Three Types of Acrylic Sheet

There are three main ways plexiglass is manufactured. Each style of plexiglass acrylic has its own advantages and disadvantages. This article will outline the differences.

Cell Cast Acrylic Sheet

  • This style is produced by melted liquid PMMA resin poured between two plates of glass
  • Least amount of expansion and contraction
  • Highest margin of error on thickness tolerance
  • Standard thickness tolerance from .118” - .500” is +/- 8%
  • This is the best material to use when cutting or routing
  • Highest molecular weight
  • Widest range of colors available
  • Standard material for signs, aquariums, and high-end fabrication

Continuous Cast Acrylic Sheets

  • This style is produced by pouring melted liquid PMMA resin between two belts of polished stainless steel
  • Best material consistency
  • Least amount of expansion and contraction
  • 2nd best thickness tolerance
  • Widest ranges of sizes available up to 9’ wide and 16’ long
  • Standard material for forming, fabrication, and skylights

Extruded Acrylic Sheets

  • Semi-soft melted resin is pushed between rollers and cut to size
  • Highest internal stress within the sheet
  • Most expansion and contraction
  • Generally, the best thickness consistency
  • Thickness tolerance +/- 10%
  • Softest sheet
  • Gums up routers more when cutting
  • Easy to glue
  • Standard material for displays, and replacement windows. Some signage applications.

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