| 摘要 |
PROBLEM TO BE SOLVED: To treat a coloring material accurately to have same color as a specified color sample even in the case of a multiplayer working die having a translucent uppermost layer by specifying the spectral reflectance of the color sample and an intermediate coating layer and the thickness of an upper coating layer and calculating the density of each coloring material in the upper coating layer according to a specified formula. SOLUTION: A K/S ratio between an absorption coefficient K calculated from the spectral reflectance R∞of a color sample and a scattering coefficient S is substituted to formula I along with the absorption coefficient Ki and scattering coefficient Si of each coloring material (i) constituting an upper coating layer 3 in order to calculate rough density Ci of each coloring material. Absotption coefficient Kj and scattering coefficient Sj of each coloring material (j) constituting an intermediate coating layer 2 determined from the spectral reflectance R∞thereof are than substituted, along with the thickness Xa of the upper coating layer 3, the absorption coefficient Ki and scattering coefficient Si thereof and the K/S ratio of color sample, to formula (K/S)Xa=Ki+αijXa. Kj/Sj+αijXa. Sj in order to calculate a color transparencyαijXa. Subsequently, the color transparencyαijXa, the absorption coefficients Ki, Kj and scattering coefficients Si, Sj, and the K/S ratio of color sample are substitute to formula II in order to calculate the density Ci of each coloring matter in the upper coating layer 3.
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