Resin to print model for aligners

What formlab’s resin do you prefer for printing models /not guides/? For guides I use clear resin.
I want to use the models for making aligners with pressure molding ministar s scheu dental.
Grey resin or Tough resin?

What is the temperature that resin can stand?


Depending on the state (Green or Post-cured) it will have different properties. Check out the datasheet for more info

The newest iteration of our Grey Resin (V3), has the highest feature resolution of any of our materials. Each of our standard resins have similar material properties and the datasheet linked by @aad345 is a great reference for mechanical and thermal properties.

For much of my work I have been able to go directly to organic rubber molds with the clear resin after it has been post cured.
Keep in mind my parts are relatively flat, coins, lapel pins etc. They are holding up fine under 25 tons of pressure at 310-320F for one hour.
I would think that under those conditions that the majority of the resins would perform somewhat similar and any differences would be hard to tell because the conditions exceed what the resins are designed for.

Use the V3 Gray Resin.
FormLabs claim it prints the most detail.

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I have a customer that is printing with Dental Model resin to make alligners. He says sometimes the alligners stick to the Model Resin. Is there any recommendation on a release agent to help the alligners from sticking to the resin? Any info will be appreciated. Thanks.

Hi, just wanted to chime in if you haven’t found a solution yet. I do a quite a few arches per week for invisible retainer fabrication and also found that the high temps of the pressure forming process would almost “weld” the hot clear material to the printed model. I had some Fractionated Coconut Oil on hand that is food grade and very thin viscosity that I applied to the model using a wide artist paint brush and it’s been working great for hundreds of retainers thus far. It only requires a tiny amount of oil to be applied, just enough to be seen. Great mold release performance that yields crystal clear results! I’m using this method with a 90psi Biostar. I tend to scrub model and retainer with a denture brush and liquid dish soap to easily remove traces of the oil. You may have fine luck with olive oil just the same, but don’t know how easily the cleanup would compare.

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Ryan, thanks for the response I appreciate it very much. I ended up finding a spray silicone made for dental molds and suggested that to the customer. I will also mention this to them next time they order some resins through us. Thanks again.

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