Table 2.
Delta E (ΔE) and difference in ΔE between grades
| Grade | ΔE | ΔE difference between grades |
|---|---|---|
| 1 | 2.09 | ‐ |
| 2 | 3.50 | 1.41 |
| 3 | 5.56 | 2.06 |
| 4 | 7.67 | 2.11 |
| 5 | 10.86 | 3.19 |
| 6 | 14.70 | 3.84 |
| 7 | 16.55 | 1.85 |
| 8 | 20.81 | 4.26 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.