Patent ID: 8542360
Filing Date: 2013-09-24
Classification: A61C,G01J

Abstract:
1. A method for producing color elements of a new shade guide comprising the following method steps: a) ascertaining color values of lightness values, hues, and chroma of a plurality of known color elements of two or more existing shade guides with similar lightness values, hues, and chroma via a spectrometer; b) grouping the known color elements from the two or more existing shade guides into groups with different lightness, within which the difference “delta E” between the lightness of each known color element and the average lightness of each lightness group is 0.5 to 2.5; and b) determining a plurality of new color values for new color elements for a new shade guide while increasing a color distance between the lightness values and/or hues and/or chroma from the grouped color elements, the plurality of new color elements being within the “delta E” of the corresponding grouped color elements; wherein the plurality of new color elements of the new shade guide is less than the plurality of color elements of the two or more existing shade guides.