Hi King, The following is a great study investigating solvent compatibility with PDMS: J. N. Lee, C. Park, and G. M. Whitesides, "Solvent compatibility of poly(dimethylsiloxane)-based microfluidic devices," Analytical Chemistry, vol. 75, pp. 6544-6554, 2003. Kind regards, Chris Bliss -----Original Message----- From: King Lai [mailto:kinglai@egr.msu.edu] Sent: June 17, 2007 4:19 AM To: mems-talk@memsnet.org Subject: [mems-talk] Question on PDMS micro channels Hi all, I am planning to make micro channels and chambers by PDMS, but acetone/alcohol will flow inside the micro channels. I would like to know if acetone and alcohol attack PDMS channel. Did anybody has experience in using acetone in PDMS channel?