JP2018079607A - Gravure printing machine, gravure printing system, and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gravure printing machine which can reduce ink mist adhering to an unprocessed print sheet.SOLUTION: A gravure printing machine 1 according to the invention includes: a rotary plate cylinder 3; an ink supply device 5 which supplies an ink 4 to the plate cylinder 3; and a doctor 6 which is provided extending in an axial direction of the plate cylinder 3 and contacts with a surface of the plate cylinder 3 to remove the excessive ink 4 adhering to the plate cylinder 3. The gravure printing machine 1 includes: an impression cylinder 7 which is rotatably provided and presses an unprocessed print sheet 2 to the plate cylinder 3; and a humidifier 30 provided in at least one of the upstream side and the downstream side of a contact part 11 where the ink 4 adhering to the plate cylinder 3 and the unprocessed print sheet 2 contact. The humidifier 30 supplies moisture to at least one of the unprocessed print sheet 2 and the ink 4 in the contact part 11.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gravure printing machine, a gravure printing system, and a printing method.

  Conventionally, in the field of gravure printing, as shown in FIG. 5, when the printing original fabric 100 is separated from the ink 102 at the contact portion 103 where the printing original fabric 100 and the ink 102 attached to the plate cylinder 101 come into contact with each other, A part of the ink 102 is repelled, and droplets of the mist-like ink 102 (hereinafter referred to as ink mist 104) are generated. In addition, it is known that the printing original fabric 100 and the ink mist 104 are charged when the printing original fabric 100 leaves the ink 102. When the printing original fabric 100 and the ink mist 104 are charged, the ink mist 104 is attracted to the printing original fabric 100, adheres to an unintended place of the printing original fabric 100, and there is a possibility that the color tone reproducibility is deteriorated. In addition, in an ink ribbon used in a color printer such as a sublimation type thermal transfer system, a solid print portion is sequentially arranged in each color as a rectangular pattern, and a large amount of ink mist is printed on a solid print portion of a different color. If adhered, the color tone reproducibility may be significantly deteriorated. Furthermore, ink mist is more likely to be generated at higher printing speeds, which is a problem in improving productivity.

  In Patent Document 1, an electric charge having the same polarity as that of ink mist generated during printing is charged to a conductive belt by a charging means, and the printing substrate and the conductive belt are conveyed in contact with each other. As a result, a charge having the same polarity as the ink mist is charged on the printing substrate, and the ink mist is prevented from adhering to the printing substrate. However, when the printing substrate is charged with the same polarity as the ink mist, the ink attached to the printing substrate may have a different charge from the printing substrate. In this case, the printed portion of the printing substrate that has ink attached and the non-printed portion to which ink does not adhere have different charges. For this reason, there exists a possibility that ink mist may adhere to a printing part or a non-printing part.

JP 2014-172306 A

  The present invention has been made in consideration of such points, and an object of the present invention is to provide a gravure printing machine, a gravure printing system, and a printing method that can reduce the adhesion of ink mist to a printing material.

  The present invention is provided with a rotatable plate cylinder, an ink supply device for supplying ink to the plate cylinder, and an axially extending direction of the plate cylinder so as to contact the surface of the plate cylinder. A doctor that removes the excess ink adhering to the cylinder, a pressure cylinder that is rotatably provided and presses the printing stock against the plate cylinder, and the ink that adheres to the printing cylinder and the printing original fabric contact each other A humidifying device provided on at least one of the upstream side and the downstream side of the contact portion, and the humidifying device supplies moisture to at least one of the printing material and the ink at the contact portion. Is a gravure printing machine.

  The present invention is the gravure printing machine, wherein the humidifier is provided on both the upstream side and the downstream side of the contact portion.

  The present invention is characterized in that the tip of the humidifier is provided within 50 cm from the intersection of the straight line connecting the center of the plate cylinder and the center of the impression cylinder and the printing raw material in a side view. It is a gravure printing machine.

  The present invention is the gravure printing machine, wherein the humidifier extends over the entire length of the plate cylinder in the axial direction.

  The present invention is the gravure printing machine, wherein the humidifying device supplies the moisture to at least one of the printing original fabric and the ink by generating mist by ultrasonic waves.

  The present invention is the gravure printing machine, wherein the average particle diameter of the mist is 1 μm or less.

