Vulcanizing Black Resin vs 1:1 Mix

A general purpose resin tuned for 20 - 200 micron slice thickness
kai
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Vulcanizing Black Resin vs 1:1 Mix

Post#1 » Tue May 31, 2016 11:07 am

Hi,

we use currently the 1:1 mix for vulcanizing silicone rubber molds. This works fine for thicker models, but for filigree type items the model deforms because of the heat (170 celcius) and pressure. Does anyone have experience in molding thin models with black resin? Does the black resin have a better dimensional stability under heat?
We also use RTV rubber (Castaldo LiquaCast/ LiquaFast) but I miss the flexibility of silicone rubber.


Thanks for any comment!
Kai

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mikej
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Re: Vulcanizing Black Resin vs 1:1 Mix

Post#2 » Tue May 31, 2016 1:20 pm

The black will certainly stand up better to heat/pressure than the castable resins. Can't say for sure that it will work completely in your setup, but I'm sure you'll get a better result than 1:1 mix (or with any of the castable resins).
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Robert Howle
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Re: Vulcanizing Black Resin vs 1:1 Mix

Post#3 » Tue May 31, 2016 10:45 pm

I would try using RTV (room temp) silicone non shrink molding compound. There are many available. There is no pressure involved as the molds are poured and allowed to cure. The one I use involves two glass plates and a frame and a clamp.

Robert
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