JPH01284569A - Color matching - Google Patents

Abstract

PURPOSE:To make it possible to prepare a desired coating solution quickly by performing color matching by utilizing the relationship that the difference in the measured value of the color between a coating solution and a color matching plate made therefrom agrees with high precision with that between another coating solution and a color matching plate prepared therefrom in similar coating solutions. CONSTITUTION:This color matching is performed by the following procedures: (1) a color pattern P0 is determined, (2) the color of the first coating solution W1 is measured, (3) the color of the first color matching plate P1 made from the first coating solution W1 is measured, (4) the difference d in the color between the first coating solution W1 and the first color matching plate P1 is determined, (5) the color of the second coating solution W2 is measured, (6) the color of the second color matching plate P2 made from the second coating solution W2 is calculated from the difference d and the measured color of the second coating solution W2, (7) the difference betabetween the calculated color of the second color matching plate P2 and the color of the color pattern P0 is determined. The second coating solution W2 is controlled according to the difference beta to prepare the third coating solution W3. When a coating solution closer to the color pattern P0 is desired, the above procedures 5-8 are repeated about the third coating solution W3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a color toning method, and more particularly to a color toning method for quickly adjusting a coating liquid that can be painted in a color close to a color sample.

BACKGROUND ART Conventionally, a method generally referred to as computer color toning has been known as a method for adjusting a coating liquid that can be applied in a color close to a color sample.

This computer color matching is performed as follows.

First, a color sample is determined, and a coating liquid that can be painted in a color similar to the color sample is produced using a conventional method using a primary color coating liquid.
The coating liquid is applied to a predetermined board and dried and hardened to create a color matching board.

Next, measure the difference in color between this color toning board and the color sample,
Based on this difference, the amount of correction of the primary color coating liquid is calculated to generate a new coating liquid. Then, the generated coating liquid is applied to a predetermined plate and dried and hardened to create a second color toning plate.

The difference in color between this second color toning board and the color sample is measured, and based on this difference, the correction amount of the primary color coating liquid is calculated again.
A third coating liquid is generated. Then, the generated coating liquid is applied to a predetermined plate and dried and hardened to create a third color toning plate.

By repeating these operations one after another, a coating liquid that can be applied in a color extremely similar to the color sample is prepared.

Problems with the Prior Art In conventional computer color toning, a color toning board is created each time the coating liquid is adjusted and compared with a color sample.

Color toning plates are created by applying a coating liquid to a predetermined board and drying and curing it, so it takes a considerable amount of time to create a single color toning plate. It is necessary to create multiple items in sequence.

For this reason, conventional computer color mixing requires a considerable amount of time to adjust the desired coating liquid.

Means for Solving the Problems According to the present invention, in order to solve the problems as described above, there are the following steps: determining a color sample PO; measuring the color of the first coating liquid W1; and measuring the color of the first coating liquid W1. Measuring the color of the first toning plate P1 created by the liquid W1; Difference d between the color of the first coating liquid Wl and the color of the first toning plate P1;
determining the color of the second coating liquid W2; a second toned color created from the second coating liquid W2 from the difference d and the measured color of the second coating liquid W2; calculating the color of the plate P2; determining a difference β between the calculated color of the second toning plate P2 and the color of the color sample PO; and applying a second coating liquid W2 based on the difference β. Provided is a color toning method characterized by including adjusting the amount of water to produce a third coating liquid W3.

Effect 3 = Generally, there is a difference between the color of a coating liquid and the color of a dry coated plate created by applying the coating liquid and drying and curing it.

This difference is caused by changes in the refractive index of the binder when the coating liquid dries and hardens, that is, during film formation, yellowing and other color changes in the binder during film formation, changes in the dispersion state of color formers such as pigments, and changes in volume. It is understood that this change is due to other factors.

As described above, since the difference between the color of the coating liquid and the color of the dry coated plate is due to various factors, it is difficult to predict and estimate the color of the dried coated plate from the color of the coating liquid with high accuracy.

