JP2011152521A - Recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that it is hard to improve the quality of an image in conventional recording methods. <P>SOLUTION: The recording method includes a step S21 of forming a drawing pattern and a step S22 for curing the drawing pattern. The step S21 includes: a step of applying paint, which has a photocurable property facilitating curing in response to light irradiation, to a recording medium; a step of irradiating the paint adhered to the recording medium with light after the step of applying the paint; and a step of superimposing additional paint over the paint irradiated with the light. The step of irradiating the paint with the light controls the curing rate of the paint to be less than 40%. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a recording method and the like.

2. Description of the Related Art Conventionally, a method (recording method) for recording on a recording medium with a liquid material whose curing is accelerated by irradiation with ultraviolet light is known.
As such a recording method, there is a recording method in which the degree of cure (polymerization rate) of a liquid material when irradiated with ultraviolet light for the first time is 40 to 70% (for example, see Patent Document 1).

Japanese Patent No. 4147943

In recording using a liquid material whose curing is accelerated by being irradiated with ultraviolet light, the recording medium to be recorded is not limited to paper. As the recording medium, various materials and forms such as a fiber sheet such as cloth and nonwoven fabric, a substrate such as plastic, resin, and glass can be applied as long as an image can be formed by adhering a liquid.
Depending on the combination of the composition of the liquid and the material and form of the recording medium, the liquid may not easily penetrate the recording medium. In such a case, the liquid adhering to the recording medium is solidified while protruding from the surface of the recording medium.

When expressing gradation and color, a plurality of liquid materials may be superimposed. In the recording method described in Patent Document 1, irregularities may occur in the image when the liquid does not easily penetrate the recording medium. The unevenness generated in the image may be visually recognized as an unintended streak pattern. For this reason, the unevenness | corrugation which generate | occur | produces in an image tends to reduce the quality of an image.
That is, the conventional recording method has a problem that it is difficult to improve image quality.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] An application step of applying a photo-curing paint, which is a property of promoting curing upon irradiation of light, to the recording medium, and the coating material adhering to the recording medium after the applying process A light irradiating step of irradiating light, and a superimposing application step of applying a new coating material on the irradiated coating material that is the coating material that has received the light irradiation. A recording method characterized in that the curing rate of the irradiated paint is less than 40%.

The recording method of this application example includes a coating process, a light irradiation process, and a superimposing coating process.
In the applying step, the paint is applied to the recording medium. The paint has photocurability. The photo-curing property is a property that curing is accelerated by light irradiation.
After the coating process, in the light irradiation process, light is applied to the paint adhering to the recording medium. Thereby, hardening of the coating material adhering to the recording medium is promoted.
In the superimposing application process, a new paint is applied to the irradiated paint in an overlapping manner. The paint to be irradiated is a paint that has been irradiated with light.
In this recording method, the curing rate of the paint adhering to the recording medium is set to less than 40% in the light irradiation step. The cure rate is the ratio of the polymerized paint at the reaction site of the paint. The curing rate is equal to the polymerization rate, for example, in the case of a paint whose polymerization is accelerated by light irradiation.
In this recording method, since the new paint is applied repeatedly to the irradiated paint having a curing rate of less than 40%, the irradiated paint having a curing rate of less than 40% and the new paint are easily compatible with each other. For this reason, the boundary between the irradiated paint having a curing rate of less than 40% and the new paint tends to be smooth. As a result, in the image expressed by the paint, it is possible to easily suppress the occurrence of unevenness, so that the quality of the image can be easily improved.

  Application Example 2 In the recording method described above, when the new paint and the irradiated paint have the same type of color, in the light irradiation step, the curing rate of the irradiated paint is set to 5 % Or more of the recording method.

  In this application example, when the new paint and the paint to be irradiated have the same color, the curing rate of the paint to be irradiated is set to 5% or more in the light irradiation process, so that the paint to be irradiated is fixed. It can be made easier.

  Application Example 3 In the recording method described above, when the new paint and the irradiated paint have different types of colors, in the light irradiation step, the curing rate of the irradiated paint is set to 20 % Or more of the recording method.

  In this application example, when the new paint and the irradiated paint have different colors, the curing rate in the irradiated paint is set to 20% or more in the light irradiation process. It is possible to easily suppress the color mixture with the paint.

  Application Example 4 In the recording method described above, in the application step, the paint is applied to the recording medium by ejecting the paint onto the recording medium by an inkjet method. .

  In this application example, in the coating step, the coating material is ejected onto the recording medium by the ink jet method, so that the coating material can be applied to the recording medium.

  Application Example 5 In the recording method described above, in the superimposing application step, the new paint is applied over the paint by discharging the new paint by an inkjet method. Recording method.

  In this application example, since the new paint is ejected by the ink jet method in the superimposing application process, the new paint can be applied over the paint.

FIG. 2 is a perspective view illustrating a schematic configuration of a droplet discharge device according to the present embodiment. The front view when the carriage in this embodiment is seen in the A viewing direction in FIG. The bottom view of the head unit in this embodiment. Sectional drawing in the BB line in FIG. FIG. 2 is a block diagram illustrating a schematic configuration of a droplet discharge device according to the present embodiment. The figure which shows the flow of the drawing process in this embodiment. The figure which shows the flow of the recording method in this embodiment. Sectional drawing which shows typically the drawing pattern in a present Example. The figure explaining the flow of formation of the drawing pattern in a present Example.

