JPH07248259A - Color slip assembly having color slip couple for detecting color rendering property of light source - Google Patents

Abstract

PURPOSE:To provide a color slip assembly which enables the selecting of a location with a high color rendering property easily by incorporating a color slip couple for detecting color rendering property of a light source into a part of the color slip assembly. CONSTITUTION:In a color slip assembly 10 with a color slip couple for detecting color rendering property of a light source, the color slip couple 14 for detecting color rendering property is added to the following paper of a cover paper of a color slip assembly 12. The color slip couple 14 for detecting color rendering property has colored sheets 18a and 18b stuck on a base paper of the color slip assembly adjacent to each other. The use of the color slip assembly facilitates the determination of whether an environment is suitable for comparison and identification of a surface color, that is, whether lighting conditions are similar to those of standard light or not. In addition, the color slip couple 14 for detecting color rendering property will not be always irradiated with ultraviolet rays. It should be noted that the color slip couple 14 for detecting color rendering property is added near a side facing a bound part of the color slip assembly 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color chart, and more particularly to a color chart provided with a pair of color charts for detecting color rendering properties of a light source.

[0002]

2. Description of the Related Art Many kinds of color samples using color charts have been prepared for the purpose of accurately transmitting or recording the color of an object. This color sample is used at the visual level,
It is used for comparative identification with samples.

Examples of representative color charts include the JIS standard color chart, which is a national standard, the internationally popular Munsell (registered trademark) color chart, and the Japan Paint Manufacturers Association issued by industry groups. Standard color swatches, auto swatches for car repair painting, and color swatches of color materials issued by private paint and ink companies.

When the colors are compared and identified using the color charts, they must be performed under standard conditions so that anyone can visually recognize the same color. That is, the color of the object is
This is because the appearance changes by changing the light source that illuminates it. Therefore, it is necessary to evaluate the color rendering of this light source, and the conditions at that time are JIS Z 8723.
It is standardized by the "Comparison method of visual sensation of surface color". And in this standard, the comparison of the surface colors is based on the standard light D _65.
It is stipulated that the operation be performed under the common light source D ₆₅ whose relative spectral distribution approximates to (color temperature 6504K).

However, the common light source D ₆₅ is a special one, and there are very few places where this light source is always provided.
Rather, it is common to find conditions that approximate natural light.

Therefore, it is possible to easily judge whether or not the lighting conditions are close to the standard light D ₆₅ and have the color rendering properties and color temperatures suitable for color evaluation, and search for a place with good color rendering properties. As a means for matching the levels of color comparison between the side that supplies the color and the side that determines the color, the inventor of the present application discloses
A color-rendering pair for color rendering is proposed in "Card for detecting color rendering of light source" (utility model right, registration number 1937763) of Japanese Patent Laid-Open No.

This "light source color rendering detection card" is mainly composed of two colored sheets A and B which are adjacent to each other, and the colored sheets A and B use dyes different from each other. Under the lighting condition similar to the standard light D ₆₅ , the colors are visually perceived, and under the light source other than the standard light source, the coloring sheets A and B are toned so that a difference in color occurs.

[0008]

However, the color-rendering-rendering color chart pairs are not always arranged at various places. In addition, it is rare that a user always carries a color rendering detection color chart pair with a color chart. On the other hand, when the color comparison is performed by using the color chart, it is standardized by the above-mentioned JIS that it is performed under the standard light D ₆₅ . For this reason, there is a problem that the places for comparing and identifying colors in the color chart are limited.

The present invention has been made in view of the above problems, and an object of the present invention is to facilitate the use of a color rendering pair for detecting color rendering of a light source attached to a part of a color chart. It is to provide a color chart collection that allows selection of a location with good color rendering.

[0010]

In order to solve the above problems, a color chart collection including a color rendering detection color chart pair of a light source according to the present invention is characterized by the following configuration.

(1) A color chart pair for detecting color rendering properties is attached to the color chart collection.

(2) In the color chart collection including the color rendering detection color chart pair of the light source described in (1) above, the color rendering detection color chart pair is attached to the next page of the cover of the color chart collection. ing.

(3) In the color chart set including the color rendering detection color chart pair of the light source according to the above (2), the color rendering detection color chart pair is attached near the binding portion of the color chart collection. There is.

