First (semi) successful gum print

There are definitely more failures than successes so far. There are so many variables to this process that it is extremely important to be measured in what you have done. This was printed with Lamp Black (1.5g pigment/10ml gum arabic) and exposed for 1:30 minutes in bright sun. The highlights did not clear even after 30 minutes soaking in tepid water and needed to be aggressively sprayed to clear.

I am happy with the result but it is far from what can be called skill and still quite lucky.

I have just set up an Arista UV light source and can now be precise in the exposure.