Hi Mikael,

Thanks for the reply. Surely it seems to be a peculiar problem. I am
particularly concerned about the duration of over curing of PDMS and its
effects- physical & chemical. Kindly let me know if you find anything.

Debashis.



On Mon, Jul 20, 2009 at 9:05 PM, Ulf Mikael Evander wrote:

>  Hi again.
>
> Thanks for the info! Hmm, this seems to be a problem for several people.
> I’ve seen the problem with uncured PDMS when using polyester and acrylic
> masters. I couldn’t really see that anyone got a good answer to why this
> happens. It’s kind of funny since everything else cures perfectly except the
> interface with the master.
>
> I personally think it would be hard to compare the baking effects of the
> photosensitive PDMS to the normal stuff, but there might be some clues in
> there. Previously, I’ve always kept my PDMS at a rather low temperature, max
> 70C, to avoid shrinking and stuck with a long curing temperature. I’m not
> sure if anything really will happen if you leave it in for too long.
>
> Cheers
>
> /Mikael

--
Debashis Maji, JRF,
School of Medical Science & Technology,
IIT Kharagpur, India - 721302