4.1. Dimensional Stability Tests
Water absorption and thickness swelling tests are conducted in accordance with ASTMD570-98[15], in
which the specimens are immersed in water for 2h and 24h, respectively, at a temperature 23±1°C. The
weight gain and thickness increase are measured after 2h and 24h the samples are removed from the water.
After 2h and 24 h water immersion tests, all of the specimens are weighted before and after the water
immersion test.