Ferns are featured in this boxed set of 8 assorted cyanotype greeting cards, all A2 (4.25” x 5.5") blank cards with 8 kraft envelopes. The set is packaged in a clear box. Made in West Chester, Pennsylvania.
 
A cyanotype is a photographic process founded in 1842 by Sir John Herschel mainly as a way of reproducing documents known as blueprints. About a year later, Anna Atkins famously used the cyanotype process to document physical algae specimens and became the first person to illustrate a book using photographic images. Cyanotypes can also be referred to as sun prints.