Printed matter and printing method

Abstract

To provide printed matter and a printing method that allow the lightness to vary depending on the viewing directions.SOLUTION: The printed matter comprises: a substrate 100; an image layer 200 formed on the substrate 100 using colored ink; and a line pattern formed on the image layer 200 with transparent ink 320 and consisting of multiple non-intersecting fine lines 310. The image layer 200 has a brightness of L*≤70 in the L*a*b* color space. The width W1 of each fine line 310 in the direction in which the fine lines 310 neighbor each other is less than 45 times the thickness W2 of the thickest part of the fine lines 310.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a printed matter and a printing method. [Background technology]

[0002] Patent Document 1 discloses a printed matter configuration in which a transparent layer made of transparent ink is formed on the surface of a base layer on which characters, designs, etc. are printed, so that the glossiness of the transparent layer changes subtly depending on the observation angle, i.e., the printed matter is given a luxurious feel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-110782 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the configuration of Patent Document 1 makes use of the transparency of the transparent ink to allow the undercoat layer to be clearly visible, so there is a problem in that the design based on the transparent ink is poor. In other words, printed matter with higher design quality is required. [Means for solving the problem]

[0005] The printed matter has a substrate, an image layer formed on the substrate using colored inks, and a series of multiple non-intersecting thin lines formed on the image layer using transparent ink, wherein the image layer has a brightness of L*≦70 in the L*a*b* color system, and the width of the thin lines in the direction in which the multiple thin lines are adjacent to each other is less than 45 times the thickness of the thickest part of the thin lines.

[0006] The printing method includes a step of forming an image layer on a substrate using colored inks, and a step of forming a line pattern including a plurality of non-intersecting thin lines on the image layer using transparent ink, wherein the image layer has a brightness of L*≦70 in the L*a*b* color system, and the width of the thin lines in the direction in which the thin lines are adjacent to each other is less than 45 times the thickness of the thickest part of the thin lines. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a configuration of a printing apparatus. [Diagram 2] FIG. [Diagram 3] FIG. 3 is a diagram explaining how the printed matter in FIG. 2 will appear. [Figure 4] A cross-sectional view taken along line AA of the print shown in Figure 2. [Diagram 5] FIG. [Figure 6A] 5A and 5B are diagrams for explaining the relationship between the arrangement of transparent ink and a light source. [Figure 6B] 5A and 5B are diagrams for explaining the relationship between the arrangement of transparent ink and a light source. [Figure 7A] 5A and 5B are diagrams for explaining the relationship between the arrangement and angle of transparent ink. [Figure 7B] 5A and 5B are diagrams for explaining the relationship between the arrangement and angle of transparent ink. [Figure 8] 13 is a graph showing the number of people who judged the brightness of the image layer to be the upper limit of the effect of brightness change due to transparent ink in a sensory test. [Figure 9] 4 is a flowchart showing a printing method. [Figure 10] FIG. 11 is a plan view showing a configuration of a printed matter according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The configuration of a printing device 1 will be described with reference to FIG.

[0009] As shown in FIG. 1, the printing device 1 of this embodiment has a payout spindle 20 that pays out a substrate 100 such as printing paper, a transport section 30 that transports the substrate 100, a printing section 50 that prints on the substrate 100 transported by the transport section 30, a take-up spindle 40 that winds up the printed printed matter 1000, and a control section 10 that controls the operation of each section of the printing device 1.

[0010] In the printing device 1, a long substrate 100 (including a printed matter 1000) wound in a roll shape around a payout spindle 20 and a take-up spindle 40 is stretched along a transport path Pc. The substrate 100 is transported in a transport direction Ds by a rotating drum 35 provided between the payout spindle 20 and the take-up spindle 40, and an image is printed on the substrate 100.

[0011] The types of the substrate 100 are broadly classified into paper-based and film-based. Specific examples of the paper-based materials include fine paper, cast paper, art paper, coated paper, etc., while the film-based materials include synthetic paper, PET (Polyethylene terephthalate), PP (polypropylene), etc.

[0012] The printing device 1 is made up of three areas: a pay-out area 2 that pays out the substrate 100 from a pay-out spool 20, a process area 3 that records an image layer 200 (see FIGS. 4 and 5) on the substrate 100 paid out from the pay-out area 2, and a take-up area 4 that takes up the printed matter 1000, on which the image layer has been recorded in the process area 3, onto a take-up spool 40. In the following description, of the two sides of the substrate 100, the side on which the image layer 200 is recorded is referred to as the front side, and the opposite side is referred to as the back side.