(4) In the color chart collection including the color rendering detection color chart pair of the light source according to the above (2), the color rendering detection color chart pair is located on the side facing the binding portion of the color chart collection. It is attached to the neighborhood.

(5) In the color chart collection including the color rendering detection color chart pair of the light source described in (1) above, the color rendering detection color chart pair is attached to the back surface of the back cover of the color chart collection. ing.

(6) In the color chart collection including the color rendering detection color chart pair of the light source described in (5) above, the color rendering detection color chart pair is attached near the binding portion of the color chart collection. There is.

(7) In the color chart collection including the color rendering detection color chart pair of the light source described in (5) above, the color rendering detection color chart pair is located on a side facing a binding portion of the color chart collection. It is attached to the neighborhood.

(8) In the color chart collection including the color rendering detection color chart pair of the light source described in (1), the color rendering detection color chart pair is attached to the surface of the cover of the color chart collection. Further, the color rendering detection color chart pair is provided with a cover so as to cover the surface of the color rendering detection color chart pair.

(9) In a single color chart, the color rendering detection color chart pair is attached to the surface of the color chart, and
The color rendering detection color chart pair is provided with a cover so as to cover the surface of the color rendering detection color chart pair.

(10) In the color chart collection including the color rendering detection color chart pair of the light source described in (1) above, two color rendering sheets are arranged side by side in one of the color rendering detection color chart pairs. The coloring sheet is colored with the achromatic pigment formulation A below, the other coloring sheet is colored with the achromatic pigment formulation B below, and both coloring sheets are _under illumination conditions close to standard light D _65. In the same color, the colors are adjusted to produce a color difference between the colored sheets under a light source other than the standard light source. Pigment formulation A: Titanium yellow pigment: 36.5 to 52.0 parts Cobalt blue pigment: 20.0 to 35.5 parts, Titanium white (rutile type): 20.0 to 35.5 parts, Quinacridone red pigment: 0.5 to 2.5 parts, Pigment formulation B: Titanium white. (Anatase type): 47.0 to 61.5
Parts, rhodamine red pigment: 30.5 to 48.5 parts, copper phthalocyanine blue pigment: 1.0 to 3.5 parts, isoindolinone yellow pigment: 1.0 to 3.5 parts.

(11) In the color chart collection including the color rendering detection color chart pair of the light source described in (1) above, two color rendering sheet are arranged side by side in the color rendering detection color chart pair. The colored sheet is colored with the achromatic pigment formulation C below, the other colored sheet is colored with the achromatic pigment formulation D below, and both colored sheets are _under illumination conditions close to the standard light D _65. The color provided with the color-rendering index pair for detecting the color rendering of the light source is characterized in that they are perceived to be the same color, and the colors are adjusted to produce a color difference between the colored sheets under a light source other than the standard light source. Collection of votes, Pigment formulation C: Titanium white (rutile type): 55.0 to 65.0 parts, Polyazo yellow pigment: 17.5 to 23.0 parts, Copper phthalocyanine blue pigment: 7.0 to 12.0 Parts, carbon black: 7.0-12.0 parts, pigment combination D: titanium white (anatase type): 50.0 to 62.0
Parts, carbon black: 10.5 to 18.0 parts, cyanine green pigment: 10.5 to 18.0 parts, irgazine yellow pigment: 9.0 to 17.0 parts.

[0022]

In the color chart including the color rendering detection color chart pair of the light source of the present invention configured as described above, the color rendering detection color chart pair is attached to the color chart collection. Using, it is possible to easily understand whether or not the environment is suitable for comparatively identifying the surface color, that is, whether or not the illumination condition is close to the standard light D ₆₅ . Therefore, not limited to the location relative spectral distribution of standard illuminant D ₆₅ is standing a common light source D ₆₅ to approximate, it is possible to perform color evaluation by comparison of surface color.

By attaching the color rendering pair for color rendering detection to the next page on the front side of the color chart or the back side of the back cover, the color rendering pair for color rendering detection can be constantly irradiated with ultraviolet rays. Absent. For this reason, the members constituting the colored sheet of the color rendering pair for color rendering detection, for example, the pigment are not denatured, and the color tone is not deteriorated.

Further, since the color rendering pair for detecting color rendering is attached in the vicinity of the binding portion, the chance of being exposed to ultraviolet rays is further reduced.

Further, since the color rendering property detecting color chart pair is attached to the vicinity of the side facing the binding portion of the color patch collection, it is easy to handle the color rendering property detecting color chart pair in the vicinity.

