(A) The following grades and their corresponding standards are adopted by the Ohio department of agriculture for use by producers and processors of maple syrup. For the purpose of this rule %Tc means the percent light transmission measured with a spectrophotometer using matched square optical cells having a ten millimeter light path at a wavelength of five hundred sixty nanometers, with the color values expressed in percent of light transmission as compared to analytical reagent glycerol fixed at one hundred percent transmission.
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(B) Any commercial color determining kit that provides an analysis of clarity and color comparable to that obtained by a spectrophotometer may be used to determine the grade listed on a label; however, in any dispute over the accuracy of a grade claim, a spectrophotometer shall be used to determine grade.