Cyanotype Picture:
What is a cyanotype?
A cyanotype is a photographic printing process that produces a cyan-blue print. Engineers used the process well into the 20th century as a simple and low-cost process to produce copies of drawings, referred to as blueprints. The process uses two chemicals; ferric ammonium citrate and potassium ferricyanide.
Daguerrotype Picture:
Other daguerrotype picture:
What is a daguerrotype?
A daguerrotype is a photograph taken by an early photographic process employing an iodine-sensitized silvered plate and mercury vapor.
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