In addition to value, hue and chroma, there are many subtle secondary optical properties of natural human tooth, such as translucency, opacity, iridescence, surface gloss and fluorescence.
天然牙的视觉外观除了颜色的三要素色相、明度、饱和度以外，还有许多第二光学特征：半透性、浑浊度、晕色、表面光泽度、荧光性，其中以半透性最为重要。
OH Value (Solids) : 20; Good flexibility, high gloss, Deep drawing, Can coating, coil coating.
羟值(固体)：20；柔韧、光泽、耐深冲、卷材涂料、制罐涂料。
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