I am plunging back into the world of mold-making and casting. I am not good at this, and I struggle with being precise and methodical (boring :-))! But I want to create useful molds of a few difficult pieces modeled in oil-based clay. I find this difficult, and would love to have help.
I sprayed the clay model with clear gloss acrylic before making a pourable silicone block mold. The mold is not completely 3-D, as the back is not enclosed. So the resulting resin cast is flat & must “lie down”. Not sure why I chose bright metallic copper powder in the mold; it is rather ghastly.
I had to slit more of the block mold than planned to remove the clay and be able to remove the castings. This first cast was made with old resin, and is fragile, with a rough pitted surface texture. The feet broke off in the mold, and had to be glued on! I hope the next cast, now curing, will be more successful.