However, through research by the present inventors, it has been found that if a similar coating liquid is used, for example, a coating liquid with the same primary color coating composition and a similar blending ratio, the measured color value of the first coating liquid W1 and its The difference d1 between the measured color value of the dry coating plate, that is, the adjustment plate P1, created using the first coating liquid W1, and the measured color value of the second coating liquid W2, and the difference d1 between the measured color value of the dry coating plate, that is, the adjustment plate P1, created using the second coating liquid W2. It has become clear that the difference d2 from the measured value of the color of the adjustment plate P2 matches with a fairly high accuracy, or that the difference d2 can be estimated from the difference dl and the like.

That is, under certain conditions, for example, it can be written as follows.

d, = P, -W.

d2 = P2-W2 dl 吋 d2 The present invention has been made based on this knowledge.

That is, according to the present invention, the color of the first coating liquid W1 is measured,
The color of the first toning plate PI created by the first coating liquid W1 is measured, and the difference d between the color of the first coating liquid Wl and the color of the first toning plate P1 is determined.

Usually, a first coating liquid W1 is generated, and thereby a first coating liquid W1 is generated.
A color toning plate Pi is created and the colors thereof are measured. Instead, the first color toning plate PI is created, and then the first coating liquid Wl is generated based on the formulation data of the coating liquid that develops the color of the first color toning plate PL, and the color can also be measured.

Furthermore, the color of the second coating liquid W2 is measured, and from the above difference d and the measured color of the second coating liquid W2, the color of the second toning plate P2 created from the second coating liquid W2 is determined. Calculate. this is,
This invention is based on the above-mentioned knowledge of the present inventor.

Then, the calculated color of the second color toning plate P2 and the color sample PQ
The color difference β is determined, and the second coating liquid W2 is adjusted based on the difference β to generate the third coating liquid W3. The data for adjusting the second coating liquid W2 and generating the third coating liquid W3 based on the difference β can be the same as the data used in conventional computer color toning. .

In other words, the data here refers to the data of each primary color paint, which allows estimation and calculation of the colorimetric values of a toned paint board obtained from a coating liquid created by mixing and adjusting each primary color paint, etc. This is basic data related to color development, such as, and is determined based on colorimetric value data of a coated plate obtained by applying a coating liquid and drying and curing it.

It is widely used today.

When performing computer color toning based on Kubelka-Munk's theory, the basic data mentioned above is a data group mainly consisting of the absorption coefficient (K) and scattering coefficient (S) of each primary color paint. , the method for creating it is described in the cited text, etc. On the other hand, apart from the colorimetric value of the toning coating plate, it is also possible to collect the S value, which is the same basic data for the colorimetric value of the coating liquid. Determined based on value data. Here, the former is
The latter is distinguished as the 1S value for dry systems, and the S value for wet systems. According to the present invention, it is sufficient to prepare only dry basic data as data used for computer color matching, as in the past.

In the present invention, the primary color coating liquid is not limited to liquid,
It also includes powder forms, as well as rough colored types (pigment pastes) and easily dispersible pigments.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the invention will now be described with reference to FIG. 1, which shows the location of each color in the appropriate color coordinates.

First concrete example First, a desired color, that is, a color sample PO is determined.

This is the finished color that has been painted, dried and cured.

Next, a first coating liquid Wl that develops a color close to this color sample PO is generated using a conventional method. Then, this first coating liquid W1 is applied to a predetermined plate and dried and hardened to create a first color toning plate P1.

The colors of the first coating liquid W1 and the first color toning plate P1 are measured.

The color of the coating liquid Wl can be measured by placing the coating liquid in a transparent cell and measuring from the side or bottom of the cell, by measuring from the top of the coating liquid, or by immersing the measuring head inside the coating liquid. and so on.

Further, when measuring the color of the coating liquid, in order to perform accurate measurements, it is preferable to measure the coating liquid while stirring it with various stirrers.

A rheometer (
For example, Nippon Rheology Instruments Co., Ltd.'s NRM series rheometer, etc.) are known.

In these rheometers, the flow characteristics are measured by rotating a conical rotor within the coating liquid and measuring the 1·Lux acting on the rotor.

The rotor of such a rheometer can be used as a stirrer. That is, by rotating the rotor of the rheometer within the coating liquid housed in the glass cell, the coating liquid can be stirred.

Furthermore, measuring the color of a coating liquid is not limited to measuring the color of the coating liquid stored in a container; it is also possible to measure the color of the coating liquid by applying the coating liquid to a specified board and checking its color before it is completely dry. can be measured and used as the color of the coating liquid.