  Embodiments will be described with reference to the drawings, taking as an example a droplet discharge device which is one of the recording devices. In addition, in each drawing, in order to make each structure the size which can be recognized, the structure and the scale of a member may differ.

As shown in FIG. 1, which is a perspective view showing a schematic configuration, the droplet discharge device 1 in the embodiment includes a work transfer device 3, a carriage 7, a carriage transfer device 9, and a maintenance device 11. ing.
The carriage 7 is provided with a head unit 13 and two irradiation devices 15.
In the droplet discharge device 1, the liquid material is discharged from the head unit 13 as droplets while changing the relative position of the head unit 13 and the workpiece W such as a substrate in a plan view. A desired pattern can be drawn. In the figure, the Y direction indicates the moving direction of the workpiece W, and the X direction indicates a direction orthogonal to the Y direction in plan view. A direction orthogonal to the XY plane defined by the X direction and the Y direction is defined as the Z direction.

Such a droplet discharge device 1 can be applied to, for example, the manufacture of a color filter used for a liquid crystal display panel or the like, or the manufacture of an organic EL device.
In the case of a color filter having three color filter elements of red, green, and blue, the droplet discharge device 1 can be suitably used, for example, in a process of forming red, green, and blue colored layers on a substrate. In this case, each liquid material corresponding to each colored layer is ejected from the head unit 13 as droplets onto the work W, whereby the patterns of the red, green, and blue filter elements are drawn on the work W.
Further, in the manufacture of an organic EL device, for example, it can be suitably used in a step of forming a functional layer (organic layer) corresponding to each color for each of red, green and blue pixels. In this case, each liquid material corresponding to the functional layer of each color is ejected from the head unit 13 as droplets onto the work W, whereby the patterns of the red, green, and blue functional layers are drawn on the work W.

Here, the details of each component of the droplet discharge device 1 will be described.
As shown in FIG. 1, the work transfer device 3 includes a surface plate 21, a guide rail 23 a, a guide rail 23 b, a work table 25, and a table position detection device 27.
The surface plate 21 is made of a material having a small coefficient of thermal expansion, such as stone, and is placed so as to extend along the Y direction. The guide rail 23 a and the guide rail 23 b are disposed on the upper surface 21 a of the surface plate 21. Each of the guide rail 23a and the guide rail 23b extends along the Y direction. The guide rail 23a and the guide rail 23b are arranged in a state where there is a gap in the X direction.

The work table 25 is provided in a state facing the upper surface 21a of the surface plate 21 with the guide rail 23a and the guide rail 23b interposed therebetween. The work table 25 is placed on the guide rail 23a and the guide rail 23b in a state of floating from the surface plate 21. The work table 25 has a placement surface 25a that is a surface on which the workpiece W is placed. The placement surface 25a is directed to the side (upper side) opposite to the surface plate 21 side. The work table 25 is guided along the Y direction by the guide rail 23a and the guide rail 23b, and is configured to be able to reciprocate on the surface plate 21 along the Y direction.
The table position detector 27 is provided on the upper surface 21a of the surface plate 21, and extends in the Y direction. The table position detection device 27 is provided between the guide rail 23a and the guide rail 23b. The table position detector 27 detects the position of the work table 25 in the Y direction.

The work table 25 is configured to reciprocate in the Y direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In the present embodiment, a work transfer motor described later is employed as a power source for moving the work table 25 along the Y direction. As the work transfer motor, various motors such as a stepping motor, a servo motor, and a linear motor can be adopted.
The power from the work transport motor is transmitted to the work table 25 through the moving mechanism. Thereby, the work table 25 can reciprocate along the guide rail 23a and the guide rail 23b, that is, along the Y direction. That is, the workpiece transfer device 3 can reciprocate the workpiece W placed on the placement surface 25a of the workpiece table 25 along the Y direction.

The head unit 13 includes a head plate 31 and an ejection head 33 as shown in FIG. 2 which is a front view when the carriage 7 is viewed in the direction A in FIG.
As shown in FIG. 3 which is a bottom view, the discharge head 33 has a nozzle surface 35. A plurality of nozzles 37 are formed on the nozzle surface 35. In FIG. 3, the nozzles 37 are exaggerated and the number of the nozzles 37 is reduced in order to easily show the nozzles 37.
In the ejection head 33, the plurality of nozzles 37 constitute twelve nozzle rows 39 arranged along the Y direction. The twelve nozzle rows 39 are arranged in a state where there is a gap in the X direction. In each nozzle row 39, the plurality of nozzles 37 are formed at a predetermined nozzle interval P along the Y direction.

In the following, when each of the 12 nozzle rows 39 is identified, the nozzle row 39a, the nozzle row 39b, the nozzle row 39c, the nozzle row 39d, the nozzle row 39e, the nozzle row 39f, the nozzle row 39g, the nozzle row 39h, The notation of nozzle row 39i, nozzle row 39j, nozzle row 39k, and nozzle row 39m is used.
In the ejection head 33, the nozzle row 39a and the nozzle row 39b are shifted from each other by a distance of P / 2 in the Y direction. The nozzle row 39c and the nozzle row 39d are also shifted from each other by a distance of P / 2 in the Y direction. Similarly, the nozzle row 39e and the nozzle row 39f are also shifted from each other by a distance of P / 2 in the Y direction, and the nozzle row 39g and the nozzle row 39h are also shifted from each other by a distance of P / 2 in the Y direction. Similarly, the nozzle row 39i and the nozzle row 39j are also shifted from each other by a distance of P / 2 in the Y direction, and the nozzle row 39k and the nozzle row 39m are also shifted from each other by a distance of P / 2 in the Y direction.

