Vierzon This week on The Artistic Biker Live! I played around with some Pebeo Setacolor Transparent paints.  Setacolor Transparents are photoreactive, meaning they interact with light.  According to the instructions, if I paint on a layer at a 1:2 mix with water, then put some masking material down and set it in a bright light, the paint will only set up where the light could hit it.  So I used my art journal and some scrap watercolor paper to test it out in studio.

http://dardogallettostudios.com/blog/2011/08/30/tango-workshops-pablo-veron-october-15th-16th/ You can see the results in the video at The YouTube, or in the embedded player below: