JP2004137488A - Toning method, coating method, toning apparatus and toning program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an efficient treatment relating to toning by mixing a plurality of primary color coating components to obtain a target coating and toning the coating by liquid colorimetry. <P>SOLUTION: A toning method for obtaining the target coating by mixing a plurality of the primary color coating components comprises a coating selection step (S41) for selecting the target coating; a formulation decision step (S48) for deciding a basic formulation of the target coating; a formulation step (S50) for formulating and mixing a plurality of the primary color components at a ratio of formulation as decided at the formulation decision step; a liquid colorimetry step (S51) for subjecting the coating as mixed in the formulation step to the liquid colorimetry; and a toning step (S53) for comparing the optical properties which identify the target coating with those measured in the liquid colorimetry step, and additionally mixing the primary color coating components to effect toning when the difference in both optical properties is greater than a specified value. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a toning method, a coating method, a toning device, and a toning program.

Fig. 1 shows the sequence of the toning process in the conventional coating.

First, a paint master and a painter decide a design master (S9). The design master is a paint color that is mutually confirmed between the paint manufacturer and the color painter and is agreed on the design, and the sample board 2 is usually produced.

Next, the primary color paints and the proportions of the primary color paints are determined based on the primary color paint composition data recorded when the design master was produced (S11). When the primary color paint and its mixing ratio are determined, the primary color paint necessary for the production of the paint is extracted from the primary color tank 1 based on the determined data and measured (S12), and the amount required for the production of the paint is obtained. To obtain the primary color paint. A required number of primary color paints are obtained and stirred to produce paints (S13). A coated plate is produced using the paint produced in step 13 (S14). The prepared coated plate and the sample plate 2 are compared, and if there is no color difference (S15: No), after filling the obtained paint, it is transferred to the painter's factory (S17), and the coating is performed using this. The coating is performed after dilution is performed on the coating line in the user's factory (S18).

By the way, the prepared painted plate and the sample plate 2 are compared in step 15, and if there is a color difference (S15: yes), a primary color paint is added (S16) to produce a paint (S13). Usually, in step 16, one or more primary color paints are added in order to eliminate the color difference. Next, a paint plate is prepared again using the paint produced in step 13 (S14), compared with the sample plate 2 (S15), and this step is repeated until there is no color difference between them. When the color difference between the two disappears, after filling the obtained paint, it is transferred to the painter's factory (S17), this paint is diluted, and the actual paint is performed on the paint line in the painter's factory ( S18).

In this way, using the paint produced at the paint manufacturer's factory, the paint is transferred to the painter's factory and painted on the painting line. May be done.

However, the conventional toning has the following problems.
(1) Since the confirmation of whether or not toning has been performed using a painted plate, usually, after diluting the paint, applying the paint, setting and baking and drying, and cooling the painted plate to room temperature, Needs a lot of time. As described above, the production of a coated plate is a serious task, both in terms of the length of time required and the amount of work.

Further, even if many coated plates are produced, they are discarded, and there is a problem that resources are wasted.
(2) The prepared painted plate and the sample plate are compared, and if there is a color difference, steps 13 to 16 are repeated until there is no color difference between the two. By the way, if a color difference occurs in step 15, a primary color paint is added in step 16, but this addition of the primary color paint requires special skills called craftsmanship and can be done by anyone. is not.
(3) Even if the same paint is used and the same paint is applied, if the paint is stored for a long period of time, the color may change over time. In such a case, it is necessary to repeat the toning.
(4) Also, for example, in paints for automotive parts, there are many types of binders constituting the paints (for example, binders for bumpers, binders for bodies, etc.). However, the conventional primary color paints have poor compatibility with different types of binders, so it is necessary to prepare primary color paints suitable for the binder used for the paints. For this reason, if the toning is performed automatically to improve the efficiency of the toning, it is necessary to provide more than 100 types of primary color paints. However, if there are more than 100 types of primary color paints, the problem of a place to secure the primary color paints and the piping to the raw material tank containing the primary color paints become complicated, and in fact, automatic color matching is difficult.

