Cyanotype Experiment - UV LEDs
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.
| Make | Canon |
| Model | Canon EOS 5D Mark II |
| Exposure | 0.8 |
| Aperture | f/4.0 |
| Exposure Program | Program AE |
| ISO Speed | 200 |
| Date and Time (Original) | 2011:04:02 15:54:44 |
| Exposure Bias | 0 EV |
| Flash | Off, Did not fire |
| Focal Length | 24 mm |
| Quality | Fine |
| Metering Mode | Evaluative |
| Lens Type | Canon EF 24-105mm f/4L IS |
| Camera Temperature | 21 C |
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