Hello all!

I made PDMS on a patterned silicon master; however after cross-linking at 50oC
overnight, the PDMS film cannot be removed from the master uniform and nicely;
in fact the master is gone and PDMS can only be removed partially so much so no
patterned PDMS can be achieved.

Does anyone have any idea how I can solve this problem and what is wrong with
the master? As usual I am using a 10:1 ratio of elastomer to cross-linker. For
another master I do not have the same problem and PDMS film can be thoroughly
removed from the master and nothing remains on master.

Thanks a lot!
Ali