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The oil color is made by mixing pigments with plant oil such as poppy oil, and linseed oil. The pigments are encapsulated by the oil, and when exposed to air oxidizes and　becomes hard. Since this happens slowly, pictures painted with oil paints don't dry quickly. Unlike water color which dries after the water evaporates, oil paintings dry when the oil solidifies, therefore ,the thickness of oil paints remain after drying.
[Characteristics]
1. Stable paint film
Oil is turning into a high molecular polymer during the chemical change. Therefore the paint film becomes very stable.
2. Elegant colors
The transparency of color is high.
3. Excellent light resistance
It is exposure to ultraviolet rays that mainly causes paint changes and also color fading. Holbein's oil colors have passed the ultraviolet ray exposure test according to the standard of U.S. ASTM which is the most strict in the world at present. 4 classes of light resistant property is printed on each paint tube.
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