As shown in FIG. 2, the two irradiation devices 15 are provided at positions facing each other with the head unit 13 interposed therebetween in the X direction. Hereinafter, when identifying each of the two irradiation devices 15, the notation of the irradiation device 15a and the irradiation device 15b is used.
Each of the irradiation device 15 a and the irradiation device 15 b includes a light source 43 that emits ultraviolet light 41. The ultraviolet light 41 from the light source 43 promotes curing of the liquid material 45 ejected from the ejection head 33. When the liquid 45 is irradiated with the ultraviolet light 41, curing is accelerated.
As the light source 43, various light sources 43, such as LED, LD, a mercury lamp, a metal halide lamp, a xenon lamp, an excimer lamp, can be employ | adopted, for example.

The ejection head 33 includes a nozzle plate 46, a cavity plate 47, a diaphragm 48, and a plurality of piezoelectric elements 49, as shown in FIG. 4 which is a cross-sectional view taken along the line BB in FIG. is doing.
The nozzle plate 46 has a nozzle surface 35. The plurality of nozzles 37 are provided on the nozzle plate 46.
The cavity plate 47 is provided on the surface opposite to the nozzle surface 35 of the nozzle plate 46. A plurality of cavities 51 are formed in the cavity plate 47. Each cavity 51 is provided corresponding to each nozzle 37 and communicates with each corresponding nozzle 37. The functional liquid 53 is supplied to each cavity 51 from a tank (not shown).

The diaphragm 48 is provided on the surface of the cavity plate 47 opposite to the nozzle plate 46 side. The vibration plate 48 vibrates in the Z direction (longitudinal vibration), thereby enlarging or reducing the volume in the cavity 51.
The plurality of piezoelectric elements 49 are respectively provided on the surface of the diaphragm 48 opposite to the cavity plate 47 side. Each piezoelectric element 49 is provided corresponding to each cavity 51 and faces each cavity 51 with the diaphragm 48 interposed therebetween. Each piezoelectric element 49 expands based on the drive signal. Thereby, the diaphragm 48 reduces the volume in the cavity 51. At this time, pressure is applied to the functional liquid 53 in the cavity 51. As a result, the functional liquid 53 is discharged as droplets 55 from the nozzle 37. The method of discharging the droplet 55 by the discharge head 33 is one of ink jet methods. The ink jet method is one of coating methods.

As shown in FIG. 2, the ejection head 33 having the above configuration is supported by the head plate 31 with the nozzle surface 35 protruding from the head plate 31.
As shown in FIG. 2, the carriage 7 supports the head unit 13. Here, the head unit 13 is supported by the carriage 7 with the nozzle surface 35 facing downward in the Z direction.
In the present embodiment, the longitudinal vibration type piezoelectric element 49 is adopted, but the pressurizing means for applying pressure to the functional liquid 53 is not limited to this, and for example, the lower electrode and the piezoelectric layer A flexural deformation type piezoelectric element in which an electrode and an upper electrode are laminated may be employed. Further, as the pressurizing means, a so-called electrostatic actuator that generates static electricity between the diaphragm and the electrode, deforms the diaphragm by electrostatic force, and ejects droplets from the nozzles can be employed. Furthermore, the structure which generate | occur | produces a bubble in a nozzle using a heat generating body, and gives a pressure to a functional liquid with the bubble may be employ | adopted.

In the present embodiment, a liquid 45 that is cured by being irradiated with light is used as the functional liquid 53. In the present embodiment, ultraviolet light 41 (FIG. 2) is adopted as light that accelerates the curing of the liquid material 45.
The liquid body 45 contains a resin material, a photopolymerization initiator, and a solvent as components. By adding functional materials such as pigments and dyes such as pigments and surface modifying materials such as lyophilic and liquid repellent properties to these components, a liquid 45 having a specific function can be generated. . The liquid 45 containing a pigment such as a pigment or a dye can be employed as the functional liquid 53 for forming an image drawn on the workpiece W, for example. Hereinafter, the liquid 45 as the functional liquid 53 for forming an image to be drawn on the workpiece W is referred to as image paint.

Further, by adopting a resin material having optical transparency such as an acrylic resin material as the resin material as a component of the liquid material 45, the functional liquid 53 having optical transparency can be configured. Such a light-transmitting functional liquid 53 may be used as a clear ink, for example. Hereinafter, the functional liquid 53 having light transmittance is referred to as a light-transmitting paint.
As the use of the clear ink, for example, a use as an overcoat layer for covering an image, a use as a base layer before forming an image, and the like can be considered. In the following, the functional liquid 53 applied as a base layer is referred to as a base paint.
As the base paint, not only the translucent paint but also a functional liquid 53 in which various pigments are added to the translucent paint can be employed.
The resin material in the liquid body 45 is a material that forms a resin film. Such a resin material is not particularly limited as long as it is a liquid material at room temperature and becomes a polymer by being polymerized. The resin material preferably has a low viscosity, and is preferably in the form of an oligomer. Furthermore, the resin material is more preferably in the form of a monomer.
The photopolymerization initiator is an additive that acts on the crosslinkable group of the polymer to advance the crosslinking reaction. As the photopolymerization initiator, for example, benzyldimethyl ketal can be employed. In this embodiment, a radical photopolymerization initiator is employed as the photopolymerization initiator. As the radical type photopolymerization initiator, for example, Irgacure 819 manufactured by Ciba Japan Co., Ltd. may be employed.
The solvent is for adjusting the viscosity of the resin material.