The present invention has been made in view of the above-described problems, and provides a target paint by mixing a primary color paint component having good compatibility with various binders, and toning the paint by liquid color measurement. Thus, the purpose of the present invention is to increase the efficiency of the processing relating to toning.

In order to solve the above problems, the present invention employs means for solving the problems, having the following features.

The invention according to claim 1 is a method for toning a desired paint by mixing a plurality of primary color paint components, the paint selecting step of selecting the desired paint; A blending determining step of determining the basic blending of the paint to be blended, and a blending step of blending and mixing the plurality of primary color paint components at a blending ratio determined in the blending determining step, and a paint mixed in the blending step. The liquid colorimetry step of performing liquid colorimetry, and comparing the optical characteristics specifying the target paint with the optical characteristics measured in the liquid colorimetry step, the difference between the two optical characteristics is a predetermined value. If it exceeds, a toning step of further blending and mixing the primary color paint components.

According to the first aspect of the present invention, in a toning method for obtaining a target paint by mixing a plurality of primary color paint components, a process relating to toning is made more efficient by using liquid colorimetry. can do.
According to a second aspect of the present invention, in the toning method according to the first aspect, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement step are changed. It has an output stage for outputting.

According to the second aspect of the present invention, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement stage are output, so that the optical characteristics of the two are output. Can be confirmed to be equal to or less than a predetermined value. This allows the paint manufacturer and the painter to confirm that the toning has been completed before painting.

The invention according to claim 3 is a coating method in which a target paint is obtained by mixing a plurality of primary color paint components, and coating is performed using the paint, wherein the target paint is selected. A selecting step, a blending determining step of determining a basic blending of the target paint, a blending step of blending and mixing the plurality of primary color paint components in a blending ratio determined in the blending determining step, and the blending step The liquid colorimetry step of performing liquid colorimetry on the mixed paint, and comparing the optical characteristics specifying the target paint with the optical characteristics measured in the liquid colorimetry step, and the optical characteristics of both When the difference exceeds a predetermined value, a toning step of further blending and mixing the primary color paint components, a dilution step of diluting the paint compounded in the blending step or the toning step, and a dilution step Filling to fill diluted paint And having a floor, and a coating step of coating with a filled in filling phase paint.

According to the invention described in claim 3, a target paint is obtained by mixing a plurality of primary color paint components, and in a coating method of coating using the paint, the primary color paint component is determined based on optical characteristics. Is blended, it is possible to perform toning based on the optical characteristics of the paint, and as a result, it is possible to increase the efficiency of the processing relating to the toning and the efficiency of the coating process.

According to a fourth aspect of the present invention, in the toning method according to the third aspect, when the difference between the two optical characteristics is equal to or smaller than a predetermined value, the optical characteristics measured in the liquid color measurement step are changed. It has an output stage for outputting.

According to the fourth aspect of the present invention, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement stage are output, so that the two optical characteristics are output. Can be confirmed to be equal to or less than a predetermined value. This allows the paint manufacturer and the painter to confirm that the toning has been completed before painting.

According to a fifth aspect of the present invention, in the coating method of the third or fourth aspect, a place where the painting step is performed and a place where the other steps are performed are close to each other.

According to the fifth aspect of the present invention, since the place where the painting step is performed and the place where the other steps are performed are close to each other, there is no need to transfer the manufactured paint.

An invention according to claim 6 is a toning apparatus for obtaining a target paint by mixing primary color paint components charged in a plurality of raw material tanks, wherein the primary color paint component is optically mixed. A raw material paint database having properties associated therewith, a paint database having optical properties and basic formulations associated with paint types, a paint selecting means for selecting the target paint, and the paint database. A blending means for determining a basic blending of the target paint, a blending means for blending and mixing the primary color paint components in a blending ratio determined by the blending determining means, and a paint mixed by the blending means. Liquid colorimetric means for liquid colorimetry, comparing the optical characteristics of the target paint obtained by referring to the paint database and the optical characteristics measured by the liquid colorimetric means, If the difference in optical characteristics is above a predetermined value of the raw coating material database See, and having a toning means for mixing and further blended the primary coating components.