[0013] The payout area 2 has a payout spindle 20 around which one end of the substrate 100 is wound, and a driven roller 21 around which the substrate 100 pulled out from the payout spindle 20 is wound. The payout spindle 20 supports one end of the substrate 100 by winding it therearound with the surface of the substrate 100 facing outward. As the payout spindle 20 rotates clockwise in FIG. 1, the substrate 100 wound around the payout spindle 20 is paid out via the driven roller 21 to the process area 3.

[0014] The driven roller 21 comes into contact with the substrate 100 and rotates in the transport direction Ds of the substrate 100 due to the frictional force between the driven roller 21 and the substrate 100 being transported. The substrate 100 is wound around the payout spindle 20 via a core tube 22 that is detachable from the payout spindle 20. When the substrate 100 on the payout spindle 20 is used up, a new core tube 22 around which a roll of substrate 100 is wound is attached to the payout spindle 20.

[0015] The process area 3 has a transport section 30 and a printing section 50 that performs printing on the substrate 100 transported by the transport section 30. The transport section 30 is provided with a front drive roller 31, a rotating drum 35 that supports the substrate 100 in a cylindrical shape, and a rear drive roller 32. The printing section 50 is provided with recording heads 51 and 52 and UV irradiators 61, 62, and 63.

[0016] In the processing area 3, the substrate 100 fed out from the feed area 2 is supported by a rotating drum 35, and the substrate 100 is appropriately processed by recording heads 51, 52 and UV irradiators 61, 62, 63 arranged along the outer peripheral surface of the rotating drum 35, and an image layer 200 is recorded on the substrate 100.

[0017] A front drive roller 31 that transports the substrate 100 toward the rotating drum 35 is provided upstream of the process area 3. A rear drive roller 32 that transports the substrate 100 toward the winding shaft 40 is provided downstream of the process area 3. The rotating drum 35 supports the substrate 100 that is transported from the front drive roller 31 to the rear drive roller 32.

[0018] The front drive roller 31 is cylindrical or columnar with a plurality of minute protrusions formed by thermal spraying on its outer circumferential surface, and wraps the back surface of the substrate 100 fed out of the feed region 2. The front drive roller 31 rotates clockwise in Fig. 1, whereby the substrate 100 fed out of the feed region 2 is transported downstream of the transport path Pc.

[0019] A nip roller 31n is provided facing the front driving roller 31. The nip roller 31n comes into contact with the surface of the substrate 100 while being biased toward the front driving roller 31, and sandwiches the substrate 100 between the front driving roller 31 and the nip roller 31n. This ensures friction between the front driving roller 31 and the substrate 100, and allows the front driving roller 31 to reliably transport the substrate 100.

[0020] The rotating drum 35 is a rotatably supported cylindrical drum, and wraps the back surface of the substrate 100 transported from the front drive roller 31 to the rear drive roller 32. The rotating drum 35 supports the substrate 100 from the back surface and rotates in the transport direction Ds of the substrate 100 by receiving a frictional force between the rotating drum 35 and the transported substrate 100.

[0021] In the process area 3, driven rollers 33 and 34 are provided that change the traveling direction of the substrate 100 on both sides in the transport direction Ds of the area where the substrate 100 is wrapped around the rotating drum 35. The driven roller 33 wraps the surface of the substrate 100 between the front drive roller 31 and the rotating drum 35 in the transport direction Ds, and turns back the traveling direction of the substrate 100 toward the rotating drum 35.

[0022] The driven roller 34 wraps the surface of the substrate 100 between the rotating drum 35 and the rear drive roller 32 in the conveying direction Ds, and turns back the traveling direction of the substrate 100. By turning back the substrate 100 on both the upstream side and the downstream side of the conveying direction Ds with respect to the rotating drum 35, it is possible to ensure a long winding length of the substrate 100 around the rotating drum 35.

[0023] The rear drive roller 32 is cylindrical or columnar with a plurality of small protrusions formed by thermal spraying on its outer circumferential surface, and winds the substrate 100, which has been transported from the rotating drum 35 via the driven roller 34, from the back side. The rear drive roller 32 rotates clockwise in FIG. 1, whereby the substrate 100 is transported to the winding region 4. A nip roller 32n is provided opposite the rear drive roller 32.