Next, the measured color of the first color toning plate Pl and the first coating liquid W
Determine the measured color difference d of 1.

For example, if the above colors are displayed using the XYZ color system,
The color of the first coating liquid and the color of the first toning plate Pl are respectively X! L1, YWl, ZWl and Xp
+, Y r),,l.

Zl)I, and the difference d between these colors can be expressed as dx, dy, dz.

As the color difference d, a simple subtraction value as shown below can be used.

dx = Xw, Xp+dy
-Yw+ Ypl dz = ZWI Zl)1 Generally, sufficient accuracy can be obtained with such a value, but
Various approximations can be used to obtain higher accuracy.

For example, dx, dy and dz are as follows:
Xw.

The values shown may be as a function of X I) I, X w 1 and XI)+, etc.

dx = F (Xwl-Xp++Xw++Xp+
)dy = F (Yw, ”p++Y'++Y
p+)dz =F(Zw+ Zp++ZW+, Zl
)+) Measuring a first difference σ between the color sample PO and the measured color of the first color toning plate PL.

Based on this first difference α, the correction amount of the primary color coating liquid is determined using a conventional computer color toning method, and the primary color coating liquid of the determined correction amount is applied to the first coating liquid W1. In addition, the second
Coating liquid W2 is generated.

Next, the color of this second coating liquid W2 is measured. It is preferable that the color of the second coating liquid W2 is measured using the same method and under the same conditions as the color measurement of the first coating liquid Wl.

Then, based on the measured second coating liquid W2 and the above-mentioned difference d, a second color toning plate P created with this second coating liquid W2 is determined.
Calculate the color of 2.

Next, the calculated color of the second color toning plate P2 and the color sample PO
Determine the color difference β.

The second coating liquid is adjusted based on this difference β to generate a third coating liquid. The data for adjusting the second coating liquid W2 and generating the third coating liquid W3 based on the difference β can be the same as the data used in conventional computer color toning. .

If you want a coating liquid that is even closer to the color sample PO, measure the color of the third coating liquid W3, and select the third coating liquid based on the measured third coating liquid W3 and the above difference d. The color of the third toning plate P3 created in W3 is calculated, the calculated color of the third toning plate P3 is determined by the color difference γ of the color sample PO, and the color difference γ is determined based on this difference γ. The third coating liquid is adjusted to produce a fourth coating liquid.

By repeating such a procedure, it is possible to gradually approach the ideal coating liquid wO that produces a color that matches the color vision tree PO.

Also, at a certain stage in such a procedure, an adjustment plate may be created, the difference between the color of the coating liquid and the color of the adjustment plate may be newly determined, the difference may be updated, and the procedure as described above may be continued. You can also do it.

Second Specific Example In the first specific example, the coating liquid that determines the difference d, that is, the first coating liquid, is sequentially modified to generate second and third coating liquids.

However, for example, when adjusting the same paint color repeatedly, or when using an approximate color sample within the range where the difference d is applicable, the difference d obtained in the first adjustment work is used for the second and subsequent adjustments. Able to perform work. In this case, it is not necessary to create an adjustment plate in the second and subsequent adjustment operations.

In this case, the second and third coating liquids are generated separately from the first coating liquid.

The color toning method of the present invention is suitable for toning the color of coated articles, but can also be applied to toning of dyed products, colored plastic products, printed matter, etc.

EXPERIMENTAL EXAMPLES AND EXAMPLES Next, experimental examples and examples proving the effectiveness of the present invention will be explained.

Experimental example 1 The following primary color enamels were prepared using air-drying oil-based paints.

(A) Titanium white (B) Carbon black (C) Red red (D) Cyanine blue (E) Lemon yellow Measurement was performed using a Sigma 5Z80 colorimeter manufactured by Nippon Denden Corporation.

Value correction (calibration) using the included standard white board
1. Preparation for measurement was carried out.

A dark gray coating liquid PO was prepared by mixing the primary colors (A), (B), (C), and (D). Divide this PO into 6 parts, leave one as is, and divide the other 5 into primary colors (A) and (B).
), (C), and (D) were added to each color to prepare coating liquids PO to P5 of different colors.