  The present invention provides a gravure printing machine according to the present invention, a humidity sensor that is provided between the humidifying device and the contact portion, is connected to the humidifying device and the humidity sensor, and controls the humidifying device. A gravure printing system, wherein the humidifying device is driven when the humidity value measured by the humidity sensor is equal to or lower than a predetermined value.

  The present invention is the gravure printing system, wherein the control device does not drive the humidifier when the humidity value measured by the humidity sensor is higher than the predetermined value.

  The present invention provides a printing method using a gravure printing machine according to the present invention, wherein the water is supplied to at least one of the printing material and the ink using the step of printing on the printing material and the humidifier. A printing method comprising the steps of:

  In the present invention, a humidity sensor that measures humidity is provided between the humidifying device and the contact portion, and in the step of printing on the printing material, a humidity value measured by the humidity sensor is equal to or less than a predetermined value. In the case of the printing method, the humidifying device is driven.

  The present invention is the printing method characterized in that, in the step of printing on the printing material, the humidifying device is not driven when the humidity value measured by the humidity sensor is higher than the predetermined value.

  According to the present invention, the humidifying device supplies moisture to at least one of the printing original fabric and the ink at the contact portion. Therefore, when the printing original fabric passes through the contact portion, the electric charge can be released from the charged printing original fabric and the ink mist. Thereby, it can suppress that ink mist is attracted to the printing original fabric by static electricity, and can reduce that ink mist adheres to the printing original fabric.

FIG. 1 is a schematic configuration diagram showing a gravure printing machine according to an embodiment of the present invention. FIG. 2 is a partially enlarged view showing a gravure printing machine according to an embodiment of the present invention. FIG. 3 is a perspective view of the gravure printing machine according to the embodiment of the present invention as seen from the upstream side. FIG. 4 is a perspective view of the gravure printing machine according to the embodiment of the present invention as seen from the downstream side. FIG. 5 is a partially enlarged view showing a contact portion of a conventional gravure printing machine.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are diagrams showing an embodiment of a gravure printing machine, a gravure printing system, and a printing method according to the present invention. Among these, FIG. 1 is a schematic block diagram showing a gravure printing machine.

  First, a gravure printing machine will be described with reference to FIG.

  As shown in FIG. 1, the gravure printing machine 1 according to the present embodiment includes a plurality of, for example, three printing units 20 a, 20 b, and 20 c that perform printing of different colors on the printing original fabric 2. In this case, the first printing unit 20a is a first color printing unit, the second printing unit 20b is a second color printing unit, and the third printing unit 20c is a third color printing unit. In each printing unit 20a, 20b, 20c, the printing original fabric 2 passes between a plate cylinder 3 described later and an impression cylinder 7 described later, so that printing is performed on the printing original fabric 2. Yes. Hereinafter, the first, second, and third printing units 20a, 20b, and 20c are collectively referred to as a printing unit 20.

  Next, the printing unit 20 will be described in more detail with reference to FIGS.

  As shown in FIG. 2, the printing unit 20 adheres to the plate cylinder 3 by contacting the surface of the plate cylinder 3, the ink cylinder 5 that supplies the ink 4 to the plate cylinder 3, and the surface of the plate cylinder 3. A doctor 6 that removes the excess ink 4 and a pressure cylinder 7 that presses the printing original fabric 2 against the plate cylinder 3. In addition, the printing unit 20 includes a humidifier 30 that supplies moisture to the printing raw fabric 2 and the ink 4 at the contact portion 11 described later. Among these, the plate cylinder 3 is configured to rotate clockwise in FIG. In FIG. 2, the plate cylinder 3, the printing original fabric 2, and the impression cylinder 7 are shown separately from each other for the sake of clarity.

  The ink supply device 5 is disposed in contact with the plate cylinder 3 and supplies the ink 4 to a rotatable finisher roll 8 and a contact portion where the plate cylinder 3 and the finisher roll 8 are in contact with each other. An ink supply path 9 and a pool pan 10 provided below the plate cylinder 3 and the finisher roll 8. Among these, the finisher roll 8 is configured to rotate counterclockwise in FIG. The finisher roll 8 plays a role of uniformly adhering the ink 4 from the ink supply path 9 to the plate cylinder 3. The ink supply device 5 may not have the finisher roll 8. In this case, the ink supply path 9 supplies the ink 4 to the pool pan 10, and the ink 4 is supplied to the plate cylinder 3 by the plate cylinder 3 coming into contact with the ink 4 stored in the pool pan 10.