[0024] The nip roller 32n comes into contact with the surface of the substrate 100 while being biased toward the rear driving roller 32, and sandwiches the substrate 100 between itself and the rear driving roller 32. This ensures a frictional force between the rear driving roller 32 and the substrate 100, and allows the rear driving roller 32 to reliably transport the substrate 100.

[0025] In this manner, the substrate 100 transported from the front drive roller 31 to the rear drive roller 32 is supported on the outer circumferential surface of the rotating drum 35. In the process area 3, a plurality of recording heads 51 corresponding to different colors are provided to print a color image on the surface of the substrate 100 supported by the rotating drum 35. In this embodiment, four recording heads 51 are arranged in the transport direction Ds.

[0026] Each recording head 51 faces the surface of the substrate 100 wrapped around the rotating drum 35 with a small clearance, and ejects ink of the corresponding color from nozzles of the recording head 51 onto the substrate 100 by an inkjet method. The printing device 1 of this embodiment uses ultraviolet-curable ink that is cured by irradiation with ultraviolet rays, and forms an image layer 200 on the substrate 100 (see FIGS. 4 and 5). Hereinafter, ultraviolet-curable ink is also referred to as UV ink.

[0027] In the process area 3, UV irradiators 61 and 62 are provided to cure the ink and fix it on the substrate 100. Curing of the ink is carried out in two stages: provisional curing and full curing. The provisional curing UV irradiator 61 is disposed between each of the recording heads 51. The UV irradiator 61 irradiates ultraviolet light with a weak irradiation intensity to provisionally cure the ink to such an extent that the ink spreads sufficiently slower than when no ultraviolet light is irradiated. This prevents color mixing, such as the mixing of different colored inks.

[0028] A UV irradiator 62 for main curing is provided downstream in the transport direction Ds from the multiple recording heads 51. The UV irradiator 62 main cures the ink to the extent that the ink stops spreading by irradiating ultraviolet light with a stronger irradiation intensity than the UV irradiator 61. The color image formed by the multiple recording heads 51 is main cured by the UV irradiator 62 and fixed to the substrate 100.

[0029] A recording head 52 is provided downstream of the UV irradiator 62 in the transport direction Ds. This recording head 52 faces the surface of the substrate 100 wrapped around the rotating drum 35 with a small clearance, and ejects UV ink that does not contain coloring material from nozzles onto the substrate 100 by an inkjet method. Hereinafter, the UV ink that does not contain coloring material is also referred to as transparent ink 320 (see FIG. 5). In other words, the transparent ink 320 is further ejected onto the image layer 200 formed by the recording head 51.

[0030] A UV irradiator 63 is provided downstream of the recording head 52 in the transport direction Ds. This UV irradiator 63 irradiates ultraviolet light with a stronger irradiation intensity than the UV irradiator 61, thereby fully curing the transparent ink 320 ejected by the recording head 52. This allows the transparent ink 320 to be fixed on the surface of the substrate 100.

[0031] The printing device 1 of this embodiment uses transparent ink 320 to form lines 300 in a shape having a cross-sectional shape that is a part of a non-circular arc that approximates an ellipse (see FIG. 5). In this manner, in the process area 3, ink is ejected and cured appropriately onto the substrate 100 that is wrapped around the outer periphery of the rotating drum 35. The substrate 100 (also referred to as the printed matter 1000) is transported to the winding area 4 by the rear drive roller 32.

[0032] The winding region 4 has, in addition to the winding shaft 40 around which the other end of the substrate 100 is wound, a driven roller 41 that winds the substrate 100 from the back surface side between the winding shaft 40 and the rear drive roller 32. The winding shaft 40 winds and supports the other end of the substrate 100 with the front surface of the substrate 100 facing outward.

[0033] 1, the substrate 100 conveyed from the rear drive roller 32 is wound onto the winding shaft 40 via the driven roller 41. The substrate 100 is wound onto the winding shaft 40 via a core tube 42 that is detachable from the winding shaft 40. Therefore, when the winding shaft 40 is filled with the substrate 100, the substrate 100 can be removed together with the core tube 42.

[0034] Next, the configuration of the printed matter 1000 will be described with reference to FIGS.