In the present embodiment, as the functional liquid 53, five types of image paints having different colors and one type of translucent paint are employed. In the five types of image paints, mutually different colors are yellow (Y), magenta (M), cyan (C), black (K), and white (W), respectively.
In the following description, when the five types of functional liquid 53 are identified for each color, the notations of the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, the functional liquid 53K, and the functional liquid 53W are used. In addition, the functional liquid 53 corresponding to the light-transmitting paint is used as a functional liquid 53T.
In the present embodiment, five different color image paints (functional liquid 53) are employed, so that color display in an image can be realized.
In the ejection head 33, the above-described 12 nozzle rows 39 (FIG. 3) are divided for each color of the functional liquid 53. In the present embodiment, the nozzles 37 belonging to the nozzle row 39a and the nozzle row 39b discharge the functional liquid 53K as droplets 55. The nozzles 37 belonging to the nozzle row 39c and the nozzle row 39d discharge the functional liquid 53C as droplets 55. The nozzles 37 belonging to the nozzle row 39e and the nozzle row 39f discharge the functional liquid 53M as droplets 55. The nozzles 37 belonging to the nozzle row 39g and the nozzle row 39h discharge the functional liquid 53Y as droplets 55. The nozzles 37 belonging to the nozzle row 39i and the nozzle row 39j discharge the functional liquid 53W as droplets 55. The nozzles 37 belonging to the nozzle row 39k and the nozzle row 39m discharge the functional liquid 53T as droplets 55.

As shown in FIG. 1, the carriage conveyance device 9 includes a gantry 61, a guide rail 63, and a carriage position detection device 65.
The gantry 61 extends in the X direction, and straddles the workpiece transfer device 3 and the maintenance device 11 in the X direction. The gantry 61 is opposite to the surface plate 21 side of the work table 25, and faces the work transfer device 3 and the maintenance device 11. The gantry 61 is supported by a column 67a and a column 67b. The column 67a and the column 67b are provided at positions facing each other in the X direction across the surface plate 21. Each of the support columns 67a and the support columns 67b protrudes above the work table 25 in the Z direction. Thereby, the clearance gap is maintained between the mount frame 61 and the work table 25, and between the mount frame 61 and the maintenance apparatus 11, respectively.

The guide rail 63 is provided on the surface plate 21 side of the gantry 61. The guide rail 63 extends along the X direction, and is provided across the width of the gantry 61 in the X direction.
The carriage 7 described above is supported by the guide rail 63. In a state where the carriage 7 is supported by the guide rail 63, the nozzle surface 35 of the discharge head 33 faces the work table 25 side in the Z direction. The carriage 7 is guided along the X direction by the guide rail 63, and is supported by the guide rail 63 so as to be able to reciprocate in the X direction. In a plan view, in a state where the carriage 7 overlaps the work table 25, the nozzle surface 35 and the mounting surface 25a of the work table 25 face each other with a gap therebetween.
The carriage position detection device 65 is provided between the gantry 61 and the carriage 7 and extends in the X direction. The carriage position detection device 65 detects the position of the carriage 7 in the X direction.

The carriage 7 is configured to reciprocate in the X direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In the present embodiment, a carriage transport motor, which will be described later, is employed as a power source for moving the carriage 7 along the X direction. As the carriage conveyance motor, various motors such as a stepping motor, a servo motor, and a linear motor can be employed.
The power from the carriage transport motor is transmitted to the carriage 7 through the moving mechanism. Thus, the carriage 7 can reciprocate along the guide rail 63, that is, along the X direction. That is, the carriage conveyance device 9 can reciprocate the head unit 13 supported by the carriage 7 along the X direction.

As shown in FIG. 1, the maintenance device 11 includes a surface plate 71, a guide rail 73a, a guide rail 73b, a maintenance table 75, a capping unit 76, a flushing unit 77, and a wiping unit 79. ing.
The surface plate 71 is made of a material having a small coefficient of thermal expansion, such as stone, and is provided at a position facing the surface plate 21 across the support 67a in the X direction.
The guide rail 73 a and the guide rail 73 b are disposed on the upper surface 71 a of the surface plate 71. Each of the guide rail 73a and the guide rail 73b extends along the Y direction. The guide rail 73a and the guide rail 73b are lined up with a gap in the X direction.
The maintenance table 75 is provided in a state facing the upper surface 71a of the surface plate 71 with the guide rail 73a and the guide rail 73b interposed therebetween. The maintenance table 75 is placed on the guide rail 73a and the guide rail 73b in a state of floating from the surface plate 71.

On the maintenance table 75, maintenance units such as a capping unit 76, a flushing unit 77, and a wiping unit 79 are placed. In the present embodiment, the maintenance unit includes a capping unit 76, a flushing unit 77, and a wiping unit 79.
The maintenance table 75 is guided along the Y direction by the guide rail 73a and the guide rail 73b, and is configured to reciprocate on the surface plate 71 along the Y direction.
The flushing unit 77 is provided on the side of the maintenance table 75 opposite to the surface plate 71 side.
Here, regardless of the pattern drawing on the workpiece W, the operation of discharging the liquid material from the discharge head 33 is called a flushing operation. For example, the flushing operation has an effect of preventing the liquid material staying in the nozzle 37 from solidifying in the nozzle 37. The flushing unit 77 is a device that receives the liquid material ejected from the ejection head 33 during the flushing operation.

