Expansion of the binder from added water to the investment is called _____ expansion.

Question

Quizplus · Accepted Answer

Hygroscopic expansion is the expansion of a material due to the absorption of water. In the case of investments, the addition of water causes the binder material to expand, creating space for the wax to be replaced by metal during casting. Thermal expansion is due to temperature changes, chemical expansion occurs due to the reaction of chemicals, and burnout refers to the process of eliminating the wax from the investment.

Expansion of the Binder from Added Water to the Investment