After many trials, I printed my first actual attempts at making photos yesterday. Some tweaking is still in order (the midtones are greyer than I would like), but generally speaking, I'm quite pleased at having achieved crisp whites and dark, velvety blacks--or blues, I should say.
This view of the Transamerica Pyramid, in San Francisco, was done on Arches Platine paper using the traditional cyanotype formula, coating the paper twice. 15-minute exposure. Processed in water with one tablespoon vinegar/quart of water for one minute. Then rinsed in a bath of one tablespoon hydrogen peroxide/quart of water for 30 seconds. Washed 15 minutes. Off to a good start. :)
[My very first cyanotype was actually more than two-and-a-half years ago. Here's a link to a comment about that attempt.]