Dye of specific color made by diluting base solutions and combining these in proportion to give a final solution, colors of diluted and final solutions each checked and corrected if necessary

摘要

A concentrated dye solution is made up to a specified color by diluting base solutions to form secondary solutions, checking the color of these solutions and correcting their dilution if necessary. The secondary solutions are combined in controlled proportions to form a final solution of the specified color. The color of the final solution is checked and the proportions of the secondary solutions corrected if necessary An Independent claim is included for an apparatus having primary tanks for the base solutions connected to secondary tanks for the secondary solutions and dosing pumps connecting them to a mixing tank for making up the final solution. Control valves admit dilution water to the secondary tanks. The secondary and mixing tanks have chambers for checking the color of a sample. A unit controls the valves and dosing pumps. Preferred Features: The base solutions may correspond to the three primary colors. The primary, secondary and mixing tanks all have agitators. The final solution is transferred to a storage tank. A spectro-colorimeter is used to check to color. The control unit is a microcomputer.