The first half mold finished. Plaster mother mold and silicone mold together.
Next half begins. Again, apply a clay blanket 1/4 to 3/8 inch thick to exposed object and mold. Remember, the clay will eventually become the shape of the poured silicone later. I carved some half-round indents onto the plaster in each corner to create an interlock with the 2nd half.
Ready for plaster to be poured; each mold boxed, with a pour sprue for the silicone. Seal edges of mold along the sides of the box to prevent leakage. Apply spray-on mold release liberally everywhere.
This whole 2nd half mold was another 6 sessions of work, about 4-6 hours each, or about three weeks of weekends and nights after work. My October, Happy. These are two good molds and now I hope to get some good product out of them.