By Hanaldo - 10/13/2018 1:40:41 AM
Keep in mind that alginate is a water based product, and is actually only useable for a couple of hours while it is still very wet. Theres a lot of resins that wont like being poured into that, especially polyurethanes. Epoxies might cope, but depends on the specific epoxy, theres a good chance they will absorb water and come out very milky.
The ideal solution is to use a skin safe silicone instead of the alginate, but this will be significantly more expensive, especially for a one off project.
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