In order to understand the color change characteristics, the study tested the color stability of the five Vita VMK68 stains. The international color standard CIE1976LAB color system and CS ?5 Spectrocolorimeter are used.

• 为了解着色剂颜色改变的一般规律及特点，我们采用CIE1976LAB色度系统对VitaVMK68的5种着色剂进行了色稳定性分析。