Cyanotopes made by Anna Atkins in the period 1843-1855.
"Sir John Herschel, a friend of Atkins and Children, invented the cyanotype photographic process in 1842.[1] Within a year, Atkins applied the process to algae (specifically, seaweed) by making cyanotype photograms that were contact printed[1] "by placing the unmounted dried-algae original directly on the cyanotype paper"[5]."
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