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.
There are different mediums in paintings that are used today. Artist's uses different kinds of mediums, they includes acrylic, pastels, fresco, gouache, oil tempura, water color and water miscible oil paint. Acrylic is a fast drying paint. It contains pigments suspended in polymer emulsion. Acrylic paints are usually diluted with waters.