According to the invention described in claim 6, a raw material paint database relating the optical properties to the primary color paint components, a paint database relating the optical properties and the basic composition to the type of paint, A paint selecting means for selecting a desired paint, a blend determining means for determining a basic blend of the target paint with reference to a paint database, and blending the primary color paint components in a blending ratio determined by the blend determining means. A mixing means for mixing and mixing, a liquid color measurement means for performing color measurement of the paint mixed by the mixing means, and an optical property of the target paint obtained by referring to the paint database and measured by the liquid color measurement means. By comparing the optical characteristics and, if the difference between the two optical characteristics exceeds a predetermined value, by referring to the raw material paint database, by having a toning means for further blending and mixing the primary color paint components It is possible to streamline the process relating to toning can be performed, the automatic toning with.

According to a seventh aspect of the present invention, in the toning method according to the sixth aspect, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured by the liquid colorimetric unit are changed. It is characterized by having output means for outputting.

According to the seventh aspect of the present invention, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement stage are output, so that the two optical characteristics are output. Can be confirmed to be equal to or less than a predetermined value. This allows the paint manufacturer and the painter to confirm that the toning has been completed before painting.

The invention described in claim 8 is the toning device according to claim 6 or 7, wherein the number of the plurality of raw material tanks is 64 or less.

According to the invention described in claim 8, since the number of the plurality of raw material tanks is 64 or less, the automatic toning device can be configured to be compact.

The invention according to claim 9 is a toning program in a toning device for obtaining a target paint by mixing primary color paint components charged in a plurality of raw material tanks, wherein the target paint is provided. A blending step of determining the basic blending, a blending step of blending and mixing the primary color paint components at a blending ratio determined in the blending determining step, and a liquid for measuring the paint mixed in the blending step. The colorimetry step, comparing the optical properties specifying the target paint and the optical properties measured in the liquid colorimetry step, and when the difference between the two optical properties exceeds a predetermined value, the A toning step of further blending and mixing the primary color paint components is performed by a computer.

According to the ninth aspect of the present invention, it is possible to provide a toning program in a toning device capable of increasing the efficiency of toning-related processing.

According to a tenth aspect of the present invention, in the toning program according to the ninth aspect, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement step are changed. It has an output stage for outputting.

According to the tenth aspect of the invention, when the difference between the two optical characteristics is equal to or less than a predetermined value, the optical characteristics measured in the liquid color measurement stage are output, so that the optical characteristics of both are output. Can be confirmed to be equal to or less than a predetermined value. This allows the paint manufacturer and the painter to confirm that the toning has been completed before painting.

According to the present invention, it is possible to obtain a target paint by mixing a plurality of primary color paint components, and perform toning of the paint by liquid color measurement, thereby making it possible to increase the efficiency of the process relating to toning. Become.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a flowchart of a coating system using the present invention.

(4) The painter decides, for example, a painting plan for the painting line on that day (or week, month, year, etc.), and the paint manufacturer decides a paint production plan based on the plan (S21). In this production plan, a production unit and necessary raw materials are set. In step 22, raw materials are systematically provided according to the plan in step 21. As a result, raw materials can be obtained just-in-time, so that inventory can be kept to a minimum.

Next, in step 23, raw materials are obtained and weighed for each production unit according to the plan set in step 21. The measured primary color paint components are mixed (S24), and automatic toning is performed (S25). When the desired paint is obtained by the automatic toning in step 25, complete dilution suitable for the line conditions is performed (S26), and the container is filled (S27). The paint filled in the container is put into the line (S28), and coating is performed (S29).
In addition, if necessary, at any stage after dilution, a coated plate can be prepared and the color can be evaluated.

