Color should be specified with an agreed reference and viewing conditions. A physical sample is useful because lighting, surface finish and translucency can affect the apparent match.
In Munsell notation, H denotes hue, V denotes value and C denotes chroma. These terms should not be interchanged. Transparency is also a separate appearance property: a material that transmits light is not necessarily white.
When choosing a colorant, consider dispersion, heat stability, light exposure and possible migration into contacting materials. Test methods and acceptance limits should be agreed for the application rather than assigned an unexplained rating scale.
Confirm color and functional requirements on the proposed compound and finished sample. A color match does not establish food-contact suitability, medical compatibility or weathering performance.
