Over the last couple of weeks we’ve been making the molds of the cranium of Buttercup, our reconstruction of a baby Diorocetus from Carmel Church. Last week we poured silicone on the dorsal side of the cranium. This took a total of five coats of silicone; the second coat is shown above.
After the last silicone coat on the dorsal side had cured, Ray and Christina added a fiberglass and plaster mother mold so that the mold would hold its shape, and we could finally flip it over:
All the brown lumps that look like rabbit droppings are clay that was used to level and seal the cranium when it was dorsal-side-up. All of this clay is removed, except for plugs in the skull openings, the pour spout at the front of the skull, and the walls of clay around the outside edge:
After a coat of mold release (to keep the two halves of the mold from sticking to each other) we can start pouring silicone on the ventral side, hopefully tomorrow.