There are three purposes of paint- protection, aesthetics, functionality.
Protection: When metal and wood is exposed to wind, rain, and sunlight, it may rust or rot. The paint on the surface creates a coating layer that can act to preserve and protect it.
Aesthetics: There are many painted goods like cellular phones, cars, etc. around us. A coat of paint is aesthetically pleasing and gives color and shine. Functionality: A coat of paint can provide heat insulation and/or resistance. An important factor in making these roles fully demonstrated is viscosity. The viscosity of the paint is related to ease of application, finish and long-term stability of the paint.
Viscosity of Paint
VISCO™ measurement examples
Spindl : A3L
Sample temperature : 30℃