A part of this coating liquid was made into a sheet with a thickness of 3 mm, an inner diameter of 60 mm, and a height of 3 mm.
0 mm cylindrical (Petri dish type) glass cell with more than half of the cell.
Fill the tank, set it in the opening of the colorimeter, let the coating liquid stand still, and take a measurement.The measured value is the tristimulus value (C light source) x
, y, and z were obtained (this is referred to as [W]). Next, these coating liquids were spray-coated onto a 20×IO cm tin plate and dried and cured to obtain a coated plate.

These coated plates were measured and the tristimulus values (
C light source) xXy, z were obtained (this is referred to as [D]).

These are shown in Table 1.

Table 1 Painted plate colorimetric value [D] Coating liquid colorimetric value [W] xy
z xyz PO2,902,913,463,193,193,6
3PI 2.73 2,74 3,28 3,0
4 3.03 3.49p2 3.01 3.05
3.57 3,33 3,37 3.76P3
2.66 2.62 3,16 2,99 2,93
3.37p4 3,12 3,20 3.52
3,38 3,49 3.7IP5 2,51
2,40 3,20 2,86 2.78 3.3
5PO coating liquid...The colorimetric value differences DX, DY, and DZ between the coated plates were DX=0.29, DY=0.28, DZ=O, ] 7 (this is referred to as the difference [△]) . Based on these,
Other Pi-P5 coated plate colorimetric values were determined by calculation using the following equation (1), and the differences between the measured values and the measured values were compared. The results are shown in Table 2.

... (1) Formula [Wol ... Coating liquid color measurement value table 2 of reference coating liquid PO for determining difference [△] Calculated value - Actual value DX DY DZ P 1 0.01 0.00 0 .03p 2
0.04 0.05 0.03P 3
0.02 0.00 0.03P4 -0
．． 01 0.03 0.02P 5 0.03
0.06 -0.03 As shown in Table 2, the value of (calculated value - actual measured value) is sufficiently small. This means that the color matching method according to the present invention can perform color matching with sufficient accuracy.

Experimental Example 2 In Experimental Example 1, just before color measurement of the coating liquid, the coating liquid in the glass cell was stirred for 5 minutes using a stirrer with a conical rotor as explained in the first example shown in Fig. 1. Then, measure after giving the coating liquid some shearing elasticity.

Table 3 Coating liquid color measurement value [W'] X Y Z P 0 3.21 3.18 3.66PI
3.06 3.03 3.51p 2
3,33 3.33 3.77P 3 3
,02 2.93 3.37P 4 3.41
3,44 3.74P 5 2.89 2,
77 3.40PO coating liquid... Colorimetric value difference between coated plates DXS
DY and DZ were DX=0.31, DY=0.27, and DZ=0.20, respectively. Based on these, estimated values of the painted plate colorimetric values of other Pi-P5 were calculated using equation (1), and the differences with the actual measured values were compared.

Calculated value - Actual value DX DY DZ P L 0-01 0.01 0.02p
2 0.02 0.02 0.01p 3
0.03 0.02 -0.01P4 -
0.00-0.01 0.02P 5 0.
04 0.06 -0.02 Furthermore, the calculated values and measured values of X, Y, and Z were recalculated into L*, A*, and B*, and the difference between them was evaluated by color difference. The results are shown in Table 5. The results of Experimental Example 1 are shown as ΔE [W], and the results of Experimental Example 2 are shown as ΔE [W″].

Table 5 Between PQ Between calculated value - m - Measured value △E △E [W] △E [W''] Pi
O,720,260,07 P2 0.82 0.30 0.11P
3 1.55 0.42 0.30P
4 2.29 0.68 '0.25
P 5 3.90 0.94 0.78
In this way, the results of Experimental Example 2 show that the color difference between the measured value and the calculated value is reduced compared to the results of Experimental Example 1, and the shearing elasticity is applied to the coating liquid until just before the coating liquid color measurement. It has been shown that setting the value in advance improves the accuracy of the simulation of the actual measured value of the calculated value.

Experimental Example 3 A light gray coating liquid P6 was prepared by mixing primary colors (A), (B), (C), and (E). Divide this P6 into 6 parts, leave one as is, and divide the other 5 into primary colors (A) and (B).
), (C), and (E), and add the 2W color.
The pH of the coating liquids P6 and P6 of mutually different colors was adjusted. A part of this coating liquid was measured under the same conditions as in Experimental Example 2, and tristimulus values (C light source) x, y, and z were obtained as measured values. next,
These coating liquids were spray-coated onto a 20XlOcm tin plate and dried and cured to obtain a coated plate. These coated plates were measured, and the measured values were tristimulus values (C light source) X, Y, and Z.
I got it. The results are shown in Table 6.