[0035] 2 to 4, the printed matter 1000 has an image layer 200 printed with colored inks laminated on a substrate 100. On the image layer 200, lines 300 having a plurality of thin lines 310 printed with transparent ink 320 are printed.

[0036] 4, the transparent ink 320 has a smooth surface and is free of any pigments or other factors that cause diffuse reflection inside, so the surface is prone to regular reflection. By printing the transparent ink 320 on the image layer 200, the cross section of the transparent ink 320 has a shape that is close to the cross section of an ellipsoidal spheroid with a large eccentricity.

[0037] Examples of colored inks include cyan, magenta, yellow, black, red, green, orange, and blue, as well as color inks that are specially formulated. The image layer 200 has lines such as characters and patterns.

[0038] 2, the parallel lines 300 made of transparent ink 320 are composed of a plurality of non-intersecting thin lines 310. Specifically, the parallel lines 300 have, on the image layer 200, for example, a first region 311 in which the plurality of thin lines 310 extend parallel to each other in a first direction, a second region 312 in which the plurality of thin lines extend parallel to the thin lines 310 in the first region 311 at an angle of 45° in the clockwise direction, a third region 313 in which the plurality of thin lines extend parallel to the thin lines 310 in the second region 312 at an angle of 45° in the clockwise direction, and a fourth region 314 in which the plurality of thin lines extend parallel to the thin lines 310 in the third region 313 at an angle of 45° in the clockwise direction.

[0039] The thin lines 310 are not limited to being inclined at 45 degrees, but may be arranged to be inclined at least 5 degrees or more. The intervals between adjacent thin lines 310 in each of the regions 311-314 are preferably the same, but do not have to be the same as long as they are not significantly different. The thin lines 310 are not limited to being straight, but may be formed as curved lines. This allows the shape of the region from which the sense of brightness is obtained on the surface of the printed matter 1000 to be changed.

[0040] In this way, by forming the line 300 having a plurality of regions 311-314, depending on the angle at which the observer views the printed matter 1000, for example, only the first region 311 appears bright overall, that is, only the first region 311 can be made to be a region of high brightness, as shown in Fig. 3. The regions 312-314 other than the first region 311 appear to be, for example, a dark color with low brightness.

[0041] Also, depending on the viewing angle of the observer, only the second region 312 or only the third region 313 may appear bright. In other words, the brightness can be changed depending on the location.

[0042] Next, the shape of the thin line 310 made of transparent ink 320 will be described with reference to FIG.

[0043] 5, the cross section of the printed transparent ink 320 tries to rise in a semicircular shape on the image layer 200 due to surface tension, but the center is depressed due to gravity, and the shape is roughly an ellipsoidal spheroid except for the part in contact with the substrate 100. In this way, because the transparent ink 320 has an elliptical shape, it is possible to change the direction of the specularly reflected light in relation to the orientation of the thin line 310 and the position of the light source L (see FIG. 6A).

[0044] 5, the width W1 of the thin wires 310 in the direction in which the thin wires 310 are adjacent to each other is, for example, 450 μm or less. The thickness W2 of the thickest part of the thin wires 310 is, for example, 10 μm. Thus, the width W1 of the thin wires 310 in the direction in which the thin wires 310 are adjacent to each other is less than 45 times the thickness W2 of the thickest part of the thin wires 310.

[0045] In this way, the elliptical thin lines 310 having the thickness W2 and width W1 are formed, so that the area in which the specularly reflected light is visible can be increased over a wider surface compared to when the clear ink 320 is formed solidly. Also, since the line 300 is composed of a plurality of thin lines 310, each of the thin lines 310 shines finely, increasing the sense of brightness. In other words, the design can be improved.

[0046] The distance between adjacent thin lines 310 among the multiple thin lines 310 is, for example, 20 μm. Note that this is not limited to 20 μm, and may be any distance that does not cause adjacent thin lines 310 to contact each other. In order to actually achieve a distance that does not cause adjacent thin lines 310 to contact each other, it is also affected by the resolution at which the inkjet printer used for printing can eject the thin lines 310. Specifically, the distance between adjacent thin lines 310 is about twice the resolution of the inkjet printer used for printing, that is, about 70 μm for 360 lpi, as a range in which the thin lines 310 do not contact each other, and good results can be obtained.

