Organic Pigment Physical Properties

Organic pigments are bright in color and strong in coloring power; they are non-toxic, but the light resistance, heat resistance, solvent resistance and migration resistance of some varieties are often inferior to inorganic pigments.
The variety of colors is endless and colorful, but there is a certain internal relationship between various colors. Each color can be determined by three parameters, namely hue, lightness and saturation. Hue is the characteristic that distinguishes colors from each other. It depends on the chromatographic composition of the light source and the perception of each wavelength emitted by the surface of the object on the human eye. It can distinguish red, yellow, green, blue, purple and other characteristics. Lightness, also known as brightness, is a characteristic value representing the change of lightness and darkness on the surface of an object; by comparing the lightness of various colors, the color can be divided into bright and dark. Saturation, also known as chroma, is a characteristic value indicating the shade of the surface color of an object, which makes the color different from bright and dark. Hue, lightness, and saturation form a three-dimensional scale, and using these three to establish a scale, we can measure color numerically. The colors in nature are ever-changing, but the most basic are red, yellow and blue, which are called primary colors.