Colorimetric method, repair painting method, and manufacturing method for painted object

Abstract

To provide a colorimetric method, a repair painting method, and a manufacturing method for a painted object, capable of shortening the color adjustment time and suppressing excessive production of paint during the color adjustment process.SOLUTION: A colorimetric method is for comparing the color of an object 100 with the color of a color matching painted plate 10. The colorimetric method includes forming a line 11 with a width d11 of 3 mm or more and 12 mm or less on a surface 100a of the object 100, arranging the color matching painted plate 10 to be in contact with the line 11, and comparing the color of the object 100 with the color of the color matching painted plate 10 by sandwiching the line 11 between them.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a color comparison method, a repair painting method, and a method for producing a painted object. [Background technology]

[0002] When mixing paint for automotive repairs, the color must match so that it doesn't look out of place when applied to the object. To check whether the color of the mixed paint matches, a mixed-color paint board is made before the mixed paint is applied to the object, and the mixed-color paint board is placed directly on the object and checked visually. The object and mixed-color paint board look different depending on the worker's position and the angle from which the object and mixed-color paint board are viewed, so the work is checked from various angles.

[0003] As a method for completing a color matching operation in a small number of times regardless of the skill level of an operator, for example, a method described in Patent Document 1 is known. Also, as a method for improving color matching accuracy and work efficiency, for example, a method described in Patent Document 2 is known. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-107781 [Patent Document 2] International Publication No. 2018 / 070428 Summary of the Invention [Problem to be solved by the invention]

[0005] As mentioned above, when the color-matching plate is placed directly on the object, the difference in color becomes clear, and it tends to be difficult to judge whether the color of the matched paint is consistent. If the judgment is difficult, there is a problem that it is wasteful to repeat color matching more than necessary or to recreate the color-matching plate.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a color comparison method, a repair painting method, and a method for manufacturing a painted object that can accurately determine whether the colors of mixed paints match. [Means for solving the problem]

[0007] The present invention has the following aspects. [1] A color comparison method for comparing the color of an object with the color of a color-matched paint plate, comprising the steps of: A color comparison method comprising forming a line having a width of 3 mm to 12 mm on the surface of the object, placing the color-matching plate so that it is in contact with the line, and comparing the color of the object and the color of the color-matching plate across the line. [2] The color-comparison method according to [1], wherein the size of the color-matching plate is 100 mm x 50 mm or more. [3] A color comparison method according to [1] or [2], comprising forming a frame of the same size as the color-matching plate, the frame having one side including the line having a width of 3 mm or more and 12 mm or less, positioning the color-matching plate so that it is in contact with the line having a width of 3 mm or more and 12 mm or less, and comparing the color of the object within the frame with the color of the color-matching plate. [4] The color comparison method described in [1] or [2], which comprises forming two frames of the same size as the color-matching plate, which are connected via a line having a width of 3 mm or more and 12 mm or less, placing the color-matching plate inside one of the frames, and comparing the color of an object inside the other side of the frame where the color-matching plate is not placed with the color of the color-matching plate. [5] A repair painting method for painting an object having a repair part, comprising: A first step of mixing a paint to be applied to the repaired area; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area; If it is determined in the third step that painting is to be performed, a fourth step of painting the paint prepared in the first step on the repaired portion, A repair painting method in which, in the third step, a line having a width of 3 mm to 12 mm is formed on the surface of the object, the color-matching paint plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching paint plate are compared across the line. [6] A repair painting method for painting an object having a repair part, comprising: A first step of mixing a paint to be applied to the damaged area of ​​the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area; If it is determined in the third step that painting is to be performed, a fourth step of applying a gradient paint to the repair area using the paint prepared in the first step, A repair painting method in which, in the third step, a line having a width of 5 mm to 12 mm is formed on the surface of the object, the color-matching paint plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching paint plate are compared across the line. [7] A repair painting method for painting an object having a repair area, comprising: A first step of mixing a paint to be applied to the repaired portion of the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area; If it is determined in the third step that painting is to be performed, a fourth step of block-painting the paint prepared in the first step onto the part including the repaired portion, A repair painting method in which, in the third step, a line having a width of 3 mm to 5 mm is formed on the surface of the object, the color-matching plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line. [8] before the first step, a step A is carried out in which the color of the object is measured by a colorimeter; The repair painting method according to any one of [5] to [7], further comprising a step B between the second step and the third step or between the third step and the fourth step, of measuring the color-matched painted board prepared in the second step with a colorimeter and comparing the measurement result with the measurement result obtained in the step A. [9] The refinish painting method described in [8], wherein in the first step, the measurement results obtained in step A are input into a computer-based color matching device, and the paint is mixed based on the obtained data.

[10] A refinish painting method as described in [8] or [9], wherein in step B, the measurement results obtained by measuring the color-matched painted board are input into a computer-based color matching device and compared with the measurement results obtained in step A.