  The capping unit 76 is a device that covers the ejection head 33. In the liquid discharged from the discharge head 33, the liquid component may evaporate. Generally, when the liquid component in the liquid material evaporates, the viscosity of the liquid material increases. When the viscosity of the liquid in the ejection head 33 increases, the performance of ejecting the droplets 55 in the nozzle 37 (hereinafter referred to as ejection performance) may decrease. Examples of the drop in the discharge performance include a case where the traveling direction of the droplet 55 discharged from the nozzle 37 is bent (flight bend), or the droplet 55 is not discharged from the nozzle 37 (non-discharge). Can be mentioned. The operation of covering the ejection head 33 with the capping unit 76 is called a capping operation.

The capping unit 76 covers the ejection head 33 to keep the liquid component in the liquid material from evaporating from the nozzles low. Thereby, the discharge performance in the discharge head 33 can be easily maintained.
The wiping unit 79 is a device that wipes the nozzle surface 35 of the ejection head 33. In the droplet discharge device 1, a liquid material may adhere to the nozzle surface 35. If the liquid material adheres to the nozzle surface 35, the ejection performance of the ejection head 33 may be degraded. The wiping unit 79 wipes the liquid material adhering to the nozzle surface 35 by wiping the nozzle surface 35. Thereby, the discharge performance in the discharge head 33 can be easily maintained. The operation of wiping the nozzle surface 35 with the wiping unit 79 is called a wiping operation.

The maintenance table 75 is configured to reciprocate in the Y direction by a moving mechanism and a power source (not shown). As the moving mechanism, for example, a mechanism combining a ball screw and a ball nut, a linear guide mechanism, or the like may be employed. In the present embodiment, a table transport motor, which will be described later, is adopted as a power source for moving the maintenance table 75 along the Y direction. Various motors such as a stepping motor, a servo motor, and a linear motor can be adopted as the table transport motor.
The power from the table transport motor is transmitted to the maintenance table 75 via the moving mechanism. Thereby, the maintenance table 75 can reciprocate along the guide rail 73a and the guide rail 73b, that is, along the Y direction.
That is, the maintenance device 11 can reciprocate maintenance units such as the capping unit 76, the flushing unit 77, and the wiping unit 79 along the Y direction. Thereby, the ejection head 33 can be made to face the capping unit 76, the flushing unit 77, and the wiping unit 79 in a state where the ejection head 33 overlaps the maintenance device 11 in plan view.

As shown in FIG. 5, the droplet discharge device 1 includes a control unit 111 that controls the operation of each of the above-described configurations. The control unit 111 includes a CPU (Central Processing Unit) 113, a drive control unit 115, and a memory unit 117. The drive control unit 115 and the memory unit 117 are connected to the CPU 113 via the bus 119.
The droplet discharge device 1 includes a carriage transport motor 121, a work transport motor 123, a table transport motor 125, an input device 129, and a display device 131.
The carriage transport motor 121, the work transport motor 123, and the table transport motor 125 are connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively. The input device 129 and the display device 131 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively.

The carriage transport motor 121 generates power for driving the carriage 7. The work conveyance motor 123 generates power for driving the work table 25. The table transport motor 125 generates power for driving the maintenance table 75. The input device 129 is a device for inputting various processing conditions. The display device 131 is a device that displays processing conditions and work status. An operator who operates the droplet discharge device 1 can input various information via the input device 129 while confirming information displayed on the display device 131.
The carriage position detection device 65, the table position detection device 27, and the ejection head 33 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively. The two irradiation devices 15 and the maintenance device 11 are also connected to the control unit 111 via the input / output interface 133 and the bus 119, respectively.

The CPU 113 performs various arithmetic processes as a processor. The drive control unit 115 controls driving of each component. The memory unit 117 includes a RAM (Random Access Memory), a ROM (Read-Only Memory), and the like. In the memory unit 117, an area for storing the program software 135 in which the operation control procedure in the droplet discharge device 1 is described, a data development unit 137 that is an area for temporarily developing various data, and the like are set. Yes. Examples of data developed in the data development unit 137 include drawing data indicating a pattern to be drawn, program data such as drawing processing, and the like.
The drive control unit 115 includes a motor control unit 141, a position detection control unit 143, a discharge control unit 145, an irradiation control unit 147, a maintenance control unit 149, and a display control unit 151.

The motor control unit 141 individually controls the drive of the carriage transport motor 121, the drive of the work transport motor 123, and the drive of the table transport motor 125 based on a command from the CPU 113.
The position detection control unit 143 individually controls the carriage position detection device 65 and the table position detection device 27 based on a command from the CPU 113.
The position detection control unit 143 causes the carriage position detection device 65 to detect the position of the carriage 7 in the X direction based on a command from the CPU 113 and outputs the detection result to the CPU 113.
Further, the position detection control unit 143 causes the table position detection device 27 to detect the position of the work table 25 in the Y direction based on a command from the CPU 113 and outputs the detection result to the CPU 113.

The discharge controller 145 controls the driving of the discharge head 33 based on a command from the CPU 113.
The irradiation control unit 147 individually controls the light emission state of the light source 43 in each of the irradiation device 15a and the irradiation device 15b based on a command from the CPU 113.
The maintenance control unit 149 individually controls driving of maintenance units such as the capping unit 76, the flushing unit 77, and the wiping unit 79 in the maintenance device 11 based on a command from the CPU 113.
The display control unit 151 controls driving of the display device 131 based on a command from the CPU 113.