  The pool pan 10 extends in the axial direction of the plate cylinder 3 and is disposed so as to cover the side (left and right sides in FIG. 2) and the lower side of the plate cylinder 3 and the finisher roll 8. The pool pan 10 is configured to receive and store the ink 4 flowing down from the plate cylinder 3 and the finisher roll 8 and the ink 4 scraped off from the plate cylinder 3 by the doctor 6.

  As shown in FIGS. 2 to 4, the doctor 6 is provided on the opposite side of the finisher roll 8 with respect to the plate cylinder 3. The doctor 6 is provided on the upstream side of the contact portion 11 formed between the plate cylinder 3 and the impression cylinder 7, and extends in the axial direction of the plate cylinder 3. The doctor 6 can swing around an axis parallel to the axis of the plate cylinder 3, and the doctor 6 swings to suppress the generation of streaks in the printing stock 2. Yes.

  The impression cylinder 7 is provided above the plate cylinder 3 and is rotatably provided. The impression cylinder 7 is configured to rotate counterclockwise in FIG. As shown in FIG. 2, the contact portion 11 described above is formed between the impression cylinder 7 and the plate cylinder 3, and the ink 4 attached to the plate cylinder 3 and printing are formed in the contact portion 11. The fabric 2 comes into contact. In this contact portion 11, the printing original fabric 2 passes between the plate cylinder 3 to which the ink 4 is adhered and the impression cylinder 7 that presses the printing original fabric 2 against the plate cylinder 3 while rotating. Thereby, the ink 4 is transferred to the printing original fabric 2, and printing is performed on the printing original fabric 2. The “contact portion” is a region having a certain area including a region where the ink 4 and the printing original fabric 2 are in contact with each other. For example, in FIG. 2, a region surrounded by a virtual line (two-dot chain line), the printing original fabric 2 and the plate cylinder 3 corresponds to the contact portion 11.

  Next, the humidifier 30 will be described in more detail with reference to FIGS.

  As shown in FIG. 2, the humidifier 30 includes a mist generating unit 32 that generates mist (vapor) 31 from a liquid, a duct 33 that is connected to the mist generating unit 32, and through which the generated mist 31 passes, And a blowing part 34 that is attached to the tip and sprays the mist 31 that has passed through the duct 33 in the vicinity of the contact part 11. In such a configuration, the mist 31 is sprayed from the blowing part 34 to create a high humidity atmosphere in the vicinity of the contact part 11, whereby moisture is supplied to the printing stock 2 and the ink 4 at the contact part 11. The mist 31 may be made of water or a liquid containing a certain amount of water, for example, water containing ethanol added to water.

  The mist generator 32 is an ultrasonic mist generator that generates the mist 31 using ultrasonic waves. That is, the mist generating unit 32 includes an ultrasonic vibrator (not shown), and the ultrasonic vibrator vibrates ultrasonically in a state where the ultrasonic vibrator is immersed in the liquid, thereby generating the mist 31 from the liquid. Moreover, it is preferable that the average particle diameter of the mist 31 generated by the mist generating unit 32 is 1 μm or less. Thereby, the floating time of the sprayed mist 31 can be lengthened, and a high humidity atmosphere can be effectively created in the vicinity of the contact portion 11. In the present embodiment, the mist generating unit 32 is an ultrasonic mist generating device, but is not limited to this, and is a steam type (heating type), a vaporizing type, or a mist generating device combining these. There may be.

  As shown in FIGS. 2 to 4, the blowing part 34 is provided on both the upstream side and the downstream side of the contact part 11. As shown in FIG. 2, the front-end | tip part 35 of each blowing part 34 is provided with the blower outlet, and it is comprised so that the mist 31 may be sprayed from a blower outlet. Further, the tip portion 35 of the blow-out portion 34 is provided within 50 cm from the intersection P1 between the straight line L connecting the center O1 of the plate cylinder 3 and the center O2 of the impression cylinder 7 and the printing original fabric 2 in a side view. It is preferable that Thereby, the humidity near the contact portion 11 can be effectively increased.

