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 the solution.
- 1,6-Hexanediol diacrylate (Aldrich 246816)
- Sudan I (Aldrich 103624)
- Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (Aldrich 511447)
- Computer with Powerpoint
- Magnifying glass
- Platform elevator