Physical properties of sodium silicate-based substances make them very attractive for commercial/industrial use. Liquids and solids based on sodium silicate and produced by PQ Corporation have a density from 1.6g/cubic cm. to about 1.4 g/cubic cm.
A very big difference between acrylic and oil paint is the drying time. Acrylics dry in a matter of minutes to hours and oils dry in a matter of hours to weeks! This is a huge factor when choosing whether or not to choose oils versus acrylics.
The powder pigments are the same in both cases, but the medium used  to bind the pigments are entirely different. Watercolour paints are  finely ground, water soluble, gum b â¦ ound, and transparent. Acrylic  paints are ground the same as oil paints, insoluble once dried,  acrylic plastic bound, and opaque.