Organic pigments appear relatively late, although natural diamonds were mixed in inorganic matter (such as red) for artistic color (such as deep melon and crimson) in the Middle Ages, but the real organic pigments were present at the beginning of the 20th century. For both types: plant pigments and animal pigments. Pigment Properties Inorganic Pigments Organic Pigments Common High Performance Colors, Purity Often Brightly Normal Opaque High Number of Some Transparent Coloring Low to Medium Very High Light Fastness (in blue) Good to high (7-8) Low to medium (<7) Good to high (7-8) Weatherability different (related to chemical structure) Not enough Medium to high heat resistance Usually> 500 ° C Very little <200 ° C 150 -220 ° C 200 -300 ° C Fastness in Solvents - Impermeability High to Good Chemical High Stability (High in Chemical Resistance) High (except in salt) High Prices Low to Medium Medium High
Although the inorganic pigments are natural products, they need to be modified for the manufacture of pigments. All white pigments are inorganic and widely used in color blending.
Organic pigments are usually transparent, however, modern manufacturing techniques can provide a variety of properties without having to rely on their chemical properties, for example, we can now produce highly opaque organic pigments.
Pigment characteristics Pigment is a kind of colored fine powder powder material, generally insoluble in water, oil, solvents and resins and other media, can be dispersed in a variety of media.It has hiding power, color strength, relatively stable light, Commonly used in the preparation of coatings, inks and colored plastics and rubber, and therefore also known as colorants. Pigments are organic or inorganic, colored, white or black material, dispersed in the medium almost insoluble. Color pigments are divided into organic and inorganic The characteristics of each of the past can be used to distinguish its type.
