For the back-filming, and the cyanotype printing, I made some smaller 50mm cubes as this small size were not available to purchase. I cut the perspex with the laser engraver in the KSA 3d workshop, and was advised by a technician how to use dichloromethane in a syringe to weld the cut pieces together. He also very kindly made me up a small corner jig to hold the pieces in place while the acrylic weld was setting, so that I could do this in my studio. Some of the boxes were laser engraved with 10mm gridlines.