Fig. 1.

( A ) Nonpolymerized sample wrapped with waterproof transparent plastic stretch film. ( B ) Thickness of nonpolymerized sample was measured using a digital caliper with accuracy of 0.01 mm to ensure a thin disc about ±1.0 mm. ( C ) Mass in air of nonpolymerized sample weighed using a digital weighing scale. ( D ) Mass in water of nonpolymerized sample weighed in beaker containing 100 mL distilled water using a digital weighing scale. ( E ) Nonpolymerized sample placed on a round plastic disc with diameter of 10 mm and thickness of 2 mm. ( F ) Sample was measured under Hirox 3D Digital microscope using optical method.