Shrinkage

Dr. Snuts, M.D. · Post by **Dr. Snuts, M.D.** » Wed Jan 09, 2008 11:21 am

Is it the rubber that shrinks, the liquid plastic or both? Can this be avoided? Are there different types of materials that do not shrink? Is the shrinkage uniform?

rpauly · Post by **rpauly** » Wed Jan 09, 2008 12:14 pm

Depends on how cold the water is.

modelnutz · Post by **modelnutz** » Wed Jan 09, 2008 12:56 pm

My experiances taught me that Platinum cure silicones shrink the least.
As for shrinkage in the resin...totally variable...depends on type.
Smooth-On's site includes shrinkage factors for all thier silicones and urethanes.

Hope that helps...

Modelnutz

Treadhead · Post by **Treadhead** » Tue Jan 15, 2008 5:53 pm

modelnutz wrote:My experiances taught me that Platinum cure silicones shrink the least.
As for shrinkage in the resin...totally variable...depends on type.
Smooth-On's site includes shrinkage factors for all thier silicones and urethanes.

Hope that helps...

Modelnutz

Modelnutz

My concern is that when I'm casting a model in several pieces -- do the individual pieces shrink at different rates? This would be a real problem in having everything fit together in the end. What's your experience been?