Here, the drawing process in the droplet discharge device 1 will be described.
In the droplet discharge device 1, when the control unit 111 receives drawing data from the input device 129 via the input / output interface 133 and the bus 119, the drawing process shown in FIG. 6 is started by the CPU 113.
Here, the drawing data indicates a pattern to be drawn on the workpiece W with the functional liquid 53 (liquid material), and the pattern to be drawn is expressed in a bitmap shape. The pattern is drawn on the workpiece W while the ejection head 33 is opposed to the workpiece W, while the ejection head 33 and the workpiece W are relatively reciprocated, the droplet 55 is ejected from the ejection head 33 at a predetermined cycle. Is done by letting

In the drawing process, the CPU 113 first outputs a carriage conveyance command to the motor control unit 141 (FIG. 5) in step S1. At this time, the motor control unit 141 controls the drive of the carriage transport motor 121 to move the carriage 7 to the forward path start position of the drawing area. Here, the drawing area is an area where the locus drawn along the Y direction by the work table 25 shown in FIG. 1 and the locus drawn along the X direction by the ejection head 33 overlap. The forward path start position is a position where the forward path when the carriage 7 is reciprocated is started. In the present embodiment, the forward path start position is located between the maintenance device 11 and the work table 25 in the X direction. The forward path start position is located outside the work table 25 in plan view.
Next, in step S2, the CPU 113 outputs a workpiece conveyance command to the motor control unit 141 (FIG. 5). At this time, the motor control unit 141 controls the drive of the work transport motor 123 to move the work W to the drawing area.

Next, in step S3, the CPU 113 outputs a carriage scanning command to the motor control unit 141 (FIG. 5). At this time, the motor control unit 141 controls the drive of the carriage transport motor 121 to start the reciprocation of the carriage 7.
Here, in the reciprocating movement of the carriage 7, the carriage 7 reciprocates between the forward path start position and the backward path start position described above. That is, the path that returns from the forward path start position to the forward path start position and returns to the forward path start position is one round trip of the carriage 7. For this reason, in this embodiment, the path from the forward path start position to the return path start position is the forward path of the carriage 7. On the other hand, the path from the return path start position to the forward path start position is the return path of the carriage 7.
The return path start position is a position facing the forward path start position with the work table 25 (FIG. 1) sandwiched in the X direction. The return path start position is located outside the work table 25 in plan view. For this reason, the forward path start position and the backward path start position are opposed to each other with the work table 25 sandwiched in the X direction in plan view.
Next, in step S4, the CPU 113 outputs an irradiation command for the irradiation device 15a to the irradiation controller 147 (FIG. 5). At this time, the irradiation control unit 147 controls the driving of the light source 43 of the irradiation device 15a to turn on the light source 43 of the irradiation device 15a.

Next, in step S5, the CPU 113 outputs a discharge command to the discharge control unit 145 (FIG. 5). At this time, the discharge controller 145 controls the drive of the discharge head 33 and discharges the droplet 55 from each nozzle 37 based on the drawing data. As a result, the forward drawing is performed.
Next, in step S6, the CPU 113 determines whether or not the position of the carriage 7 has reached the return path start position. At this time, if it is determined that the position of the carriage 7 has reached the return path start position (Yes), the process proceeds to step S7. On the other hand, if it is determined that the position of the carriage 7 has not reached the return path start position (No), the process waits until the position of the carriage 7 reaches the return path start position.

In step S7, the CPU 113 outputs a discharge stop command to the discharge control unit 145 (FIG. 5). At this time, the ejection control unit 145 stops driving the ejection head 33 and stops ejection of the droplet 55 from each nozzle 37. Thereby, the drawing in the forward path is completed.
Next, in step S8, the CPU 113 outputs a stop command for the irradiation device 15a to the irradiation control unit 147 (FIG. 5). At this time, the irradiation control unit 147 controls the driving of the light source 43 of the irradiation device 15a to turn off the light source 43 of the irradiation device 15a.
Next, in step S9, the CPU 113 determines whether there is superimposed data. The superimposition data is data indicating a new drawing pattern to be superimposed on the drawing pattern in the drawing on the outbound path that has just ended. At this time, if it is determined that there is superimposed data (Yes), the process proceeds to step S11. On the other hand, if it is determined that there is no superimposed data (No), the process proceeds to step S10.
In step S10, the CPU 113 outputs a line feed command to the motor control unit 141 (FIG. 5), and then shifts the process to step S11. At this time, the motor control unit 141 that has received the line feed command controls the drive of the work transport motor 123 to move the work W in the Y direction (line feed), and draws a new area in which the pattern should be drawn on the work W. Move to area.

In step S11, CPU113 outputs the irradiation command with respect to irradiation apparatus 15b to irradiation control part 147 (Drawing 5). At this time, the irradiation control unit 147 controls the driving of the light source 43 of the irradiation device 15b to turn on the light source 43 of the irradiation device 15b.
Next, in step S12, the CPU 113 outputs a discharge command to the discharge control unit 145 (FIG. 5). At this time, the discharge controller 145 controls the drive of the discharge head 33 and discharges the droplet 55 from each nozzle 37 based on the drawing data. As a result, drawing on the return path is performed.
Next, in step S13, the CPU 113 determines whether the position of the carriage 7 has reached the forward path start position. At this time, if it is determined that the position of the carriage 7 has reached the forward path start position (Yes), the process proceeds to step S14. On the other hand, if it is determined that the position of the carriage 7 has not reached the forward path start position (No), the process waits until the position of the carriage 7 reaches the forward path start position.

