Sunstrike light box.

Senior students from girls high are waiting for their turn using the lightbox to expose their negatives over the solarplate.
I use a 10" x 8" carry board, covered with red felt, the new piece of solarplate, a piece of 5 mm clean glass then placed under the light box. We were able to expose for 2minutes 15 seconds, 8 images, (5" x 4"), at a time, so we didn't have to wait long for our turn.