Table 6 Painted plate colorimetric value [D] Coating liquid colorimetric value [W]XYZ
XYZ P6 45.1045.7455.18 41.66
42.2849.62P7 44.1444.795
4.11 40.7241.4048.60P8 4
5.9846.7356.24 42.5143.21
50.66P9 44.0244.3354.01
40.6941.0348.57PIO46,3846
,1056,0242,8142,6950,52pH
43,7443,2953,6140,5039,78
48, 41P6 coating liquid... Colorimetric value difference between coated plates DX, DY
SDZ was DX--3,45 DY--3,46 DZ=-5,56, respectively.

In this way, the amount of reflected light from the coating fluid increases.X,Y.

When the Z value is large, the difference in measured values between the coating liquid and the coated plate increases due to loss of light amount due to repeated reflection within the glass of the cell. Generally, when the absolute value of the difference is large,
It is expected that the accuracy of the calculated colorimetric value of the coating plate calculated based on this difference will also decrease, so in order to reduce this difference, a rough multi-dimensional regression formula between the coating liquid and the color values on both sides of the coating plate, such as , a multi-order regression equation as shown in equation (2) below is determined, and using this regression equation, the coating liquid colorimetric value is brought closer to the coating plate colorimetric value, and this is converted into the corrected coating liquid colorimetric value [ D']. This is shown in Table 8.

D'=-0,0000164W'+0. OOl 84W
”-0,0503W2+1.557t-1,42(2)
Formula % Formula % [] The corrected coating liquid colorimetric value of P6...The difference in the coating plate colorimetric value decreased to DX=-0,23 DY=-0,15 DZ--0,33, respectively. Based on these, estimated values of other coated plate colorimetric values of P7 to pH were calculated using equation (1), and the differences with the actual measured values were compared. The results are shown in Table 9.

Table 9 Calculated value - Actual value DX DY DZ P 7 0.00 0.02 0.01P 8
0.02-0.01 0.04P 9
-0.01 0.05 0.06PIO-0,070,
080,17 P 11 0.13-0.21 0゜29 Furthermore,
The calculated values and measured values of X% Y, Z were recalculated into L*, A*, and B*, and the difference between them was evaluated by color difference. The results are shown in Table 1O.

Table 10 Between P6 Distance between calculated value - m - Actual value △E △E P7 0,63 0.06p8 0.7
0 0.10p9 1.38
0.18P I O2,650,43 P 11 3.73 1.15 As these results show, in the case of bright colors, the corrected coating fluid measurement value [D''] determined by the multi-dimensional regression equation should be used. As a result, the calculated values and the measured values could be matched with sufficient accuracy.

Experimental Example 4 Using an Eagle Eye spectrophotometer made by Macbeth (USA), position it 1.2 m from the measurement surface and at an inclination angle of 68 degrees, and use the standard white board included with the equipment to perform value correction. Preparations were made for measurement.

A yellow-green coating liquid P12 was prepared by mixing the primary colors (A), (B), (D), and (E). Divide this PI3 into 5 parts, 1
One is left as is, and the other four are selected from the primary colors (A), = 23- (B), (D), and (E) and added, and coating liquids P12 of mutually different colors are added. - Adjusted P16.

Fill a tank with an inner diameter of 100 cm and a depth of 150 cm with this coating liquid, position it so that the liquid level is the measurement surface where the value correction was performed earlier, stir it thoroughly with a stirrer, and then let the coating liquid stand still. The tristimulus value (
C light source) X, Y, and Z were obtained.

Next, these coating liquids were spray-coated onto a 20×IO cm tin plate and dried and cured to obtain a coated plate. These coated plates were measured using a Sigma 5Z80 colorimeter, and the tristimulus values (
C light source) x, y, z were obtained.

