What it is: Not allowing light to pass through; not transparent or translucent. How to use it: A polish that is opaque will give a solid color. Blacks and whites are always opaque and any color mixed with them will become more opaque.
What it is: The measurement of the thickness or thinness of a liquid and this affects the speed with which the fluid flows. How to use it: The thickness of liquids in the nail industry is referred to as its viscosity, thin, medium or thick – can refer to gel polish, nail polish, gel paints, oils and resins.