Has anybody tried a cyanotype directly on an interior wall? That is something I've had in mind.
Most walls are quite basic, so you would at least need a good pre-coat of something to protect the cyanotype. It is also one the reasons why for example Prussian blue, as the pigment formed in the cyanotype process, is not used in something like acrylic and fresco-paint, as the alkali therein would ultimately destroy it.
(hm... that's odd, I thought I had responded to this the other day )
I tried this last year, using untreated wood. I got quite a nice image... at first. For some reason, though it would not rinse very well, and continued to darken for days after my experiment. What is left is a blue piece of wood with the vaguest hints of an image on it. I suppose I could have tried a bleach, but by that point I figured I had invested as much time in it as it was worth.
Anyway, good work. I see your persistence has paid off.
Tom, on Point Pelee, Canada
Ansel Adams had the Zone System... I'm working on the points system. First I points it here, and then I points it there...
An alternative to making it directly on the wall is making the cyanotype on a really thin piece of ceramic. It is cheap to make/have made and then You just need to make some kind of timer that will smash the ceramic at a given time ;-)
But why not make it interesting enough so that they will keep ordering and collecting You work.
If a man does not keep in step with his fellows it may be because he hears a different drummer... Thoreau