Importance

Loading Importance Indicators...

Abstract

A method for making a dye mixture to produce a target colour on a given substrate, comprising the steps of: -;a) measuring reflectance values RT(λi) of the target colour at a plurality of wavelengths λi=1, 2 . . . n; b) measuring reflectance values Rs (λi) of the substrate at the same wavelengths λi; forming a set of concentrations cj of M dyes in the calculated concentrations; the database having been compiled by aa) making dyeings of combinations of the dyes Dn at different concentrations; bb) measuring the reflectance values R of the dyeings at different wavelengths; cc) defining a function f(R); dd) defining a relationship between f(R) and c involving constants g and k; and ee) for each dye Dn determining constants gn, kn, such that the calculated values for f(R), c, gn kn approximate closely the measured values.

Loading the Abstract Image...

First Claim