Further, the color rendering detection color chart pair is attached to the surface of the cover of the color chart collection, and the color rendering detection color chart pair covers the surface of the color rendering detection color chart pair. Since the cover is provided in the first embodiment, first, the pigment of the coloring sheet of the color-rendering-rendering color chart pair is prevented from being denatured by ultraviolet rays to deteriorate the color tone. Further, since the color chart pair for detecting color rendering is provided on the cover of the color chart, it is easy to use when determining the color rendering.

Furthermore, the color rendering pair for color rendering is composed of two colored sheets juxtaposed with each other, and both colored sheets are perceived to be the same color under an illumination condition similar to the standard light D65, and the standard light source is used. Since the toning is performed under a light source other than the above so that a difference in color between the two coloring sheets occurs, comparing the hues of the coloring sheets juxtaposed with each other, the current environment is an illumination condition close to the standard light source D ₆₅ , In addition, it is possible to easily determine whether or not the environment has a color rendering property suitable for surface color comparison.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

First Embodiment FIG. 1 is a perspective view showing the structure of a color chart collection including a color chart pair for detecting color rendering of a light source according to the first embodiment of the present invention.

In the color chart collection 10 including the color rendering detection color chart pairs of the light source of the first embodiment, the color rendering detection color chart pair 14 is attached to the next page of the cover of the color chart collection 12. Here, "attaching" is meant to include holding, attaching, pasting, adhering, mounting, printing, and spray coating. Then, this color rendering detection color chart pair 14
The colored sheets 18a and 18b described below are attached to the mount 16 of the color chart so as to be adjacent to each other. This allows
By using the color chart 12, it is possible to easily understand whether or not the environment is suitable for comparatively identifying the surface color, that is, whether the lighting condition is close to the standard light D ₆₅ . Moreover, the color rendering property color chart pair 14 is not always irradiated with ultraviolet rays.
Therefore, the coloring sheet 18 of the color rendering pair 14 for color rendering detection
The members constituting a and 18b, for example, pigments are not denatured and the color tone is not deteriorated.

The color rendering pair 14 for color rendering may be attached in the vicinity of the side facing the binding portion of the color chart 12 as shown in FIG. It may be attached in the vicinity. When the color patch 12 is attached near the side opposite to the binding portion, the color rendering can be detected without opening the color chart collection 12 greatly, which is easy to handle. On the other hand, when the color rendering detection color chart pair 14 is attached in the vicinity of the binding portion, the chance of being exposed to ultraviolet rays is further reduced.

Second Embodiment FIG. 2 is a perspective view for explaining the structure of a color chart set including a color rendering detection color chart pair of a light source according to the second embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the color chart collection 20 including the color rendering detection color chart pairs of the light source of the second embodiment, the color rendering detection color chart pair 14 is attached to the back surface of the back cover of the color chart collection 12, that is, the final page. Has been done. As a result, the color rendering detection color chart pair 14 is not constantly irradiated with ultraviolet rays. Therefore, the members forming the colored sheets 18a and 18b of the color rendering detection color chart pair 14,
For example, the pigment is not modified and the color tone is not deteriorated.

The color rendering pair 14 for color rendering may be attached in the vicinity of the side facing the binding portion of the color chart 12 as shown in FIG. It may be attached in the vicinity.

Third Embodiment FIG. 3 is a perspective view for explaining the structure of a color chart collection provided with a color chart pair for detecting color rendering of a light source according to the third embodiment of the present invention. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the color chart collection 30 including the color rendering detection color chart pairs of the light source of the third embodiment, the color rendering detection color chart pair 14 is attached to the cover of the color chart collection 12. Further, the color rendering detection color chart pair 14 is provided with a cover 22 so as to cover the surface of the color rendering detection color chart pair 14. The cover 22 is preferably impermeable to ultraviolet rays and visible light. As a result, the pigments of the coloring sheets 18a and 18b do not deteriorate in color due to the substance being denatured by the ultraviolet rays.

Example 1 of color chart for detecting color rendering of light source FIG. 4 is a perspective view showing an example of a pair of color charts for detecting color rendering of a light source used in the present invention. Further, FIG. 5 is a sectional view taken along the line CC 'of FIG. FIG. 6 is a perspective view showing a state in which the color rendering pair for color rendering detection of the light source of the present invention is viewed with the standard light D ₆₅ light source, and FIG. 7 is the light source of the present invention in the illumination in which the color rendering of the light source is inappropriate. FIG. 3 is a perspective view showing a state in which the color rendering pair for color rendering detection is viewed.