  Further, as shown in FIGS. 3 and 4, the blowing portion 34 extends over the entire length of the plate cylinder 3 in the axial direction. That is, the blow-out portion 34 has the same length as the axial direction of the plate cylinder 3 or a length longer than that. Thus, moisture can be supplied to the printing original fabric 2 and the ink 4 in the entire width direction of the printing original fabric 2. In addition, if the blowing part 34 provided in the upstream side can supply a water | moisture content to the printing original fabric 2 and the ink 4 which pass the contact part 11, it will spray the mist 31 directly on the printing original fabric 2 and the ink 4. Also good. Even in this case, charges can be released from the printing original fabric 2 and the ink mist. Moreover, if the blowing part 34 provided in the downstream side can release an electric charge from the printing original fabric 2 and ink mist, for example, the location P2 where the printing original fabric 2 is separated from the ink 4 in the contact portion 11 (see FIG. 2). ), The mist 31 may be sprayed directly on the printing original fabric 2 and the ink 4.

  Next, the gravure printing system including the humidifier 30 will be described with reference to FIGS.

  As shown in FIGS. 2 to 4, the gravure printing system 50 is provided between the above-described gravure printing machine 1, the blowing unit 34, and the contact unit 11, and a humidity sensor that measures humidity near the contact unit 11. 51, and a control device 52 that is connected to the humidifying device 30 and the humidity sensor 51 and controls the humidifying device 30. Among these, the humidity sensor 51 is attached to the blowing part 34. In addition, a measurement unit 53 that measures humidity is provided at the tip of the humidity sensor 51. The measurement unit 53 is positioned between the blowing unit 34 and the contact unit 11. The humidity sensor 51 can be installed at any location as long as the humidity in the vicinity of the contact portion 11 can be measured. Further, the humidity measured by the humidity sensor 51 is configured to be transmitted as a signal to the control device 52.

  The control device 52 drives the humidifier 30 when the humidity value measured by the humidity sensor 51 is equal to or less than a predetermined value. That is, when the humidity value is equal to or lower than the predetermined value, the humidifier 30 is driven, the mist 31 is supplied in the vicinity of the contact portion 11, and a high humidity atmosphere is created in the vicinity of the contact portion 11. Here, the predetermined value is a reference value (threshold value) for determining whether or not the humidifier 30 should be driven. Such a predetermined value can be arbitrarily set according to the environment, but when the printing original fabric 2 passes through the contact portion 11, the electric charge is released from the printing original fabric 2 and the ink mist which are charged. In addition, it is preferable to set the humidity value in the vicinity of the contact portion 11 so as to suppress the occurrence of dew condensation. For example, the humidity value may be 60% RH or more and 80% RH or less.

  On the other hand, the control device 52 does not drive the humidifier 30 when the humidity value measured by the humidity sensor 51 is higher than a predetermined value. That is, when the humidity value becomes higher than a predetermined value by driving the humidifier 30, the humidifier 30 is stopped and the mist 31 is not supplied near the contact portion 11. In addition, when the humidifier 30 is stopped, the control device 52 continues to stop the humidifier 30 until the humidity value becomes lower than a predetermined value. In this way, it is preferable to maintain the humidity in the vicinity of the contact portion 11 at around 70% RH.

  Next, the operation in the present embodiment having such a configuration will be described. Here, a printing method using the gravure printing system shown in FIGS. 2 to 4 will be described.

  First, the printing original fabric 2 is supplied to the gravure printing machine 1. The supplied printing original fabric 2 is conveyed to each printing unit 20a, 20b, 20c (see FIG. 1), and printing is performed on the printing original fabric 2. That is, the first printing unit 20a prints the first color printing pattern on the transported printing original fabric 2, the second printing unit 20b prints the second color printing pattern, and the third printing. A third color printing pattern is printed in the unit 20c.

  At this time, the humidifying device 30 is provided on the upstream side and the downstream side of the contact portion 11, and in the process of printing on the printing original fabric 2, the humidity near the contact portion 11 is measured by the humidity sensor 51. Is done. The humidity value measured by the humidity sensor 51 is transmitted to the control device 52 as a signal.

