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Organic Pigments Are Colored Organic Matter

  Organic pigments are colored organic matter, but not all colored materials can be used as organic pigments. To make colored materials a pigment, they must have the following properties:

  Bright colors, can be given to the coloring (or substrate) firm color;

  Insoluble with water, organic solvents or application media;

  Are easy to be uniformly dispersed in the application medium and are free from the physical and chemical effects of the application medium throughout the dispersion process and retain their inherent crystal structures;

  Resistant, weather resistant, heat resistant, acid and alkali resistant to organic solvents.

  The Similarities and Differences of Organic Pigments and Inorganic Pigments

  In recent years, the development of organic pigments is extremely rapid, because organic pigments have many unique advantages over inorganic pigments. Organic pigments by changing the molecular structure, you can prepare a wide variety, but also more than inorganic pigments more bright colors, more bright colors. Organic pigments also have much higher color strength than inorganic pigments, can be prepared with high tinting strength, high transparency of the varieties to meet the requirements of high-grade paint and printing ink. Most organic pigments are less toxic, and most inorganic pigments contain heavy metals such as chrome yellow, reddish, and red. Low-grade organic pigment varieties in the light fastness, weather fastness, heat resistance and solvent resistance and other aspects of inferior to inorganic pigments, but some high-grade organic pigment varieties (such as: quinacridone pigment, phthalocyanine Pigments, etc.) have excellent fastness to light, weather fastness, heat resistance and solvent resistance, and their acid / alkali performance is also better than inorganic pigments, because some inorganic pigments acid / alkali performance is poor, Such as: chrome yellow case of hydrogen sulfide will turn black, the case will turn red; group of green easily decomposed by acid. Organic pigments varieties, types, production and application are growing and expanding, has become a class of important fine chemical products.

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