FIG. 3 shows an example of the configuration of the automatic toning system of the present invention. 3 includes a control unit 10, a measuring unit 11, a raw material tank 12, a stirring unit 13, a diluting unit 14, a filling unit 15, an input / output unit 16, a design master characteristic file 17, a blending data master file 18, It is composed of a combination correction data file 19, an ejection data file 20, and a program file 21.

The control unit 10 controls the measuring unit 11, the raw material tank 12, the stirring unit 13, the diluting unit 14, the filling unit 15, and the input / output unit 16 based on an automatic color matching program or the like stored in the program file 21.
The weighing unit 11 obtains and weighs a raw material from the raw material tank 12 based on data provided from the control unit 10. The measuring unit 11 may measure the viscosity as needed. As the weighing unit 11, for example, “Corob Modula Dispenser” manufactured by Sun Color Corporation is used. This "Corob Modula Dispenser" has a maximum raw material count of 32 and a weighing accuracy of 1 percent in Plumai.
The raw material tank 12 is a tank containing a primary color paint component. The primary color paint component is a raw material constituting a paint such as a primary color paint and a glitter material component. For example, it has the configuration shown in FIG. Tank 4, the tank ₃₀ 1 to 30 _N of the primary coating components, and a valve ₃₁ 1 to 31 _N, and a pump ₃₂ 1 to 32 _N. Here, the tank primary coating components, e.g., tank ₃₀ 1 _{~30 N-2} of the primary coating material, the tank _{30 N-1} of the luminous material, a dilution tank 30 _N. The valves 31 _{1 to} 31 _N and the pumps 32 _{1 to} 32 _N are controlled based on a control signal from the control unit 10 or the measuring unit 11.
The stirrer 13 stirs when a predetermined amount of the primary color paint component is charged. In addition, it is preferable to attach and use a stirrer to the above-mentioned "Corob Modula Dispenser". Thus, the stirring unit 13 may be a part of the measuring unit 11.
When a desired paint is obtained, the diluting unit 14 dilutes the paint to a target concentration so that the paint is used in an actual paint line. Under the control of the control unit 10, dilution for achieving a concentration suitable for line conditions can also be performed.
The filling unit 15 fills the container with the paint diluted by the dilution unit 14. Use a container suitable for the coating line. For example, a cartridge can be used.
The input / output unit 16 is an input / output unit of the automatic color matching system, and inputs necessary data and outputs necessary data. In addition, the input / output unit 16 can control the automatic toning system, and can display the state of the toning and the like in the automatic toning system by a display device (not shown).
The design master property file 17 is a file that stores optical property data obtained by measuring the color of the paint of the design master in a liquid state and its combination data. These can be read out using the design master specifying symbol for specifying the design master as a key. The optical characteristic data and the combination data may be stored in separate files.
The blending data master file 18 stores the optical characteristics of the primary color paint components in advance.
The composition correction data file 19 stores composition correction data for correcting a difference from a desired optical characteristic when there is a difference. This is a database for determining the primary color paint components to be added and the compounding ratio thereof according to the state of the color difference. Interpolation processing is performed as necessary to determine the primary color paint components to be added and the mixing ratio thereof.
Note that the composition correction data file 19 can also be generated from the composition data master file 18, so that the composition correction data file 19 may be a part of the composition data master file 18.

The discharge data file 20 stores data on the relationship between the number of rotations of a pump connected to each raw material tank containing each primary color paint component and the discharge amount.
The program file 21 stores various programs used in the automatic toning system.

FIG. 5 shows an example of the sequence of the toning process in the present invention. First, a paint color is determined from the determined several design masters (S41). At this time, the basic composition data of the design master and the optical property data of the liquid state are obtained, and these are recorded in the design master property file 17.
Next, the paint is toned (S42). If the paint passes, the optical characteristic data of the toned paint is output (S43), diluted (S44), and filled in a container (S45). As described above, since the toning of the paint and the manufacture of the paint are performed based on the optical characteristics, automation becomes possible.