In step S14, the CPU 113 outputs a discharge stop command to the discharge control unit 145 (FIG. 5). At this time, the ejection control unit 145 stops driving the ejection head 33 and stops ejection of the droplet 55 from each nozzle 37. Thereby, drawing on the return path is completed.
Next, in step S15, the CPU 113 outputs a stop command for the irradiation device 15b to the irradiation control unit 147 (FIG. 5). At this time, the irradiation control unit 147 controls the driving of the light source 43 of the irradiation device 15b to turn off the light source 43 of the irradiation device 15b.
Next, in step S16, the CPU 113 determines whether there is superimposed data. The superimposition data is data indicating a new drawing pattern to be superimposed on the drawing pattern in the drawing on the return path that has just ended. At this time, if it is determined that there is superimposed data (Yes), the process proceeds to step S4. On the other hand, if it is determined that there is no superimposed data (No), the process proceeds to step S17.

In step S17, the CPU 113 outputs a line feed command to the motor control unit 141 (FIG. 5), and then shifts the process to step S18. At this time, the motor control unit 141 that has received the line feed command controls the drive of the work transport motor 123 to move the work W in the Y direction (line feed), and draws a new area in which the pattern should be drawn on the work W. Move to area.
In step S18, the CPU 113 determines whether or not the drawing data has been completed. At this time, if it is determined that the drawing data has ended (Yes), the processing ends. On the other hand, if it is determined that the drawing data has not ended (No), the process proceeds to step S4.

(Example)
A result of creating an image with an image paint containing acrylic resin using the above-described droplet discharge device 1 will be described.
Here, the recording method in the present embodiment will be described.
As shown in FIG. 7, the recording method according to the present embodiment includes a drawing pattern forming step S21 and a drawing pattern curing step S22.
In the drawing pattern forming step S21, an image pattern (hereinafter referred to as a drawing pattern) is formed on the workpiece W based on the above-described drawing processing (FIG. 6).
In the drawing pattern curing step S22 after the drawing pattern forming step S21, the film constituting the drawing pattern is cured. In the present embodiment, a method of irradiating the film constituting the drawing pattern with ultraviolet light using an exposure apparatus different from the droplet discharge apparatus 1 is employed.

In the present embodiment, in the drawing pattern forming step S21, four drawing patterns 161 are superimposed as shown in FIG. In the following description, when the four drawing patterns 161 are identified, the four drawing patterns 161 are represented as a drawing pattern 161a, a drawing pattern 161b, a drawing pattern 161c, and a drawing pattern 161d, respectively.
When the second drawing pattern 161b is superimposed on the first drawing pattern 161a, the second drawing pattern 161b is formed on a part of the first drawing pattern 161a as shown in FIG. Superimpose. At this time, the ultraviolet light 41 has already been applied to the paint 163 constituting the first drawing pattern 161a. Hereinafter, the paint 163 that has been irradiated with the ultraviolet light 41 is referred to as an irradiated paint 163a.

When the third drawing pattern 161c is superimposed on the second drawing pattern 161b, the third drawing pattern 161c is part of the second drawing pattern 161b as shown in FIG. 9B. Superimpose. At this time, the ultraviolet light 41 is already applied to the paint 163 constituting the second drawing pattern 161b. That is, the coating material 163 constituting the third drawing pattern 161c is applied so as to overlap the irradiated coating material 163a.
Similarly, when the fourth drawing pattern 161d is superimposed on the third drawing pattern 161c, the fourth drawing pattern 161d is the same as the third drawing pattern 161c as shown in FIG. 9C. Superimpose on part. At this time, the ultraviolet light 41 has already been applied to the paint 163 constituting the third drawing pattern 161c. That is, the paint 163 constituting the fourth drawing pattern 161d is applied so as to overlap the irradiated paint 163a.

Example 1
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 5%. Here, the polymerization rate is the rate of polymerization in the reaction site of the drawing pattern. The polymerization rate was measured by an ATR (Attenuated Total Reflection) method using FT-IR (Fourier Transform Infrared Spectroscopy).
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Example 2)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 20%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Example 3)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 35%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 1)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 3%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 2)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 40%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 3)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed with the functional liquid 53W.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 50%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.
The results of evaluating the image quality of Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 1 below.

In the evaluation results of image quality in Table 1, “◯” indicates that uniform and high image quality was obtained. The evaluation result “Δ” indicates that the image quality is inferior to “◯”. The evaluation result “×” indicates that the image quality is inferior to “Δ”. Regarding the evaluation results “Δ” and “×”, the reason for determination is described in the table.
From the results shown in Table 1, when the polymerization rate of the irradiated paint 163a is 40% or more (Comparative Example 2 and Comparative Example 3) immediately before the paint 163 is applied to the irradiated paint 163a, streaks are likely to occur in the image. Become. Therefore, it is understood that a high image quality can be obtained by setting the polymerization rate of the irradiated paint 163a immediately before the coating 163 is applied to the irradiated paint 163a to be less than 40%.
On the other hand, when the polymerization rate of the irradiated paint 163a immediately before the paint 163 is applied to the irradiated paint 163a is less than 5% (Comparative Example 1), the fluidity of the paint is high and it is difficult to fix the paint. Become. Therefore, when the color of the paint 163 is a single color (white in this example), the polymerization rate of the irradiated paint 163a immediately before the paint 163 is applied to the irradiated paint 163a is set to 5% or higher. It is understood that image quality can be obtained.