Table 11 Painted plate colorimetric value [D] Coating liquid colorimetric value [W] xyz
xyz PI3 20.1723.62 7.64 21.7
425.16 8.67P13 19.7623.1
8 7.35 21.3624.76 8.42P14
20.5823.92 8.05 22.1425
．． 45 9.02P15 18.9622.79 7
．． 21 20.5824.41 8.36P16 1
9.8524.06 7.25 21.6725.73
8.16P12 coating liquid: The difference in colorimetric values between coated plates was DX=1.57, DY=1.54, and DZ=1.03, respectively. Using these values, estimated values of the other painted plate colorimetric values of P13 to P16 were calculated using equation (1), and the differences with the actual measured values were compared.

Table 12 Calculated value - Actual value DX DY DZ P l 3 0.00 0.01 0.01 P l
4 0.02 0.01 -0.02P15
-0.04 0.03 0.08P l 6
0.25 0.16 -0.18 Furthermore, the x, y, z calculated values and actual measured values were recalculated into L*, A*, B*, and the difference between them was evaluated by color difference.

Table 13 Between PI3 Actual value---Calculated value △E
△E P 130.52 0.04P l 4
1.16 0.10P] 5 2.51
0.41P l 64.11
The results of 1.09 or higher indicate that the smaller the actual color difference between the coated plates with the basic formulation and the peripheral formulations, the smaller the actual color measurement value of the coated plate [D
] and the difference [△1, estimated colorimetric value obtained by calculation from coating liquid colorimetric value [W], etc. The color difference between [DlCALo] is generally small, and the simulation accuracy of the calculated value tends to be high, and it is generally In a range where the actual measured color difference is within 3°0, which is considered a so-called approximate color, the color difference between the actual measured value - m = estimated value is also within 0.5, indicating that good simulation accuracy is maintained.

This is a fine toning method using a computer, that is, "
The color difference between the sample color and the color toning plate is small, and the relationship between the two belongs to the so-called approximate color area, and the amount of blending correction is calculated based on the colorimetric data of both. This proves that the method proposed by the present invention is effective in the field of "methods for color work." The fact that the simulation accuracy is within △E0.5 means that △E(L
*, A*, B* system) can be brought within 0.5, and it is known that the majority of people judge the paint color pair of △EO15 to be the same color. From the facts,
This shows its effectiveness as a toning method.

Example 1 (a) A Sigma 5Z80 colorimeter was used, and the color value on the toning plate side with respect to the sample plate was △E of the L*a*b* system (under C light source).
It was determined that the color toning was completed when the value was within 0.3.

(b) The characteristics of the sample board were as follows (yellow color)
. Spectral reflectance was measured using Sigma 5Z80, and tristimulus values and L*a*b* values were calculated from this reflectance data (both using C light source).

X 49.84 L* 75.46'Y
49.01 a* 4.82z
16.41 b* 54.09(c)
Based on the spectral reflectance of the sample board, the paint of the primary color, and the S data (dry type), computer color toning calculations were performed to calculate 1.
The amount to be mixed was determined.

Primary colors A (Titanium white) 51.00 B (Carbon black) 0.50 C (Organic orange) 3.20 D (Organic yellow) 45.30 (d) This formulation was measured and mixed and the coating liquid was stored in a glass cell. The coating liquid was measured from below the glass cell using a Sigma 5Z80 while stirring with a stirrer as described in the first example.

The measurement conditions were the same as in Experimental Example 2.

X 46.47 Y 46.18 2 18.29 (e) A coated plate was prepared from this coating liquid, and tristimulus values (C light source) were obtained.

X 49.80 Y 49.35 2 17.07 (f) [Δ] = [W] - [D] was calculated.

△X -3,33 △y -3,17 △Z -1,22 (g) Color values on the sample board, colorimetric values of the prepared painted board, amount of primary colors mixed, (dry) computer tone of each primary color From the basic color data (K, 'S values), the additional corrected blending amount of the primary color necessary for changing the colorimetric value of the painted plate to the color value of the sample plate was calculated.

Current blend Additional blend primary colors A 51', OO B' 0.50 0', OIC3,
200,36 D 45,30 2.82 (h)
This additional formulation was calculated and mixed, and the coating liquid was measured in the same manner as in (d).

X 46.43 Y 45.77 Z 17.91 (i) The estimated value of the coated plate colorimetric value was obtained from the coating liquid colorimetric value by the following calculation. Furthermore, L*a*b* was calculated.

