Coloring techniques for powder coatings

Update:15-11-2019
Summary:

Color is a kind of perspective nerve feeling that is st […]

Color is a kind of perspective nerve feeling that is stimulated by the radiant energy of a certain wavelength and intensity of the human eye. Although the colors vary widely, the basic colors are only three basic colors of red, yellow and blue, which are usually called three primary colors. The two primary colors are equalized to each other to form a secondary color (inter-color), and the secondary color and the primary color are mutually blended to form a complex color.

Pigments for powder coatings can usually be classified according to different methods such as production methods, composition, function, etc.:

According to the production method, the pigments can be classified into natural pigments and synthetic pigments, natural pigments such as ingots, etc., which are generally used in powder coatings, while titanium dioxide and iron oxide pigments are used in synthetic pigments. , phthalocyanine series, azo pigments, polycyclic pigments, etc.

First, the function distinction:

The functions in powder coatings can be divided into coloring pigments, body pigments (also known as fillers), rust-preventing pigments, conductive pigments, etc. For most functional powder coatings, the application of functional fillers is very important.

Second, the chemical composition structure distinction:

The pigments for powder coatings can be divided into inorganic and organic components according to their chemical composition. Titanium dioxide, zinc oxide, iron oxide series, molybdenum chromium series, aluminum pigments, metallic pigments, etc. in inorganic pigments, and phthalocyanine series in organic pigments. , azo series, polycyclic pigments, etc.

Third, the hue distinction:

Pigments used in powder coatings exhibit different hue depending on the chemical composition, crystal structure, surface state, particle size, process and equipment of the pigment. For example, carbon black is the most widely used pigment in powder coatings. When the diameter is reduced or the surface is increased, the blackness of the carbon black increases, the light absorbs more, and the reflection is less, making people feel darker. Some merchants may also encounter the problem of how black is not "black", that is, the hue problem!

The pigments used in powder coatings exhibit different hue due to the chemical composition, crystal structure, surface state, particle size, process and equipment of the pigment.

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