At the end of storage, the final⊿E value, which represented the total color change, was 12.87 and 31.23, respectively for 25D1 and 35D and the ⊿E of the latter was significantly higher than that of the former (P < 0.05). The RSC value of 25D1 decreased from 75.81% to 67.31% after 210 days of storage, whereas, the RSC value of 35D was drastically decreased to 64.05% within 120 days of storage.