METHOD FOR DYEING LENS AND COLOR MATCHING METHOD FOR LENS

摘要

PURPOSE:To shorten the time of delivery by converting the information on colors to numerical values and communicating the numerical values with a dyeing factory from a spectacle store, etc., in place of supplying an actual article as a color sample and to obtain an efficient dyeing-recipe by making color mixing calculation by using the specific intensity characteristics of a dye bath to lenses and by converting the kinds and densities of the determined colors to dyeing time and dye compounding ratios, thereby allowing multifunction processing and stabilizing and improving productivity and color quality. CONSTITUTION:The color mixing calculation is made by using the specific intensity characteristics of the dye bath to the lenses to match or approximate the colors with or to target colors. The ratios calculated at this time are the dyeing densities of the respective colors. The relations of the dyeing densities with the dyeing time and temp. and the relations of decoloring speeds with the temp. and time when dyeing is executed in continuation with the different dye baths are investigated and the optimum dyeing recipe (dye bath, dyeing time and temp., dye compounding) is determined. The information on the color sample is converted to numerical values. These value are communicated with the dyeing factory online or by other means. The factory determines the dyeing recipe by the above-mentioned method and executes dyeing.