Today we used really good quality heavyweight watercolour paper.
We tried a contact test strip with tests from 1 minute to 6 minutes:
You can see that the 6 minute exposure is on the left and the 1 minute exposure is on the right. We decided that the best results in terms of deep blue and pure white was either 2 or 3 minutes.
The best result was at 3 minutes:
In the morning Mike Futcher had a go at printing onto the lower legs of a pair of zip off trousers. The result was fantastic. Here are some action shots from the process: