Michigan sweet cherry color measurement and prototype color chip development
1995
Timm, E.J. | Guyer, D.E. | Brown, G.K. | Schulte, N.L.
Dark sweet cherry skin color is an important criteria used to judge harvest maturity. Color standards are currently used to visually assess the maturity of 'Bing' variety cherries grown on the West Coast and shipped to domestic and international fresh markets. Measurements of present color standards compared against cherries have shown these color standards do not match color development patterns for varieties grown in Michigan. Colorimeter measurements were made of the skin color of 'Sam', 'Hedelfingen', and 'Ulster' dark sweet cherries in Michigan during the 1991, 1992 and 1993 harvests. A set of eight color chips were developed in 1993 based upon the color data collected during the 1991, 1992, and 1993 harvest seasons. The color chips closely matched the actual color changes of the cherries. The color results may also be useful in the development of automatic color sorting technologies.
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