What is Cyanotype?

At this time of year, the Lake is a muddy brown, almost  black and white naturally. The filter that's been applied is Cyanotype, and it intensifies the contrast so that the lines dominate the picture.  Cyanotype is actually a printing process that is used for blueprints.   Here's the Wikipedia definition of Cyanotype:

1. "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: ammonium iron(III) citrate and potassium ferricyanide."
   
   
   
   
   

The Nerine Bowdenii flower (with the common names Spider Lily, Guernsey Lily, Cornish Lily and more) is naturally pink.  With the same process applied, it has the sense of being a blue lily.   There must be 7 or 8 common names for this flower - that's why it is good to know the latin name.  It seems so much more elegant an image with the monochrome colouring of the cyanotype.  What do you think?