Pigments

Pigments are a range of materials that can change the color of reflected or transmitted light through wavelength selective absorption. The color of a pigment depends mainly on its chemical structure. The selective absorption and reflection of different wavelengths of light on the surface of the pigment determines its hue. Other qualities of a pigment that are usually required are tinctorial strength (which determines the amount of pigment required), insolubility, solvent resistance, durability, price, dispersibility, flocculation resistance, and chemical and thermal stability.

Some people usually think of pigments and dyes as being the same; they are both used to color different materials, but the way in which they do it is different. The main difference is their solubility. Dyes can dissolve in liquids on their own, while pigments can dissolve in liquids with the help of a binder. Dyes are mainly used in the textile and paper industries, while pigments are used in coloring paints, inks, cosmetics, and plastics.

As a professional supplier of high-efficiency dyes, Alfa Chemistry has the ability to provide customers with a comprehensive range of pigments, including:

Organic Pigments

Blue Pigments Red Pigments Yellow Pigments Green Pigments

Orange Pigments Violet Pigments Brown Pigments

Inorganic Pigments

Chrome Series Carbon Black Milori Blue Others

Iron Oxide Series Titanium Dioxide Ultramarine Blue

Types of Pigments

According to the method of their formulation, pigments can be divided into two categories, inorganic pigments and organic pigments. Both types of pigments are insoluble in resins and therefore require high shear for proper dispersion in resins.

• Organic Pigments

Organic pigments are based on carbon chains and rings. Functional groups in organic pigment that absorb visible light is called chromophores such as -N≡N-, -C=C-, -C=O, -C=S, -C=NH, -N=O, -NO₂. Although some pigments contain inorganic elements as stabilizers, organic pigments are mainly defined by this factor. These strong carbon chains also make them highly stable. Organic pigments are characterized by small particle size with large surface area and are usually translucent and more difficult to disperse than inorganic pigments.

• Inorganic Pigments

Inorganic pigments are usually characterized by large particle size with small surface area. Inorganic pigments are usually less costly than organic pigments, easier to disperse, and provide better opacity. They usually have good chemical resistance, do not cause warping, and do not bleed or migrate from most polymers. Most inorganic pigments are densely mined products.

Pigment Dispersion

Alfa Chemistry is committed to becoming a first-class, low-carbon, environmentally friendly dye supplier. Our mission is to provide customers with full specifications of high-quality dyes. We are also constantly expanding our product database to meet the wide range of customer needs. You are welcomed to contact us for more pigments.

It is important to note that our products are for research use only and are not for clinical use.