  When a signal is transmitted to the control device 52, the control device 52 determines whether or not the humidity value measured by the humidity sensor 51 is equal to or less than a predetermined value. When the control device 52 determines that the humidity value is equal to or lower than the predetermined value, the control device 52 drives the humidifier 30. On the other hand, when the control device 52 determines that the humidity value is higher than the predetermined value, the control device 52 does not drive the humidifier 30.

  When the printing original fabric 2 passes through the contact portion 11, when the control device 52 determines that the humidity value measured by the humidity sensor 51 is lower than a predetermined lower limit value, the humidifying device 30 is driven and the blowing portion Mist 31 is sprayed from the tip portion 35 of 34. This creates a high humidity atmosphere in the vicinity of the contact portion 11. For this reason, moisture is supplied to the printing original fabric 2 and the ink 4. At this time, the charges generated in the printing original fabric 2 and the ink 4 (ink mist) flow in the supplied moisture. As a result, when the printing original fabric 2 passes through the contact portion 11, the electric charge can be released from the printing original fabric 2 and the ink mist charged. On the other hand, when the control device 52 determines that the humidity value is higher than the predetermined upper limit value, the humidifying device 30 is not driven because a sufficiently high humidity atmosphere is created in the vicinity of the contact portion 11. This can avoid driving the humidifier 30 more than necessary. For this reason, while suppressing spending excess energy, generation | occurrence | production of dew condensation can be suppressed in the vicinity of the contact part 11. FIG.

  As described above, according to the present embodiment, moisture is supplied to the printing original fabric 2 and the ink 4 by the humidifier 30 in the contact portion 11. Thereby, when the printing original fabric 2 passes through the contact portion 11, electric charges can be released from the printing original fabric 2 and the ink 4 (ink mist) which are charged. For this reason, it can suppress that ink mist is attracted to the printing original fabric 2 by static electricity. As a result, it is possible to suppress adhesion of ink mist to the printing original fabric 2.

  Further, according to the present embodiment, the humidifier 30 extends over the entire length of the plate cylinder 3 in the axial direction. Thus, moisture can be supplied to the printing original fabric 2 and the ink 4 in the entire width direction of the printing original fabric 2. For this reason, when the printing original fabric 2 passes through the contact portion 11, it is possible to effectively release the charge from the printing original fabric 2 and the ink mist charged.

  Moreover, according to this Embodiment, the humidification apparatus 30 generates the mist 31 with an ultrasonic wave. As a result, the particle size of the generated mist 31 can be reduced. For this reason, aggregation of mist 31 can be suppressed and the floating time of mist 31 can be lengthened. As a result, it is possible to suppress the occurrence of dew condensation due to the mist 31 and to effectively contain moisture in the printing original fabric 2 and the ink 4.

  Further, according to the present embodiment, the control device 52 determines whether or not the humidity value measured by the humidity sensor 51 is equal to or less than a predetermined value. When the control device 52 determines that the humidity value measured by the humidity sensor 51 is equal to or less than a predetermined value, the humidifier 30 is driven. As a result, a high humidity atmosphere is created in the vicinity of the contact portion 11, and moisture is supplied to the printing original fabric 2 and the ink 4. For this reason, when the printing original fabric 2 passes through the contact portion 11, the electric charge can be released from the printing original fabric 2 and the ink mist which are charged.

  Further, according to the present embodiment, the control device 52 determines whether or not the humidity value measured by the humidity sensor 51 is higher than a predetermined value. And when the control apparatus 52 judges that the said humidity value is higher than a predetermined value, since sufficient high humidity atmosphere is produced in the vicinity of the contact part 11, the humidification apparatus 30 is not driven. This can avoid driving the humidifier 30 more than necessary. For this reason, it can suppress spending excess energy. As a result, energy saving can be achieved. Moreover, it can suppress that humidity becomes higher than necessary, and can suppress the generation | occurrence | production of dew condensation in the vicinity of the contact part 11. FIG.

  In addition, in this Embodiment mentioned above, the example in which the humidification apparatus 30 was provided in the upstream and downstream of the contact part 11 was demonstrated. However, it is not restricted to this, For example, the humidification apparatus 30 should just be provided in any one of the upstream of the contact part 11, or a downstream. Even in this case, the charge can be released from the charged printing original fabric 2 and the ink mist, and the ink mist can be prevented from being attracted to the printing original fabric 2 by static electricity.