[0047] As described above, the width W1 of the thin wire 310 may be 450 μm or less, and more preferably, the width is less than 9 times the thickness W2 of the thickest part of the thin wire 310. The applicant conducted a sensory evaluation of printed matter in which the width W1 of the thin wire 310 and the relationship between the width and the thickness W2 of the thickest part of the thin wire 310 were appropriately changed, and discovered a range of the width W1 suitable for an elliptical shape that can change the angle at which the thin wire 310 appears to shine brightly. Specifically, as described above, the width W1 of the thin wire 310 may be 450 μm or less, and more preferably, the width is less than 9 times the thickness W2 of the thickest part of the thin wire 310.

[0048] By forming the elliptical thin line 310 having the thickness W2 and width W1, the shining of the areas 311-314 of the line 300 does not appear to be shining on a thin line basis, but each of the areas 311-314 as a whole, that is, on a surface basis, appears to be shining brightly. This allows for a unique sense of brightness, that is, enhanced design.

[0049] As described above, the lines 300 are preferably made of ultraviolet-curable ink. Since the lines 300 are thus formed using ultraviolet-curable ink, it becomes possible to three-dimensionally cure the fine lines 310, and to form them into a shape that includes a noncircular arc that approximates an ellipse.

[0050] Next, the arrangement angle of the thin lines 310, specifically, the visual effect of the lines 300 will be described with reference to FIGS. 6A to 8. FIG.

[0051] 6A and 6B, thin lines 310 made of transparent ink 320 are printed on the image layer 200. By continuously arranging the thin lines 310 printed with transparent ink 320 in this manner, it is possible to limit the area that appears to be brighter.

[0052] As described above, the thin lines 310 formed with the transparent ink 320 have an elliptical shape. Therefore, by continuously arranging the thin lines 310, the expression of the surface lightness changes compared to the case where the transparent ink 320 is formed in a planar shape.

[0053] Furthermore, as shown in FIGS. 6A and 6B, by changing the direction in which the thin wire 310 extends relative to the light source L, the area and angle of light irradiation change, and the area that appears to be brighter changes.

[0054] The thin line 310 can be formed into a flat shape with a large eccentricity by appropriately selecting the amount of transparent ink 320. As shown in Fig. 5, the width W1 of the thin line 310 is desirably 85 µm or more, which corresponds to the resolution at which a near visual acuity of 1.0 can be recognized as a line.

[0055] Near vision is the ability to distinguish two points 30 cm apart as two points. Near vision of 1.0 is the ability to distinguish two points that make up 1 minute of visual angle, which is 1 / 60 degrees. 30 cm is close to the distance at which a person reads a printed material such as a book, and near vision of 1.0 is sufficient for everyday life.

[0056] The reason why the thin lines 310 in the regions 311 to 314 constituting the parallel lines 300 are arranged so that the angle is inclined at least 5° as described above will be described below.

[0057] In order to change the area where the brightness appears to increase, the angle of the thin line 310 needs to be different by 5° or more. As shown in Fig. 7A and Fig. 7B, when the distance between the eyes is 5 cm and the thin line 310 is viewed from a distance of 30 cm, the brightness entering both eyes changes when the thin line 310 is tilted by about 10°. Therefore, if the thin line 310 is tilted by 5°, the observer can recognize that the bright areas 311 to 314 have changed. The distance between the eyes of 5 cm is based on the average distance between the eyes of elementary school children in the lower grades.

[0058] Since the image layer 200 disposed below the transparent ink 320 is subject to specular reflection from the transparent ink 320, if the lightness is low, the difference in lightness with the specularly reflected light becomes large, making it difficult to recognize the color of the image layer 200. When the illuminance from the light source L increases, the specularly reflected light increases and the brightness that appears to be bright increases, but at the same time, the amount of light that passes through the transparent ink 320 and is diffusely reflected by the image layer 200 also increases, and the brightness of the image layer 200 also increases.

[0059] The glossiness of the transparent ink 320 varies depending on the angle, but is generally about 50 to 70. Therefore, as shown in FIG. 8, if the brightness of the image layer 200 is L* in the L*a*b* color system and L* is 70 or less, the brightness difference can be emphasized. Note that it does not matter if L* exceeds 70 in some parts. In this way, by printing the image layer 200 below the transparent ink 320, the brightness difference caused by the transparent ink 320 can be emphasized.