As shown in FIG. 4, in the color-rendering detection color chart pair 14 of this embodiment, two coloring sheets 18a and 18b are arranged side by side, and one coloring sheet 18a has the following achromatic pigment mixture. A is colored from A, and the other colored sheet 18b is colored from the following achromatic pigment blend B. And
Both of the colored sheets 18a and 18b are perceived to be the same color under the condition of the standard light source 40 (standard light source D ₆₅ ) as shown in FIG. 6, and under the light source 50 other than the standard light source as shown in FIG. The colors are adjusted so that a difference in color between the colored sheets 18a and 18b occurs.

The colored sheets 18a and 18b are plastic sheets or colored papers colored with the pigment compositions A and B having the following compositions. Then, the coloring sheets 18a, 18
When b is a plastic sheet, the following pigment composition is kneaded into a plastic sheet such as polyvinyl chloride resin or polyethylene to form a film,
Alternatively, the above-mentioned plastic sheet coated with the following pigment composition is applied. When paper or the like is used as the coloring sheet, the following pigment mixture may be used and printed or coated uniformly on the paper as printing ink or paint. In addition, the coloring sheets 18a and 18b
Is preferably a thin sheet.

(1) Pigment formulation A used for the coloring sheet 18a: titanium yellow pigment: 44 parts, cobalt blue pigment: 28 parts, titanium white (rutile type): 27 parts, quinacridone red pigment: 1 part.

(2) Pigment formulation B used for the coloring sheet 18b: Titanium white (anatase type): 56 parts, Rhodamine red pigment: 40 parts, Copper phthalocyanine blue pigment: 2 parts, Isoindolinone yellow pigment: 2 parts.

The range of the blending amount of each pigment of the above-mentioned pigment blend A is preferably titanium yellow pigment 36.5 to 52.
0 parts, cobalt blue pigment 20.0 to 35.5 parts, titanium white (rutile type) 20.0 to 35.5 parts, and quinacridone red pigment 0.5 to 2.5 parts.

Further, the range of the blending amount of each pigment of the above pigment blend B is preferably 47.0 to 61.5 parts of titanium white (anatase type), Rhodamine red pigment 3
0.5 to 48.5 parts, copper phthalocyanine blue pigment 1.
0-3.5 parts, isoindolinone yellow pigment 1.0-
3.5 copies.

When the amount is out of the above range, the required property of perceiving the same color cannot be obtained. In addition, the structure of a pigment of a similar color can be changed depending on the selected pigment, and the above-described color characteristics with respect to light can be obtained.

Example 2 of color chart for detecting color rendering of light source In the color chart pair 14 for detecting color rendering of the above example 1, the pigment composition of the two coloring sheets 18a and 18b has the following composition. In this embodiment, the coloring sheets 18a and 18b are
Printed by silk screen. Further, the following pigment composition is a primary color ink for silk screen,
It is an ink in which each pigment is mixed.

(1) Pigment formulation C used for the coloring sheet 18a: Titanium white (rutile type): 60 parts, Polyazo yellow pigment: 20 parts, Copper phthalocyanine blue pigment: 10 parts, Carbon black: 10 parts.

(2) Pigment formulation D used for the coloring sheet 18b: Titanium white (anatase type): 57 parts, carbon black: 15 parts, cyanine green pigment: 14.5 parts, irgazine yellow pigment: 13.5 parts .

The range of the blending amount of each pigment of the above pigment blend C is preferably titanium white (rutile type) 55.0.
~ 65.0 parts, polyazo yellow pigments 17.5-23.
0 parts, copper phthalocyanine blue pigment 7.0 to 12.0
Parts, carbon black 7.0 to 12.0 parts.

The range of the amount of each pigment of the above-mentioned pigment mixture D is preferably titanium white (anatase type) 50.0 to 62.0 parts and carbon black 10.5.
˜18.0 parts, cyanine green pigment 10.5 to 18.
0 parts, Irgadine yellow pigment 9.0-17.0 parts.

