. Unesco-listed cliff murals (roughly fifth century BC to second century AD) sit on limestone in a hot, humid monsoon climate. The team sampled fragments from three of more than 80 sites. Red clay rich in nano-hematite was the pigment, with a lime-and-blood mortar as binder. Slated for the Journal of Archaeological Science. An outside specialist said the childbirth-blood claim is the weakest part.

Source: The Art Newspaper