Anna Atkins, Algae, cyanotype, 1843, Public Domain via Wikimedia Commons.

Just a Second: cyanotype

 Cyanotype (noun)

Blue photographic prints made with light-sensitive iron salts.  The process reproduces items placed directly on the paper.

The simple and low cost cyanotype process, invented by the renowned English scientist Sir John Frederick William Herschel, was often used by scientists to document their specimens.



One Comment

  1. Liz@PeaceLoveGuac

    I still remember doing that at the bday party when the girls were 5. 6? Such a fun idea!

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