Pre-coated metals are known as PCM, pre-painted steel sheet or coil coating. They are widely used for home appliances such as refrigerators and washing machines, interior uses such as light fitting and partition, and construction uses such as roofing and siding. Coating films require high flexibility and coated primer for corrosion protection of edge or bent part after cutting and forming.
In this paper, several types of topcoat for pre-coated metal and recent trend of functional coating are explained. Development status of chromate free primer for construction use is also explained.

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Surface treatment technologies of pigments for cosmetics have been remarkably developed for about over 30 years. These technologies have prevented from the corruption of the make-up on the skin by applying the hydrophobicity and/or oil-phobisity, improving feeling and affinity on the skin and so on. In this paper especially surface treatment for water system will be discussed. We have developed cation and inion polymer treatment. The cation polymer treatment shows very good water dispersibility and the inion polymer treatment gives pH response property on the pigments in water. And also, we have developed the novel surface modified polyacrylic acid ester beads, on whose surface carboxylic groups are introduced. This makes water dispersable beads and also novel beads are able to adsorb the particles of inorganic metal oxides particles on the surface and dispersed in water.
Furthermore, we have developed the unique gemni-type compound treatment pigments. Using these treated pigments, we can make the oil-water emulsion without any surfactants, the ratio of water and oil is 60 to 40. Above these technologies are very unique for water system. We are expecting the novel water base cosmetics using these technologies.

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Many species of animals including jewel beetle and peacock have brilliant structural color. These colors are produced by optical phenomena caused by microstructure of submicron size. Various forms of the microstructures have been reported so far, ranging from a simple thin-layer to a three-dimensional periodic network. This article considers the multilayered thin-film structure that is most commonly found in structural color in nature. While the multilayer structure is applied in artificial thin-film optics, animals also utilize it to produce their brilliant colors.

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This article describes the functions of surfactants and surface tension as well as the definition of surfactants. In addition, the characteristics of anionic, cationic, nonionic and amphoteric surfactants are introduced on the basis of the classification of surfactants.

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