EP0128442A2
Expired / Lapsed
EP
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Color comparison reference standard and method for using same
Assignee: Bayer Corp
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Filing: 1984-05-28
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Granted: —
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Expires: 2004-05-28
Abstract
Abstract An improved method for visually comparing the results of colorimetric analytical tests to a color reference standard, enabling substantially improved quantitation to be achieved for such tests, is disclosed. Also disclosed is an improved apparatus, in the form of an improved color comparison reference standard, which is useful in the method. In one embodiment, the standard can comprise a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric analytical test can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which the colored reference areas are displayed. The background area has a luminance (L<sup>*</sup>) value of from about 15 to about 80, and the luminance (L<sup>*</sup>) value of any portion of the background area is within about 30 of the average luminance (L<sup>*</sup>) value of any two or more adjacent ones of the colored reference areas which are displayed against the portion of the background area.
Inventors
- 👤 Robert Bauer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 07:21
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/52
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
127 words
A color comparison reference standard comprising a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric test means can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which said colored reference areas are displayed, said background area having a luminance (L * ) value of from about 15 to about 80, the luminance (L * ) value of any portion of said background area being within about 30 of the average luminance (L * ) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 2
Dependent Claim
127 words
A color comparison reference standard comprising a plurality of colored reference areas of differing hues corresponding to discrete reference values and to which a colored response area of a colorimetric test means can be compared to determine the reference value most closely related to the hue of the colored response area, and a background area against which said colored reference areas are displayed, said background area having a luminance (L * ) value of from about 15 to about 80, the luminance (L * ) value of any portion of said background area being within about 30 of the average luminance (L * ) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 3
Dependent Claim
57 words
The color comparison reference standard of claim 1, wherein the luminance (L * ) * value of any portion of said background area is with about 20 of the average luminance (L * ) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 4
Dependent Claim
56 words
The color comparison reference standard of claim 1, wherein the luminance (L * ) value of any portion of said background area is with about 10 of the average luminance (L * ) value of any two or more adjacent ones of said colored reference areas which are displayed against said portion of said background area.
Claim 5
Dependent Claim
74 words
4 . Color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L * ) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L * ) value within about 30 of the average luminance (L * ) value of any two adjacent ones of said colored areas.
Claim 6
Dependent Claim
74 words
4 . Color matching apparatus comprising a substrate, a colored background area upon said substrate having a luminance (L * ) value of from about 15 to about 80, and a plurality of colored areas of differing hues displayed against said background area, said background area further having a luminance (L * ) value within about 30 of the average luminance (L * ) value of any two adjacent ones of said colored areas.
Claim 7
Dependent Claim
54 words
A method for matching colors comprising the steps of displaying a color to be matched adjacent one or more of the colored areas of the apparatus defined in claim 6 and comparing against said background area of such apparatus the hue of said color and the hues of the colored areas of said apparatus.
Claim 8
Dependent Claim
81 words
In a color comparison chart comprising a plurality of colored reference standards for comparing a color response produced by an colorimetric analytical test thereto, the improvement wherein said chart further comprises a background against which said colored reference standards are displayed, said background having a luminance (L * ) value of from about 15 to about 80 and within about 30 luminance (L * ) units of the average luminance (L * ) value of any two adjacent colored reference standards.
Claim 9
Dependent Claim
81 words
In a color comparison chart comprising a plurality of colored reference standards for comparing a color response produced by an colorimetric analytical test thereto, the improvement wherein said chart further comprises a background against which said colored reference standards are displayed, said background having a luminance (L * ) value of from about 15 to about 80 and within about 30 luminance (L * ) units of the average luminance (L * ) value of any two adjacent colored reference standards.
Claim 10
Dependent Claim
64 words
The improved color comparison chart of claim wherein said background of said chart further comprises a color gradient varying from one portion to another thereof such that each of said portions of said background has a luminance (L * ) value within about 20 luminance (L * ) units of the average luminance (L * ) value of any two adjacent colored reference standards.
Claim 11
Dependent Claim
65 words
The improved color comparison chart of claim 6, wherein said background of said chart further comprises a color gradient varying from one portion to another thereof such that each of said portions of said background has a luminance (L * ) value within about 10 luminance (.L * ) units of the average luminance (L * ) value of any two adjacent colored reference standards.
Claim 12
Independent Claim
82 words
A method for distinguishing differences in hues of a plurality of colors, which method comprises displaying said colors against a colored background having a luminance (L * ) value of from about 15 to 80 and within about 30 luminance (L * ) units of the average luminance (L * ) value of any two or more adjacent ones of said colors, viewing said adjacent colors displayed against said background and determining the extent of visually perceptible hue differences between said colors.
Claim 13
Independent Claim
82 words
A method for distinguishing differences in hues of a plurality of colors, which method comprises displaying said colors against a colored background having a luminance (L * ) value of from about 15 to 80 and within about 30 luminance (L * ) units of the average luminance (L * ) value of any two or more adjacent ones of said colors, viewing said adjacent colors displayed against said background and determining the extent of visually perceptible hue differences between said colors.
Claim 14
Dependent Claim
42 words
1 0 . The method of claim 7, further comprising the steps of displaying a third color proximate to said adjacent ones of said colors and determining the extent of visually perceptible hue differences between said third color and said adjacent colors.
References Cited (Backward Citations)
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