Original procedure developed by Nicholas Fang and adapted by
Joseph Muskin, Matthew Ragusa, Kungway Chang, and Ian McInerny
from the Center for Nanoscale Chemical-Electrical-Mechanical
Manufacturing Systems, University of Illinois, Urbana-Champaign.
See "Three-Dimensional Printing Using a Photoinitiated Polymer,"
J. Chem. Educ., 2010, 87 (5), pp 512–514. In this lithography
experiment light creates free radicals from
phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide which induce
polymerization of 1,6-hexanediol diacrylate. Light is supplied
by a computer projector which shines the pattern for one layer
at a time. After each layer, the elevator is slightly lowered
and the process is repeated. A dye (Sudan I) is included to
prevent light from penentrating much below the surface of This
experiment uses a computer with powerpoint and connected to a
video projector, a magnifying glass, mirror, and a platform
elevator. Adjust the focus so maximum sharpness occurs at the
elevator platform. Fill the beaker with monome