  Moreover, in this Embodiment mentioned above, the humidification apparatus 30 demonstrated the example which supplies a water | moisture content to the printing raw fabric 2 and the ink 4 in the contact part 11. FIG. However, the present invention is not limited to this. For example, the humidifier 30 may supply moisture to either the printing raw fabric 2 or the ink 4. Also in this case, the charge can be released from either the printing original fabric 2 or the ink mist having a charge, and the ink mist can be prevented from being attracted to the printing original fabric 2 by static electricity.

  In the present embodiment described above, the control device 52 determines whether or not the humidity value measured by the humidity sensor 51 is equal to or less than a predetermined value, and the control device 52 determines that the humidity value is equal to or less than the predetermined value. The example in which the control device 52 drives the humidifier 30 has been described. Further, when the control device 52 determines whether or not the humidity value measured by the humidity sensor 51 is higher than a predetermined value, and the control device 52 determines that the humidity value is higher than the predetermined value, the control device 52 An example in which the humidifier 30 is not driven has been described. However, the present invention is not limited to this. For example, when printing is performed on the original sheet 2, the humidifier 30 may be continuously driven, or the humidifier 30 may be controlled manually.

  The present invention is not limited to the above-described embodiments and modifications as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments and modifications. You may delete some components from all the components shown by embodiment and a modification. Furthermore, constituent elements over different embodiments and modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Gravure printing machine 2 Original printing material 3 Plate cylinder 4 Ink 5 Ink supply apparatus 6 Doctor 7 Pressure cylinder 11 Contact part 30 Humidifier 31 Mist 35 Tip part 50 Gravure printing system 51 Humidity sensor 52 Control apparatus O1 Center of printing cylinder O2 Pressure Center of trunk L Straight line P1 Intersection

Claims (11)

A rotatable plate cylinder,
An ink supply device for supplying ink to the plate cylinder;
A doctor that extends in the axial direction of the plate cylinder and removes excess ink adhering to the plate cylinder by contacting the surface of the plate cylinder;
An impression cylinder that is rotatably provided and presses the printing stock against the plate cylinder;
A humidifying device provided on at least one of the upstream side or the downstream side of the contact portion where the ink attached to the plate cylinder and the printing original fabric contact,
The said humidifier supplies a water | moisture content to at least one of the said printing raw fabric and the said ink in the said contact part, The gravure printing machine characterized by the above-mentioned.   The gravure printing machine according to claim 1, wherein the humidifier is provided on both the upstream side and the downstream side of the contact portion.   The front end of the humidifier is provided within 50 cm from the intersection of a straight line connecting the center of the plate cylinder and the center of the impression cylinder in a side view and the printing original fabric. The gravure printing machine according to 1 or 2.   The gravure printing machine according to any one of claims 1 to 3, wherein the humidifying device extends over the entire length of the plate cylinder in the axial direction.   The said humidifying device supplies the said water | moisture content to at least one of the said printing original fabric and the said ink by generating mist with an ultrasonic wave, The Claim 1 thru | or 4 characterized by the above-mentioned. Gravure printing machine.   The gravure printing machine according to claim 5, wherein an average particle diameter of the mist is 1 μm or less. A gravure printing machine according to any one of claims 1 to 6,
A humidity sensor that is provided between the humidifier and the contact portion and measures humidity;
A controller that is connected to the humidifier and the humidity sensor and controls the humidifier;
The said control apparatus drives the said humidification apparatus, when the humidity value measured by the said humidity sensor is below a predetermined value, The gravure printing system characterized by the above-mentioned.   The gravure printing system according to claim 7, wherein the controller does not drive the humidifier when the humidity value measured by the humidity sensor is higher than the predetermined value. In the printing method using the gravure printing machine as described in any one of Claims 1 thru | or 6,
Printing on the printing stock; and
And a step of supplying moisture to at least one of the original printing material and the ink using the humidifier. Between the humidifier and the contact portion, a humidity sensor for measuring humidity is provided,
10. The printing method according to claim 9, wherein, in the step of printing on the printing original fabric, when the humidity value measured by the humidity sensor is equal to or less than a predetermined value, the humidifier is driven.   11. The printing method according to claim 10, wherein in the step of printing on the printing original fabric, the humidifier is not driven when the humidity value measured by the humidity sensor is higher than the predetermined value.

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