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Index for determining quality of color

A technique of characteristic numbers, colors, applied in the field of computer programs of a method, capable of solving problems such as disregarding effect pigments

Active Publication Date: 2017-08-29
BASF COATINGS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are known methods in the prior art which provide a limited comparison of a specific paint to a specific original shade (i.e. a color reference) for only three measurement geometries, regardless of the presence of any effect pigments

Method used

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  • Index for determining quality of color
  • Index for determining quality of color
  • Index for determining quality of color

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0051] figure 1 Table 10 with three columns 13, 15 and 17 is shown. The first column 13 indicates the grade value of the characteristic number Q, which spans a rating scale of 1 to 8, where 1 represents the worst quality, i.e., the worst possible match of the corresponding paint to the corresponding color reference, and 8 represents the best quality, i.e. The best possible match of the corresponding paint to the corresponding color reference.

[0052] Column 15 indicates the rules for assigning the color difference calculated from the spectral measurement of the effect paint and the corresponding color reference to the individual class values ​​of the characteristic number Q in the form of an unambiguous concrete equation. In order to assign the corresponding mass of the effect paint to the corresponding color reference of the characteristic number Q, there are at least four and at most ten conditions that must be fulfilled, each defined by a specific equation. The term "equ...

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PUM

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Abstract

The invention relates to a method for determining an index for characterizing a quality of a matching color tone of a paint in relation to a color reference, characterized in that colorimetric coordinates of the paint and of the color reference are determined for a number of measuring geometries using a spectrophotometer, color differences are calculated from the colorimetric coordinates of the paint and of the color reference for each of the number of measuring geometries and are normalized, and a pre-established assignment rule is used for assigning a value on a scale to a group of characteristic values calculated from the normalized color differences in order to determine the index.

Description

technical field [0001] The invention relates to a method for determining a characteristic number characterizing the quality of a shade setting of a paint. The invention also relates to a computer program for implementing the method of the invention. Background technique [0002] In the mixing of paints, ie in the case of shade setting, different shades are mixed and then compared with a color reference or shade original. For this purpose, traditionally, the mixed paint is measured spectrophotometrically and the resulting measurements (ie, for example the colorimetric coordinates) are compared with corresponding measurements of a color reference. Especially in the case of effect paints comprising many effect pigments, a meaningful comparison between a specific effect paint and a specific color reference is possible using only measured values ​​determined under different measurement geometries. This means that in order to compare a paint to a color reference, multiple measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/50G01J3/10G01J3/46
CPCG01J3/10G01J3/463G01J3/50G01J3/504G01N21/251G01N21/276G01N21/278G01N21/293
Inventor C·维葛诺罗H·克洛彭博格
Owner BASF COATINGS GMBH