X= 46.43+3.33X 46.47/46.4
3=49.76 L*=75.43Y=45.7
7+3.17X 46.18/45.77= 48.7
6 a*-4,732=17.91-1.22X18
．． 29/17.91=16.66 b*-53,53
(j) △E between sample board is 0.57, (
Calculate the additional corrected blending amount in the same way as in g) I
child .

Current blend Additional blend primary colors A 51.00 B O,51 C3,560,28 D 48,12 0.71(k)(h
) Measure the coating liquid in the same manner as above.

X 46.48 Y 45.79 2 17.69 (0,) Estimate the following colorimetric values in the same way as (i).

X=46.48+3.33X46.47/46.48=
49.81. L*=75.44Y-45,79+
3.17X 46.18/45.79= 48.99
a*-4,812= 17.69-1.22X 18
．． 29/17.69= 16.43 b*-54,0
3(m) The ΔE between the sample board and the sample board was 0.06, and the color toning was completed.

(n) A coated plate was prepared from this coating liquid, and when the color was measured, the following values were obtained, and it was confirmed that the color had actually reached the passing line. Visual evaluation results were also good.

X= 49.83 L* 75.47Y-49
,03a* 4.75 2= 16.49 b* 53.95 vs. sample
△E=O,, 14 Example 2 (a) Colorimeter and color measurement conditions were the same as Example 1.
child.

(b) The characteristics of the sample board were as follows.

X 49.11 L* 75.61Y
49.26 a* 2.21Z
16.27 b* 54.66 (c) It was recognized that the color values on the sample board side were similar to those of the sample board in Example 1, so the same primary color combination as (C) in Example 1 was mixed. , the coating liquid was measured.

Measurement conditions are the same.

X 46.28 Y 46.11 Z 18.40 The difference in results from Example 1 is due to the difference in primary color lots.

(d) Using Δ in (f) of Example 1, the painted plate colorimetric value was estimated.

X=46.28+3.33X46.47/46.28=
49.62 L*-75, 63Y-46, ll+3.
17X46.18/46.11=49.28 a*=
3.52z= 18.40-1.22x 18.29
/18.40=17.19 b*=52.77(e
) The ΔE between the samples and the sample plate was 2.30, and the additional corrected blending amount was calculated in the same manner as in Example 1.

Current blend Additional blend primary color A 51,00 2.55B
O,500,02 G 3.20 D 45,30 4.18(f)
After additional blending, the coating liquid was measured.

X 45.81 Y 46.09 2 17.62 (g) The measured values of the coated plate were estimated.

X=45.81+3.33X46.47/45.81=
49.19 L*=75.62Y= 46.09+
3.17X 46.1.8/46.09= 49.27
a*-2,40Z= 17.611.22X 18
．． 29/17.62= 16.35 b*-54,5
0(h) The ΔE between the sample plate and the sample plate was 0.26, and the color toning was completed.

Effects of the Invention According to the present invention, in the adjustment work, only one color toning plate needs to be created as described above, so that a desired coating liquid can be quickly adjusted.

Furthermore, the data for generating the third coating liquid from the second coating liquid is
Since the data used in conventional computer color matching is used, there is no need to create new data.

[Brief explanation of the drawing]

FIG. 1 is a simplified diagram showing the respective color positions of each element of the invention in appropriate color coordinates. PO...Color sample WO...Ideal coating liquid PI that develops the color of the color sample...
・First toning plate Wl...First coating liquid P2...Second toning plate W2...Second coating liquid PO Fig. 1

Claims (1)

[Claims] 1. Determining a color sample P0; Measuring the color of the first coating liquid W1; Measuring the color of the first toning plate P1 created by the first coating liquid W1. Difference d between the color of the first coating liquid W1 and the color of the first toning plate P1
determining the color of the second coating liquid W2; a second toned color created from the second coating liquid W2 from the difference d and the measured color of the second coating liquid W2; calculating the color of the plate P2; determining a difference β between the calculated color of the second toning plate P2 and the color of the color sample P0; and applying a second coating liquid W2 based on the difference β. A color toning method comprising: adjusting the amount of water to generate a third coating liquid W3. 2. The second coating liquid W2 is generated from the first coating liquid W1 based on the difference α between the color of the color sample P0 and the color of the first toning plate P1. Toning method described in section.