[0060] Next, a method for printing the printed matter 1000 will be described with reference to FIG.

[0061] 9, in step S11, an image layer 200 is printed on the substrate 100. Specifically, as shown in FIGS. 4 and 5, the image layer 200 is printed on the substrate 100 using a recording head 51 that ejects colored inks.

[0062] Next, in step S12, the transparent ink 320 is printed on the image layer 200. Specifically, the transparent ink 320, i.e., thin lines 310, are printed on the image layer 200 using the recording head 52 that ejects the transparent ink 320 that does not contain a coloring material. As a result, lines 300 are printed on the image layer 200. As described above, the transparent ink 320 is a UV ink, and is cured by ultraviolet light irradiated from the UV irradiator 63 into a cross-sectional shape having a part of a non-circular arc that approximates an ellipse.

[0063] As described above, the printed matter 1000 of this embodiment has a substrate 100, an image layer 200 formed on the substrate 100 using colored inks, and lines 300 in which multiple non-intersecting thin lines 310 are formed on the image layer 200 using transparent ink 320, the image layer 200 having a brightness of L*≦70 in the L*a*b* color system, and the width W1 of the thin lines 310 in the direction in which the multiple thin lines 310 are adjacent to each other is less than 45 times the thickness W2 of the thickest part of the thin lines 310.

[0064] According to this configuration, the thin lines 310 are formed in an elliptical shape having the thickness W2 and width W1 described above, so that it is possible to increase the bright and glossy area over a wider surface compared to when the clear ink 320 is formed solidly. Also, since the lines 300 are composed of a plurality of thin lines 310, each of the thin lines 310 shines finely, increasing the sense of brightness. In other words, it is possible to improve the design.

[0065] Also, by configuring each of the regions 311-314 with a plurality of thin lines 310, some people may see it as if it were painted with a solid layer of transparent ink 320, but it can be seen as having a different texture compared to a regular reflection. Specifically, by making the shape of the thin lines 310 semicylindrical, in addition to the effect that the entire surface appears shiny, it is possible to switch between high and low brightness for each of the regions 311-314.

[0066] In the printed matter 1000 of this embodiment, the width W1 of the thin lines 310 in the direction in which the thin lines 310 are adjacent to each other is preferably less than nine times the thickness W2 of the thickest part of the thin lines 310. With this configuration, the thin lines 310 are formed in an elliptical shape having the above-mentioned thickness W2 and width W1, so that the areas 311-314 of the lines 300 do not appear to shine in units of the thin lines 310, but rather the entire areas 311-314, that is, each area, appears to shine. This can improve the design.

[0067] Moreover, in the printed matter 1000 of this embodiment, it is preferable that the lines 300 have a first region 311 in which the thin lines 310 are arranged at a first angle, and a second region 312 in which the thin lines 310 are arranged at a second angle different from the first angle. According to this configuration, by forming the regions 311 and 312 in which the angles of the thin lines 310 are changed, such as the first angle and the second angle, the first region 311 and the second region 312 can be made to appear to be shiny or not shiny depending on the viewer's viewing angle. In other words, the region that appears bright changes. This can improve the design.

[0068] In addition, in the printed matter 1000 of this embodiment, it is preferable that the first angle and the second angle differ by 5° or more. With this configuration, since the first angle and the second angle differ by 5° or more, when the first region 311 arranged at the first angle appears to be shiny, it is possible to make the second region 312 arranged at the second angle not appear to be shiny. On the other hand, when the second region 312 appears to be shiny, it is possible to make the first region 311 not appear to be shiny.

[0069] In addition, the printing method of this embodiment includes a step of forming an image layer 200 on a substrate 100 using colored inks, and a step of forming lines 300 including a plurality of non-intersecting thin lines 310 on the image layer 200 using transparent ink 320, wherein the image layer 200 has a brightness of L*≦70 in the L*a*b* color system, and the width W1 of the thin lines 310 in the direction in which the thin lines 310 are adjacent to each other is less than 45 times the thickness W2 of the thickest part of the thin lines 310.

[0070] According to this method, an elliptical thin line 310 having the above-mentioned thickness W2 and width W1 is formed, so that the area in which regular reflection is visible can be increased over a wider surface compared to when the clear ink 320 is formed solidly. Also, since the line 300 is composed of multiple thin lines 310, each of the thin lines 310 shines finely, increasing the brightness. In other words, the design can be improved.

