An Experiment in Visual Scaling of Small Color Differences*

Abstract

Under the auspices of the ISCC Committee on Color Difference Problems, an experiment was carried out in the visual scaling of small color differences involving six color microspaces. The object‐color samples were visually evaluated by ranking, by subjective estimation, and by acceptability judgments. Visual scales were calculated by traditional procedures. Correlations were calculated between the visual scales and four color‐difference formulas (CIELAB, C1ELUV, FMC‐2, and FCM), and ellipsoids were optimized to the visual data. No fundamental differences were found between the results of the perceptibility judgments and the acceptability judgments. Higher correlations than reported for earlier comparable experiments were obtained between visual and calculated color differences.

Effect of citric acid on color stability and surface roughness of translucent monolithic zirconia with different staining techniques

“…While a change in the color of S-G and S+G staining techniques ranged from 0.73 to 1.06. The S+G group has the highest color change value in citric acid solution with the level of 1.06 ± 0.11 which could be detected by an eye of a trained person (41). The result corresponded with an in vitro study of Vichi et al using spectrophotometer with gray card to measure the color change of resin composite (42) which showed that the ∆E values between 1 -3.3 can be perceived by human eye, but clinically acceptable.…”

Color Matching between Resin Cements and Try-in Pastes in Glass Ceramics at Different Thicknesses

“…Studies that show no difference was seen between the try-in paste and matching cements in terms of color perception are similar to the findings of the current investigation. 33,34 Research [35][36][37] investigating the impact of ceramic thickness on the compatibility of the try-in paste and its corresponding resin cement has shown that the thickness of the ceramic material has a noticeable influence on this compatibility. However, the ΔE values between the try-in pastes and resin cements have been found to increase with decreasing ceramic thickness, suggesting a decline in compatibility.…”

Development of poly(methyl methacrylate)/poly(lactic acid) blend as sustainable biopolymer for dental applications (Running Title) PMMA/PLA blend as biopolymer for dental applications

“…The human eye could detect the difference in color when ∆E* is above 1.0. 41 However, Ruyter et al reported that ∆E* above 3.3 was unacceptable in dentistry 42 . In this study, color change of M0 group was the highest while all PMMA/PLA blend ratios showed no signi cant difference in color stability, compared to PMMA.…”