This fact is from Waxes & Polymers in Dental Materials. It is a commonly tested concept in NEET MDS examinations. Understanding this fact is crucial for answering MCQs correctly.
PMMA = polymethyl methacrylate = heat cure acrylic denture base
Porosity types in acrylic: Gaseous most common, Contraction, Granular
Inlay wax = type 1 direct type 2 indirect
Baseplate wax = Type I
Modeling wax = impression compound
Pour type acrylic = fluid resin.