
New Books in Intellectual History Michelle Henning, "A Dirty History of Photography: Chemistry, Fog, and Empire" (U Chicago Press, 2026)
Jan 22, 2026
Michelle Henning, a Professor of photography and media, dives into her book examining the deep ties between chemical photography, empire, and environmental impact. She reveals how photography's techniques were shaped by industrial capitalism and coal dependency. The discussion touches on how London's fog symbolized empire while complicating the photographic process. Henning also tackles the intersection of race and climate in colonial photography, alongside the environmental harms of major photography manufacturers. It's a thought-provoking exploration of visuals and their hidden histories.
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Photography As Material Industry
- Chemical photography's materials (emulsions, dyes, chemicals) shape how images are made and seen.
- These materials create global industrial networks tied to coal, empire, and extraction.
Factory Tour Revealed Film Sensitivity
- Michelle visited Ilford's original factory and saw how sensitive film production rooms are to contamination.
- She noted humans, light, metals, and atmosphere can all fog or ruin emulsions during coating.
Coal's Central Role In Photography
- Coal underpinned photographic industry through steam transport and coal-tar chemicals like synthetic dyes.
- Coal-derived dyes and emulsions altered film sensitivity and enabled mass photographic production linked to empire.