Next, the details of step 42 for toning the paint will be described. First, a symbol specifying the design master is input as a key, and the basic combination data of the design master and the optical property data of the liquid state are obtained from the design master property file 17 (S47). For example, a reflectance characteristic with respect to the wavelength of the design master as shown in FIG. 6 is obtained.
Next, based on the obtained basic blending data, the primary color paint components and their blending ratios are determined (S48). Based on the determined data, the primary color paint components necessary for the production of the paint are extracted from the raw material tank 12, weighed (S49), and mixed to produce the paint (S50). Liquid color measurement is performed using the paint (S51).
The optical characteristic data obtained in step 47 is compared with the optical characteristic data 22 obtained in step 51, and if there is no color difference (S52: No), the optical characteristic data is output (S43) and diluted (S43). (S44), filling the container (S45). Step 43 may be performed as a part of step 52.
Incidentally, in step 52, the optical characteristic data obtained in step 47 is compared with the optical characteristic data obtained in step 51, and as shown in FIG. If there is a color difference between S and the optical characteristic data A obtained in step 51 (S52: Yes), the necessary primary color paint components are added with reference to the combination correction data file 19 (S53), and the mixture is mixed. To produce a paint (S50). Usually, in step 53, one or more primary color paint components are added. Next, liquid color measurement is performed using the paint manufactured in step 50 (S51), and the optical characteristic data S obtained in step 47 is compared with the optical characteristic data A obtained in step 51 (S52). This step is repeated until the color difference between the two disappears.
Steps 47 to 53 can be performed by CCM (computer color matching).

As an example of a CCM device, as described in JP-A-2001-50891, a colored liquid is discharged and circulated by discharging to a surface including a measurement site of a cell, and a colored liquid at a measurement site of the cell is discharged. A liquid color measurement device that measures the color liquid filled in the cell while continuously updating the color liquid can be used. A liquid colorimetric device described in Japanese Patent Application Laid-Open No. 2001-50891 is commercialized. As shown in step 53, the colorimetric result of the sample is converted to a target value (the optical characteristic obtained in step 47). Data) can be obtained for additional formulation data. Further, the additional formulation data can be transmitted to the measuring section via a line.
Next, the primary color paint will be described.
It is preferable that the primary color paint used in the present invention basically comprises a color pigment, a binder component for dispersing a pigment, and a pigment dispersant. Here, the binder component for dispersing the pigment comprises a hydroxyl group-containing acrylic resin and a nitrified cotton-modified acrylic resin. It is preferable that these pigment dispersing binder components satisfy the following conditions for the SP value.
-SP value of hydroxyl-containing acrylic resin: 10.2 to 10.8
-SP value of acrylic resin component before modification in nitrified cotton modified acrylic resin: 10.0 to 10.5
-SP value of hydroxyl group-containing acrylic resin-SP value of acrylic resin component before modification in the above-mentioned nitrified cotton-modified acrylic resin: 0 to 0.52
The SP value can be determined by a method well known to those skilled in the art, such as a turbidity method.
The preferred composition ratio of each component in the primary color paint is, when the binder component for pigment dispersion and the pigment dispersant are 100 parts by mass, the pigment dispersant is 0.5 to 15 parts by mass, and the hydroxyl group-containing acrylic resin is 75 to 99 parts by mass. Parts, the nitrified cotton-modified acrylic resin is 0 to 75 parts by mass, preferably 0.5 to 25 parts by mass. The amount of the color pigment is not particularly limited, but may be, for example, 20 to 90% by mass based on the total solid content of the primary color paint.

