Finishing elastic resin

Does anyone have good tips for finishing elastic resin? It’s quite difficult to sand down because it’s so soft and flexible.

I’ve previously frozen flexible resin and sanded it which helped a bit but it’s more difficult with elastic.

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@leonhart88 did you discover a good method since you asked here?

Or does anyone in this community have some tips on the surface finish of elastic?

If you cure it underwater, so the surface becomes fully hard, you can actually sand it quite well. We have produced very thin sealing parts with good success rates.

Not really. I’ve learnt to just be a lot more careful with how I slice and orient the part in PreForm in order to minimize supports.

I also always remove supports before curing for Elastic & Flexible because that’s the easiest time to do so.

Sanding complex geometry is difficult…but if you have a simpler geometry then sanding and/or freezing then sanding probably works well.

It also depends on what you mean by finishing… define “finished” :slight_smile:

Techniques also depend on geometry and intended use of the part. For example I’ve printed “skins” of products to glue around a hard resin simulating ovemolded products, then warping is less important because you glue the elastic part in place then… You can use less supports or remove them before post-curing.
I’m using 0.5 touch points now.

What I’ve discovered recently is to scrub the supports away with a toothbrush while wetting thoroughly with IPA over the finishing kit bucket (prior to post-curing)
It saves a great deal of time, but if “finished” means “no dimples visible”, it doesn’t help.

If freezing really stifles the material, why not removing the supports while frozen?
Haven’t tried this myself

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