Hi guys! 

I was hoping to see if anyone has any in depth info on the post curing of polyurethane.

I'm part of an artist duo working mostly on gallery shows and we've developed a keen interest in working with resins and epoxies. We have recently been experimenting with casting parts to build picture frames with - the longest sides being 25 x 35 x 800mm. So far so good, but I was wondering whether post-curing the parts would have any significant benefits for the strength of the parts? And if so, at what temperature and for how long?

All in all the parts for the frames are quite strong, but the stronger the better. We've been using the water clear polyurethane system, with a little bit of pigment. 

Kind regards

Maarten

Generally speaking there are benefits to be had from the post cure including improved mechanical performance and improved heat distortion temperature.  Although for many applications the difference in strength is not massive, it can be of help.  Depending who's resin it is, the manufacturer TDS should have a recommended post cure cycle. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant