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Rubber Duck MoldI made a silicone mold of a rubber duck, which I then cast using resin. Making the mold was tricky because rubber ducks have holes in the bottom, which can fill with silicone while the mold is being evacuated in the vacuum chamber. This is why my original two-piece mold failed. For the one-piece mold, I connected the inside of the duck to the outside of the using a straw. This allowed the duck to compress and then re-inflate without the air being replaced with silicone.
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