Metallic pigments application problems

A further important application of these pigments is in paints. The natural red iron oxides are also used in primers for steel structures and cars, for marine coatings and for anti-fouling paints. In the USA, the metallic browns are used for these purposes. The level of soluble salts in the latter pigments is low and this reduces corrosion problems. The metallic browns are also used in heat resistant enamels. 

Aerosol science plays a key role in many different fields including (a) atmospheric sciences and air pollution, (b) Industrial production of pigments, fillers, and specially metal powders, (c) fabrication of optical fibers, (d) industrial hygiene, and (e) contamination control in the microelectronics and pharmaceuticals industries. Aerosols present in such applications can usually he considered as desirable or undesirable, but the same basic concepts apply to both types. Specialist. in the various applied fields increasingly make use of similar theoretical concepts and experimental techniques in solving aerosol problems. These common approaches are the focus of this book. 

The "Centroid Color Charts" (see NBS Special Publication 440) have been usefully applied to the textile and other industries. Special standardized illumination and viewing conditions must be employed for accurate matching of samples to the Centroid Color Charts. For viewing clear colored solutions, special apparatus is required. It is obvious from the context and discussion that almost all of the commercial application has been limited to opaque surface pigments (textiles, plastics, powders, metallic surfaces, etc.) and almost none to clear solutions. There are special problems in comparative color designations for opaque and clear samples, such as the following ... 

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