Example 4
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 20%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Example 5)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 35%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 4)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 3%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 5)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 5%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 6)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 40%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.

(Comparative Example 7)
In the drawing pattern forming step S21, the four drawing patterns 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d were formed using the functional liquid 53Y, the functional liquid 53M, the functional liquid 53C, and the functional liquid 53K. In this embodiment, the drawing pattern 161a is formed with the functional liquid 53Y, the drawing pattern 161b is formed with the functional liquid 53M, the drawing pattern 161c is formed with the functional liquid 53C, and the drawing pattern 161d is formed with the functional liquid 53K.
At this time, the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 on the irradiated paint 163a was set to 50%. The measurement of the polymerization rate is in accordance with Example 1.
Next, in the drawing pattern curing step S22, each of the drawing pattern 161a, the drawing pattern 161b, the drawing pattern 161c, and the drawing pattern 161d was cured.
The results of evaluating the image quality of Examples 4 and 5 and Comparative Examples 4 to 7 are shown in Table 2 below.

In the evaluation results of image quality in Table 2, “◯” indicates that uniform and high image quality was obtained. The evaluation result “Δ” indicates that the image quality is inferior to “◯”. The evaluation result “×” indicates that the image quality is inferior to “Δ”. Regarding the evaluation results “Δ” and “×”, the reason for determination is described in the table.
From the results shown in Table 2, when the polymerization rate of the irradiated paint 163a is 40% or more (Comparative Example 6 and Comparative Example 7) immediately before the paint 163 is applied to the irradiated paint 163a, streaks are likely to occur in the image. Become. Therefore, it is understood that a high image quality can be obtained by setting the polymerization rate of the irradiated paint 163a immediately before the coating 163 is applied to the irradiated paint 163a to be less than 40%.

On the other hand, if the polymerization rate of the irradiated paint 163a immediately before coating the applied paint 163 over the irradiated paint 163a is less than 5% (Comparative Example 4), the fluidity of the paint is high and it is difficult to fix the paint. Become. Therefore, it is understood that a high image quality can be obtained by setting the polymerization rate of the irradiated paint 163a immediately before the coating 163 is applied to the irradiated paint 163a to 5% or more.
Here, in a plurality of paints 163 having different colors (four kinds of paints 163 in this example), the polymerization rate of the paint 163a to be irradiated immediately before the paint 163 is applied on the paint 163a to be irradiated is 5%. (Comparative Example 5), color mixing occurred between the plurality of coating materials 163. For this reason, in the case of a plurality of paints 163 having different colors, high image quality can be obtained by setting the polymerization rate of the paint 163a to be irradiated to 20% or more immediately before the paint 163 is applied to the paint 163a. It is understood that

In the present embodiment, the work W corresponds to a recording medium. Further, in the drawing process of the drawing pattern forming process S21, the processes in steps S5 and S12 correspond to the coating process, the processes in steps S4 and S11 correspond to the light irradiation process, and the processes in steps S9 and S16 are superimposed. It corresponds to the coating process.
In the present embodiment, an ink jet method, which is one of the application methods, is employed as a method of applying the functional liquid 53 in the drawing pattern forming step S21. However, the coating method is not limited to the inkjet method, and a dispensing method, a printing method, or the like can also be employed. However, it is preferable to employ the ink jet method in that an arbitrary amount of the functional liquid 53 can be easily applied to an arbitrary portion of the workpiece W.
In this embodiment, five types of image paints of yellow, magenta, cyan, black, and white are employed. However, the color of the image paint is not limited to these five types. As the color of the image paint, for example, one kind or more of any kind of image paint such as seven kinds obtained by adding light cyan or light magenta to these five kinds may be employed.

  DESCRIPTION OF SYMBOLS 1 ... Droplet discharge device, 13 ... Head unit, 15 ... Irradiation device, 15a, 15b ... Irradiation device, 31 ... Head plate, 33 ... Discharge head, 35 ... Nozzle surface, 37 ... Nozzle, 39, 39a, 39b, 39c , 39d, 39e, 39f, 39g, 39h ... nozzle row, 41 ... ultraviolet light, 43 ... light source, 53, 53Y, 53M, 53C, 53K, 53W ... functional liquid, 55 ... droplet, 161, 161a, 161b, 161c , 161d: Drawing pattern, 163: Paint, 163a: Irradiated paint, W: Workpiece.

Claims (5)

An application step of applying a photo-curing coating to the recording medium, which is a property that curing is accelerated by light irradiation;
A light irradiation step of irradiating the paint on the recording medium with the light after the coating step;
A superposition application step of applying a new paint on the irradiated paint, which is the paint that has been irradiated with the light,
In the light irradiation step, the curing rate in the irradiated paint is less than 40%.
And a recording method. When the new paint and the irradiated paint are the same type of color, in the light irradiation step, the curing rate in the irradiated paint is set to 5% or more.
The recording method according to claim 1, wherein: When the new paint and the irradiated paint are different types of colors, in the light irradiation step, the curing rate in the irradiated paint is set to 20% or more.
The recording method according to claim 1, wherein: In the application step, the paint is applied to the recording medium by ejecting the paint onto the recording medium by an inkjet method.
The recording method according to claim 1, wherein the recording method is a recording medium. In the superimposing application step, the new paint is applied to the paint in an overlapping manner by discharging the new paint by an inkjet method.
The recording method according to claim 1, wherein the recording method is a recording medium.

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