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"question miliput in a silicone mold (press mold)" Topic

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wardog03 Nov 2023 1:33 p.m. PST

i used the bluestuff /oyousu (spelling?)reusable mold stuff
for press casting with milliput its good .
but i find if a slight under cut the blue stuff doesnt take the under cut
i have also tried the silicone in a tube vinegary smell stuff
makes good molds with under cut ,but the miliput just slides out when i press it in ? , anything i can add to the silicone to make the miliput from sliding out ?

Zephyr103 Nov 2023 2:45 p.m. PST

It could be you need to adjust your pressing-in technique. Is your sil mold rigid enough to not be squashed when you press stuff in? I would try pressing in small amounts of milliput at a time (you don't need to wait for it to cure) to fill the mold (this also helps eliminate air bubbles) Trying to mash in a large amount at once is a hassle. Me, I cast most of my parts with plaster of paris/hydrostone, which is much easier… ;-)

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