“…In addition, 44% of studies used more than one methodology to evaluate the masking ability 7,10,12–14,26,33,35,38,40,46,47,49,54–56 . From the studies that used ΔE, 95% used the CIELAB color difference equation (ΔE* ab ) 3,4–14,26,30–54,56–62 and 14% used the CIEDE2000 color difference equation (ΔE 00 ) 11,26,50,54,56,59 . When the masking ability was evaluated using the translucency parameter (TP), 95% of the studies used conventional TP 7,8,11,12,14,26,33,35,38,40,46,47,49,56,62 and 11% used the translucency parameter based on the CIEDE2000 color difference equation (TP 00 ) 56–58 …”