By using the primary color paint of such a composition, the solubility of various paints in the binder component can be ensured, so that it is not necessary to prepare each primary color paint for each paint component, and the number of raw material tanks can be reduced to the conventional one. In comparison, the number can be significantly reduced, and as a result, the automatic toning device can be made compact. The number of raw material tanks is preferably 64 or less, and more preferably 32 or less.
The weighing section is capable of automatic weighing and may be simply a weighing section. Alternatively, data may be obtained from the control section, and valves 31 _{1 to} 31 _N of tanks 30 ₁ to 30 _N for primary color paint components may be obtained. and a pump ₃₂ 1 to 32 _N may be controlled.

Further, instead of the reflectance characteristic with respect to the wavelength, the tristimulus values “X _D , Y _D , Z _D ” in the XYZ color system standardized by the International Commission on Illumination (CIE) may be used instead of the reflectance characteristic with respect to the wavelength. Alternatively, “L ^* a ^* b ^* ” in the “CIEL ^* a ^* b ^* ” display system standardized by the International Commission on Illumination (CIE) may be used. These may be used in combination.

In the present invention, between the paint manufacturer and the painter, the decision to carry out the coating with the manufactured paint, instead of confirming by making a paint plate from the paint as before, directly paint the paint It is necessary to previously determine that the measurement should be performed based on the data obtained by the liquid color measurement. If the difference between the data obtained by the liquid color measurement and the data of the selected design master is equal to or less than a predetermined value, it is determined that the coating is to be performed. A system for making decisions can also be constructed. In addition, if the value is less than the predetermined value, the system is constructed so that the value is displayed on a display or printed on paper with a printer to check the value below the predetermined value and then proceed to the next stage. May be. The output difference value is stored on paper or various recording media, and can be used as a material for investigating the cause when an abnormality occurs during painting.

Next, effects of the embodiment of the present invention will be described.
(1) Since the toning of the paint is performed by liquid color measurement, the time and labor required for toning the paint can be saved.

FIG. 8 shows the time required for toning according to the embodiment of the present invention and the time required for toning by conventional toning. FIG. 5 is a diagram comparing FIG. 1 in the conventional example with FIG. 5 in the embodiment of the present invention when the primary color paint component is added three times.

As a reference for comparison, it takes 5 minutes for judgment, 10 minutes for adding primary colors, and 70 minutes for painting. In the conventional case, it is necessary to prepare a coated plate in advance. On the other hand, in the embodiment of the present invention, it is necessary to measure in advance the optical characteristics of the paint of the design master in the liquid state. Note that FIG. 8 shows a case in which a painted plate is manufactured at the end and the color is checked, just in case.

According to FIG. 8, the time required for toning according to the embodiment of the present invention is 160 minutes, whereas the time required for toning by the conventional toning requires 325 minutes.

In this way, the time and labor required for toning the paint can be saved.
(2) In the toning stage of paint, many coated boards are not produced, and resources are not wasted.
(3) No special skills such as craftsmanship are required, and automatic toning is possible.
(4) Since paint is manufactured in the required amount of paint, the amount of paint to be discarded is reduced, and there is no need to store paint for a long time. Less likely to occur.
(5) The number of primary color paints is reduced, and efficient automatic toning becomes possible.

FIG. 9 is a diagram for explaining a sequence of a toning process in a conventional coating. 1 is a flowchart of a coating system using the present invention. FIG. 2 is a diagram for describing an example of a configuration of an automatic toning system of the present invention. It is a figure for explaining a tank which stores a raw material used for paint. 5 is an example of a sequence of a toning process in the present invention. It is an example of the reflectance characteristic with respect to the wavelength of a design master. This is an example in which there is a color difference between the optical characteristic data S obtained in step 47 and the optical characteristic data A obtained in step 51. FIG. 4 is a diagram for explaining effects of the embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Primary color tank 2 Sample board 10 Control part 11 Metering part 12 Raw material tank 13 Stirring part 14 Dilution part 15 Filling part 16 Input / output part 17 Design master characteristic file 18 Mixing data master file 19 Mixing correction data file 20 Discharge data file 21 Program file 22 optical characteristic data 30 ₁ ~30 _N-2 primary coating material tank _{30 N-1} tank 30 _N dilution tank 31 valve 32 pump glitter material component

