I tried an experiment to see if UV LEDs would work to expose cyanotype sensitised paper, turns out they do. I used three puny standard LEDs, first within a centimeter of the paper to make sure something happened, after about five minutes they had left some good amber splodges. Then I set it up like this with the LEDs about 30cms from the paper and part of a floppy drive motor (probably) to leave an interesting pattern, left for about an hour. See the next picture for the result.
I’ll be getting hold of a 10W UV LED soon. This should make unreliable sunny days much less of a problem.
|Model||Canon EOS 5D Mark II|
|Exposure Program||Program AE|
|Date and Time (Original)||2011:04:02 15:54:44|
|Exposure Bias||0 EV|
|Flash||Off, Did not fire|
|Focal Length||24 mm|
|Lens Type||Canon EF 24-105mm f/4L IS|
|Camera Temperature||21 C|