Using a process known as bulk polymerization, the monomer (methyl methacrylate) and the catalyst (typically organic peroxide) are poured into a mold, which is sealed and heated to produce the reaction that forms the acrylic plastic polymer. The molded acrylic sheets are then cured. Thinner acrylic sheets can be cured in 10 to 12 hours, but thicker sheets may require several days of cure time. The molds are then cooled, opened, and the resulting acrylic plastic sheets are either immediately used or further processed to improve the overall quality of the final product.
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