i used to make liquid emulsions and use liquid light
and put them on glass plates. i did this for a good 3 or 4 years.
probably the best image i made from this series was on a 8x10ish sheet
of window pane, it was a big oak tree, with no leaves.
i made 2 prints from the big plate, and it fell on the floor
and broke into about 100 pieces.
soon after the shock wore off i took a piece of broken glass, covered
with foreign materials, and stuck it into my enlarger head
and that THAT, and it changed everything.