Table 2.
Comparative color stability among composite materials
| Composite material | ΔE (Coffee) | ΔE (Tea) | ΔE (Red wine) | ΔE (Cola) |
|---|---|---|---|---|
| Material A | 2.90 | 2.10 | 4.50 | 1.80 |
| Material B | 4.20 | 3.40 | 7.20 | 2.90 |
| Material C | 5.60 | 4.40 | 9.70 | 3.80 |
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