Actually ...... (as my niece was want to say when she was 6)
Until I discovered APUG and other internet resources, I had very little exposure to most of the historical processes. I have no problem with Instagram emulating cyanotypes - I just wish it gave credit for where the ideas for most of the "filters" originated.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
Thats awesome I was thinking of doing some nice cyanotype prints and frame them for small gifts but Christmas cards are such a cool idea, it also works well due to blue being a 'cooler' colour which would work well with a winter photo.