Other

Nippon Paint Compnay, Ltd.

Ubiquitous Environment Company

Takao Asaba

Koichi Kuwano

Masayuki Osumi

Shuhei Numata

Yoshihiro Nonogaki

A method for generating a calculation formula to obtain an accurate mottling value is disclosed. Two-dimensional data and color values of a target paint film are considered. The calculation formula provides a method for numerically expressing the mottling of the target paint film.

Method for generating a formula for calculating mottling of a paint film, and a quantification method of the mottling

This invention provides a color matching apparatus for automotive repair paints with which the color matching of a repair paint to an existing paint, whether containing or not containing a metallic or pearlescent pigment, can be performed with high precision in a reduced number of steps even by the novice. The apparatus of the invention comprises a computer, a color data file and a database reference system.

Color matching apparatus for automotive repair paints

A method of determining the formulating ratio of metallic or pearlescent pigments to colorants for matching the color of a metallic or pearlescent coating to an target color wherein, the spectral reflectances of a plurality of samples varied in the formulation of colorants and metallic or pearlescent pigments are measured with a goniospectrophotometer and stored in a computer memory beforehand and, in performing a CCM using the stored data, reproduction spectral reflectances are calculated by reflecting the changes in spectral reflectance due to changes in the amount of the metallic or pearlescent pigments.

METHOD OF DETERMINING THE FORMULATING RATIO OF A METALLIC OR PEARLESCENT PIGMENT TO A COLORANT OR THE FORMULATING AMOUNT OF A METALLIC OR PEARLESCENT PIGMENT IN THE COMPUTER-AIDED COLOR MATCHING OF A METALLIC OR PEARLESCENT PAINT

The present invention is a method of measuring a gonio-spectral reflectance factor to establish a gonio-spectral reflectance factor database available for a personal computer by which a highly-fine realistic 3D computer graphics image can be formed. The method enables colorimetry in a reduced hours in fewer viewing directions compared to the conventional method by executing colorimetry in a plurality of viewing directions selected at random from all the directions that can be viewed by a goniospectrophotometer, said plurality of viewing directions being less than all the directions that can be viewed by the goniospectrophotometer.

Growing community of inventors

Tokyo, Japan

Takao Asaba