If the amount is out of the above range, the desired sensation of the same color cannot be obtained. In addition, the structure of a pigment of a similar color can be changed depending on the selected pigment, and the above-described characteristics with respect to light can be obtained.

The color-rendering-detection color chart pair 14 in which both are arranged side by side and subjected to silk screen printing is illuminated by standard light C (color temperature 6774K), which is a light source close to standard light D ₆₅ .
Alternatively, in the natural daylight of the north window, the color difference between the two is 0.07, which is extremely small, and they appear to be the same color with the naked eye. Under these conditions, the Munsell value of both is 0.14BG6.15.
/2.61. On the other hand, the color difference between the two under an incandescent lamp is 4.15, which is 60 times the previous value. In this case, the colored sheet 18b looks considerably greener than the colored sheet 18a with the naked eye. In addition, under a white fluorescent lamp, the color difference between the two is 2.52, and the colored sheet 18b appears to the naked eye to be a greenish color and a slightly brighter color than the colored sheet 18a.

The above "0.14BG" represents the hue
“6.15” indicates lightness, and “2.61” indicates saturation. The term "greenness" means that one is more strongly aware of green.

The color chart collection provided with the color chart pair for detecting the color rendering of the light source as described above is used in the following places and applications.

(1) A printing company or a design office that calibrates the color of printing (2) A site for color matching of plastics and paints (3) An inspection room for judging the degree of color matching such as painting and dyeing (4) Color materials (5) Clothing and interior products sales floor (6) Car body and interior parts color matching site (7) Car repair painting site (8) Dentist's color of denture Match

[0055]

As described above, the color chart collection provided with the color rendering pair for color rendering of the light source of the present invention is used for color evaluation by attaching the color rendering pair for color rendering detection to the color chart. It is possible to easily grasp the location of the suitable color rendering property, that is, whether or not the lighting condition is close to the standard light D ₆₅ . Therefore, not limited to the location relative spectral distribution of standard illuminant D ₆₅ is standing a common light source D ₆₅ to approximate, it is possible to perform color evaluation by comparison of surface color.

Further, by attaching the color-rendering-rendering color chart pair to the next page of the front surface of the color-rendering book or the back surface of the back cover, the color-rendering detection color chart pair is constantly irradiated with ultraviolet rays. Absent. For this reason, the members constituting the colored sheet of the color rendering pair for color rendering detection, for example, the pigment are not denatured, and the color tone is not deteriorated.

By attaching the color rendering pair for color rendering to the vicinity of the binding portion of the color chart collection, the chance of exposure to ultraviolet rays is further reduced.

Further, since the color rendering property detection color chart pair is attached to the vicinity of the side facing the binding portion of the color chip collection, it is easy to handle the color rendering property detection color chart pair in the vicinity.

Further, the color rendering detection color chart pair is attached to the surface of the cover of the color chart collection, and the color rendering detection color chart pair covers the surface of the color rendering detection color chart pair. Since the cover is installed on the color rendering sheet, the pigment of the color sheet for color rendering detection does not deteriorate the color tone due to the substance being denatured by ultraviolet rays.The color rendering can be detected on the cover of the color chart. Since it is provided on the pair of color charts, it is easy to use when determining the color rendering properties.

Furthermore, the color rendering pair for color rendering is composed of two colored sheets juxtaposed with each other, and both colored sheets are visually perceived to be the same color under an illumination condition close to the standard light source D _65. The colors are adjusted so that a color difference occurs between the colored sheets under a light source other than the standard light source.Comparing the hues of the colored sheets arranged side by side, the current environment is the standard light source and the surface color is compared. Therefore, it is possible to easily determine whether or not the environment has an appropriate color rendering property.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a configuration of a color chart collection including a color rendering detection color chart pair of a light source according to a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating a configuration of a color chart collection including a color rendering detection color chart pair of a light source according to a second embodiment of the present invention.

FIG. 3 is a perspective view illustrating the configuration of a color chart collection including a color rendering detection color chart pair of a light source according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing an example of a color rendering pair for color rendering detection used in the present invention.

5 is a cross-sectional view taken along the line CC ′ of FIG.

FIG. 6 is a perspective view showing a state where a color rendering detection color pair of the light source of the present invention is viewed with a standard light D ₆₅ light source.

FIG. 7 is a perspective view showing a state in which a pair of color charts for detecting color rendering of the light source of the present invention is viewed in an illumination in which the color rendering of the light source is inappropriate.

