Influence of Different Beverages on the Color Stability of Nanocomposite Denture Base Materials

Table 4

NBS rating system for expressing the color system.

NBS units	Remarks on color difference
0.0–0.5	Trace change
0.5–1.5	Slight change
1.5–3	Noticeable change
3–6	Marked change
6–12	Extremely marked change
12 or more	Change to other colors