This tile impression positive mold was made of nuts, bolts, washers, and cogs. The actual materials aren't there since this is made of plaster. The original mold was made of a water-based clay that was shaped by the original materials, all of which were lightly hammered into the clay and extracted using needle-nose pliers. (The parts clung to the clay and pulled away some of it. Lubricating the parts next time is probably a better plan for the future.) I used 6 inch wood pieces to block in the clay mold and contain the plaster cast.

Once the plaster dried over the mold, I painted the plaster with acrylic paints. To replicate the aesthietics of the original materials, I used a metallic acrylic paint mixed with blue or orange paints.

Nathaniel Yannikos. Tile Impression Mold-Building Parts. 10 October 2019. Plaster with Acrylic Paints. 1/2" X 6" X 6".

Nathaniel Yannikos. Clay Tile Mold Slab, 10 October 2019. Clay. 1/2" X 6" X 6".