[0071] In this embodiment, the thin wire 310 is illustrated as a line having a constant line width, but the width or gap of the thin wire 310 may change within the range of the above-mentioned thickness W2 and width W1, and to the extent that they do not contact each other.

[0072] Modifications of the above embodiment will now be described.

[0073] As shown in FIG. 2 above, the arrangement is not limited to the first region 311 to the fourth region 314 in which the thin wire 310 has different directions arranged toward the inside of the circle, but the thin wire 310 may be configured with regions in which the directions are different, as shown in FIG. 10.

[0074] As shown in FIG. 10, the printed matter 1000A of the modified example has a first region 311A ​​in which multiple thin lines 310 are arranged at a first angle, a second region 312A in which multiple thin lines 310 are arranged at a second angle different from the first angle, a third region 313A in which multiple thin lines 310 are arranged at a third angle different from the first angle and the second angle, and a fourth region 314A in which multiple thin lines 310 are arranged at a fourth angle different from the first angle to the third angle.

[0075] In this way, by having at least four different regions 311A ​​to 314A, it is possible to utilize the so-called four color theorem. The four color theorem is the theorem that "four colors are sufficient to paint any map on a plane so that adjacent regions are different colors." This makes it possible to make the orientation of the thin lines 310 different in adjacent regions, regardless of the shape of the regions, and each region can be seen to shine or not.

[0076] In the printed matter 1000A of this modification, the lines 300 have a third region 313A in which the thin lines 310 are arranged at a third angle different from the first angle and the second angle, and a fourth region 314A in which the thin lines 310 are arranged at a fourth angle different from the first angle, the second angle, and the third angle, and it is preferable that each of the first region 311A, the second region 312A, the third region 313A, and the fourth region 314A is adjacent to a different region. With this configuration, by having at least four different regions 311A ​​to 314A, it is possible to make the angle of the thin lines 310 different from adjacent regions, and the adjacent regions can be seen to shine or not. [Explanation of symbols]

[0077] 1...printing device, 2...feeding area, 3...process area, 4...winding area, 10...control section, 20...feeding shaft, 21...driven roller, 22...core tube, 30...conveying section, 31...front driving roller, 31n...nip roller, 32...rear driving roller, 32n...nip roller, 33, 34...driven roller, 35...rotating drum, 40...winding shaft, 41...driven roller, 4 2...core tube, 50...printing section, 51, 52...recording head, 61, 62, 63...UV irradiator, 100...substrate, 200...image layer, 300...lines, 310...fine lines, 311, 311A...first region, 312, 312A...second region, 313, 313A...third region, 314, 314A...fourth region, 320...transparent ink, 1000...printed matter, 1000A...printed matter.

Claims

1. A substrate; an image layer formed on the substrate using a colored ink; a plurality of thin lines that do not intersect each other and are formed on the image layer using a transparent ink; having the image layer has a brightness of L*≦70 in the L*a*b* color system; A printed matter, wherein the width of the thin lines in a direction in which the thin lines are adjacent to each other is less than 45 times the thickness of the thickest part of the thin lines.

2. The printed matter according to claim 1, A printed matter, wherein the width of the thin lines in a direction in which the thin lines are adjacent to each other is less than nine times the thickness of the thickest part of the thin lines.

3. The printed matter according to claim 1, The printed matter, wherein the parallel lines have a first region in which the thin lines are arranged at a first angle and a second region in which the thin lines are arranged at a second angle different from the first angle.

4. The printed matter according to claim 3, The first angle and the second angle differ by 5° or more.

5. The printed matter according to claim 3, the parallel lines have a third region in which the thin lines are arranged at a third angle different from the first angle and the second angle, and a fourth region in which the thin lines are arranged at a fourth angle different from the first angle, the second angle, and the third angle, A printed matter, wherein each of the first region, the second region, the third region, and the fourth region is adjacent to a different region.

6. forming an image layer on a substrate using a colored ink; forming a plurality of thin lines, each of which does not intersect, on the image layer using a transparent ink; having the image layer has a brightness of L*≦70 in the L*a*b* color system; A printing method, wherein a width of the thin lines in a direction in which the thin lines are adjacent to each other is less than 45 times the thickness of the thickest part of the thin lines.

Images