One of the materials used in making theatrical teeth appliances is a liquid monomer that dissolves the dental acrylic powder; you will need to wear a good NIOSH-approved respirator that is rated for organic vapors whenever you are working with monomers. This protection will hopefully help ensure that your brain continues to function properly for years to come. Never use monomers near any open flame or sparking heat source, either. Monomer vapors are heavy and will seek the lowest point; do not use monomers in any room that has floor vents that lead to a heater or furnace or you could get to see your neighborhood from the air through thick smoke and flames.
If you will be casting acrylic in a silicone mold (and you will), you need to know that all silicones will absorb monomer. So, if you cast acrylic in your silicone mold more than twice in a row (in close succession), the silicone will swell, making the dentures you are casting thinner than they are supposed to be. Using
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a hair dryer (on low) on the mold for a few minutes will evaporate much of the monomer that’s been absorbed. The mold should be cool before you use it again. A spray release agent such as Frekote,® designed for molded polymers in silicone molds, will help prolong your mold life.