Hi All, I would like to use a micro moulding technique to cast a pattern into spun on polyurethane. I wanted to used a rigid material to pattern the negative easier to align. I was thinking of SU-8 using photolithography but I am not sure if the polyurethane would just simply peel of this. Another other suggestions of photoresists that would not adhere to polyurethane (PMC-790 by Smooth on) Darren Alvares Post-Graduate Student Graduate School of Biomedical Engineering University of New South Wales UNSW Sydney NSW 2052 Australia d.alvares@student.unsw.edu.au