Claims (10)

A toning method for obtaining a target paint by mixing a plurality of primary color paint components,
Paint selection step of selecting the target paint,
A compound determination step of determining a basic compound of the target paint,
A compounding step of compounding and mixing the plurality of primary color paint components at the compounding ratio determined in the compounding determining step,
A liquid colorimetric step of performing liquid colorimetry on the paint mixed in the compounding step,
Compare the optical characteristics specifying the target paint and the optical characteristics measured in the liquid color measurement step, and when the difference between the two optical characteristics exceeds a predetermined value, further the primary color paint component Toning stage to mix and mix,
A toning method comprising: The method according to claim 1, further comprising an output step of outputting the optical property measured in the liquid color measurement step when the difference between the two optical properties is equal to or less than a predetermined value. A coating method in which a target paint is obtained by mixing a plurality of primary color paint components, and coating is performed using the paint.
Paint selection step of selecting the target paint,
A compound determination step of determining a basic compound of the target paint,
A compounding step of compounding and mixing the plurality of primary color paint components at the compounding ratio determined in the compounding determining step,
A liquid colorimetric step of performing liquid colorimetry on the paint mixed in the compounding step,
Compare the optical characteristics specifying the target paint and the optical characteristics measured in the liquid color measurement step, and when the difference between the two optical characteristics exceeds a predetermined value, further the primary color paint component Toning stage to mix and mix,
A dilution step of diluting the paint compounded in the compounding step or the toning step;
A filling step of filling the diluted paint in the dilution step,
A painting step of painting with the paint filled in the filling step,
A coating method comprising: 4. The coating method according to claim 3, further comprising an output step of outputting the optical property measured in the liquid color measurement step when the difference between the two optical properties is equal to or less than a predetermined value. 5. The coating method according to claim 3, wherein a place where the painting step is performed and a place where the other steps are performed are close to each other. A toning device for obtaining a target paint by mixing primary color paint components charged in a plurality of raw material tanks,
A raw material paint database relating optical properties to the primary color paint components,
A paint database relating optical properties and basic formulations to paint types,
Paint selection means for selecting the target paint,
With reference to the paint database, blending determination means for determining the basic blend of the target paint,
Blending means for blending and mixing the primary color paint components at a blending ratio determined by the blending determining means,
Liquid color measurement means for measuring the color of the paint mixed by the compounding means,
Compare the optical properties of the target paint obtained by referring to the paint database and the optical properties measured by the liquid colorimetric means, when the difference between the two optical properties exceeds a predetermined value Referring to the raw material paint database, toning means for further blending and mixing the primary color paint components,
A toning device comprising: 7. The toning device according to claim 6, further comprising an output unit that outputs the optical characteristic measured by the liquid colorimetric unit when the difference between the two optical characteristics is equal to or less than a predetermined value. 8. The toning device according to claim 6, wherein the number of the plurality of raw material tanks is 64 or less. A toning program in a toning device for obtaining a target paint by mixing primary color paint components charged in a plurality of raw material tanks,
A compound determination step of determining a basic compound of the target paint,
A compounding step of compounding and mixing the primary color paint components at the compounding ratio determined in the compounding determining step,
A liquid colorimetric step of performing liquid colorimetry on the paint mixed in the compounding step,
Compare the optical characteristics specifying the target paint and the optical characteristics measured in the liquid color measurement step, and when the difference between the two optical characteristics exceeds a predetermined value, further the primary color paint component Toning stage to mix and mix,
A toning program characterized by causing a computer to perform the following. 10. The toning program according to claim 9, further comprising an output step of outputting the optical property measured in the liquid color measurement step when the difference between the two optical properties is equal to or less than a predetermined value.

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