"Solaris Note Cards" by Dan Henderson

These cards are hand-made with a process called "wet cyanotype." A piece of watercolor paper is heavily coated with light-sensitive cyanotype chemistry. Before it can dry, botanicals, spices like tumeric, maybe some vinegar or a little peroxide is sprayed on, occasionally some wrinkled up food wrap is added. The assembly is placed under glass and exposed to the light of the sun for "awhile"...minutes, hours, days...As you can see, it is a very subjective and fickle process: sometimes something good results, other times not.