[Explanation of symbols]

10, 20, 30 Color chart with color chart pair for color rendering detection of light source 12 Color chart 14 Color chart for color rendering detection 16 Color chart mount 18a, 18b Coloring sheet 22 Cover

Claims (10)

[Claims] 1. A color chart including a color rendering detection color chart pair of a light source, wherein the color rendering detection color chart pair is attached to the color chart collection. 2. A color chart collection comprising a color chart pair for detecting color rendering of a light source according to claim 1, wherein the color chart pair for detecting color rendering is attached to the next page of the cover of the color chart. A color chart collection provided with a color chart pair for detecting the color rendering of a light source. 3. A color chart collection including a color rendering detection color chart pair of a light source according to claim 2, wherein the color rendering detection color chart pair is attached near a binding portion of the color chart collection. A color chart collection including a color chart pair for detecting the color rendering of a light source. 4. A color chart collection including the color rendering detection color chart pair of the light source according to claim 2, wherein the color rendering detection color chart pair is near a side facing a binding portion of the color chart collection. A color chart that includes a color chart pair for detecting the color rendering of a light source, which is attached. 5. The color chart collection including the color rendering detection color chart pair of the light source according to claim 1, wherein the color rendering detection color chart pair is attached to the back surface of the back cover of the color chart collection. A color chart collection provided with a color chart pair for detecting the color rendering of a light source. 6. The color chart collection including the color rendering detection color chart pair of the light source according to claim 5, wherein the color rendering detection color chart pair is attached near a binding portion of the color chart collection. A color chart collection including a color chart pair for detecting the color rendering of a light source. 7. The color chart collection including the color rendering detection color chart pair of the light source according to claim 5, wherein the color rendering detection color chart pair is near a side facing a binding portion of the color chart collection. A color chart that includes a color chart pair for detecting the color rendering of a light source, which is attached. 8. A color chart collection including a color rendering detection color chart pair of the light source according to claim 1, wherein the color rendering detection color chart pair is attached to a surface of a cover of the color chart collection, and The color-rendering-rendering color chart pair is provided with a cover so as to cover the surface of the color-rendering-rendering color chart pair. . 9. A color chart collection including a color-rendering color chart pair of a light source according to claim 1, wherein two color-rendering color chart pairs have two colored sheets juxtaposed to each other. Is colored with the achromatic pigment formulation A described below, the other colored sheet is colored with the achromatic pigment formulation B described below, and both colored sheets are standard light D
A color for color rendering detection of a light source characterized by being visually perceived to be the same color under an illumination condition similar to ₆₅ , and toning is performed under a light source other than the standard light source so that a color difference occurs between the colored sheets. Color chart with a pair of votes, Pigment formulation A: Titanium yellow pigment: 36.5 to 52.0 parts, Cobalt blue pigment: 20.0 to 35.5 parts, Titanium white (rutile type): 20.0 ~ 35.5 parts, Quinacridone red pigment: 0.5-2.5 parts, Pigment formulation B: Titanium white (anatase type): 47.0-61.5
Parts, rhodamine red pigment: 30.5 to 48.5 parts, copper phthalocyanine blue pigment: 1.0 to 3.5 parts, isoindolinone yellow pigment: 1.0 to 3.5 parts. 10. A color chart collection comprising a color chart pair for detecting color rendering of a light source according to claim 1, wherein the color chart pair for detecting color rendering has two colored sheets juxtaposed to each other. Is colored with the achromatic pigment formulation C below, the other colored sheet is colored with the achromatic pigment formulation D below, and both colored sheets are colored with the standard light D
A color for color rendering detection of a light source characterized by being visually perceived to be the same color under an illumination condition similar to ₆₅ , and toning is performed under a light source other than the standard light source so that a color difference occurs between the colored sheets. Color chart with a pair of votes, Pigment formulation C: Titanium white (rutile type): 55.0 to 65.0 parts, Polyazo yellow pigment: 17.5 to 23.0 parts, Copper phthalocyanine blue pigment: 7 0.0 to 12.0 parts, carbon black: 7.0 to 12.0 parts, pigment formulation D: titanium white (anatase type): 50.0 to 62.0
Parts, carbon black: 10.5 to 18.0 parts, cyanine green pigment: 10.5 to 18.0 parts, irgazine yellow pigment: 9.0 to 17.0 parts.