[11] A method for producing a coated object by painting any part of an object, comprising the steps of: A first step of mixing a paint to be applied to the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the color-matching paint plate with the color of the object to determine the color tone of the paint to be applied to the object; A fourth step of painting the object with a paint having the color tone determined in the third step, In the third step, a line having a width of 3 mm or more and 12 mm or less is formed on the surface of the object, the color-matching paint plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching paint plate are compared across the line. Effect of the Invention

[0008] According to the present invention, it is possible to provide a color comparison method, a repair painting method, and a manufacturing method for a painted object, which are capable of accurately determining whether the colors of matched paints match. By accurately determining whether the colors of matched paints match, it is possible to reduce unnecessary color matching work, thereby shortening the time required for color matching work and saving the amount of paint required for color matching work. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a colorimetric method according to one embodiment of the present invention. [Diagram 2] FIG. 1 is a schematic diagram showing a colorimetric method according to one embodiment of the present invention. [Diagram 3] FIG. 1 is a schematic diagram showing a colorimetric method according to one embodiment of the present invention. [Figure 4] FIG. 2 is a schematic diagram showing a case where the third step in the repair painting method according to one embodiment of the present invention is carried out using a color comparison method according to one embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic diagram showing a case where a third step in a method for producing a coated article according to an embodiment of the present invention is carried out using a color comparison method according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The color comparison method, the repair coating method, and the method for producing a coated article according to the present invention will be described below. It should be noted that the present embodiment is specifically described to allow a better understanding of the gist of the invention, and does not limit the present invention unless otherwise specified.

[0011] [Colorimetric method] A color comparison method according to one embodiment of the present invention is a color comparison method for comparing the color of an object with the color of a toning paint plate, in which a line having a width of 3 mm or more and 12 mm or less is formed on the surface of the object, the toning paint plate is placed so that it is in contact with the line, and the color of the object and the color of the toning paint plate are compared across the line.

[0012] (First embodiment) In the color comparison method of this embodiment, a line measuring 3 mm or more and 12 mm or less in width is formed on the surface of an object, the color-matching plate is placed so that it is in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

[0013] The colorimetric method of the present embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing the colorimetric method of the present embodiment. As shown in FIG. 1, in the color comparison method of the present embodiment, first, a colorimetric field having a width of d 11 The line 11 may be a straight line or a curved line, and the shape of the line 11 may be appropriately selected according to the shapes of the object 100 and the toning paint board 10.

[0014] Width d of line 11 11 The width d of the line 11 is 3 mm or more and 12 mm or less, and preferably 5 mm or more and 10 mm or less. 11 If the width d of the line 11 is less than the lower limit, the color of the object 100 and the color of the color-matched plate 10 are judged to be different by visual inspection, and it becomes difficult to judge the acceptable color tone in matching the color of the object 100 and the color of the color-matched plate 10. 11 If exceeds the upper limit, it is impossible to visually determine whether the difference between the color of the object 100 and the color of the toned paint board 10 is acceptable.

[0015] The line 11 can be made of any material capable of forming a line, such as masking tape, vinyl tape, paper tape, duct tape, magnetic tape, or other tapes, as well as paper, cloth, magnet, ink, etc. Among these, it is preferable to use masking tape from the viewpoint of workability. The color of the line 11 is not particularly limited, but examples include yellow, blue, and green. Colors that are irritating to the human eye, such as red and pink, are not preferred. The color of the line 11 does not need to match the color of the object 100, and any color as described above will suffice. The color of the line 11 may be similar to the color of the object 100, and it is sufficient that the presence of the line 11 on the surface 100a of the object 100 can be recognized by the naked eye. The thickness of the wire 11 is not particularly limited, but is preferably, for example, several tens of μm or more and several mm or less.

[0016] Next, the color-matching plate 10 is placed on the surface 100 a of the object 100 so as to be in contact with the line 11 . A coating film is formed on the color-matching plate 10 by applying a paint with a previously matched color. In addition, the color-matching plate is not limited to the color-matching plate, and a color sample card, color chart, etc. may be used. The material of the color-matching plate may be any material such as tinplate, steel plate, paper, plastic, etc., but when the object is not flat, flexible materials such as tinplate and paper are preferable.

[0017] The size of the toning plate 10 is preferably 100 mm × 50 mm or more, more preferably 120 mm × 60 mm or more, and even more preferably 150 mm × 70 mm or more. When the size of the toning plate 10 is equal to or more than the lower limit, the workability and the accuracy of the toning judgment are improved. The size of the toning paint board 10 is preferably 300 mm×200 mm or less, and more preferably 200 mm×100 mm or less.

[0018] After placing the toning plate 10 so as to be in contact with the line 11, the color of the object 100 and the color of the toning plate 10 are compared across the line 11. The color of the object 100 is compared with the color of the toning board 10 by visual inspection. In the visual comparison, if the toning worker judges that there will be no sense of incongruity when the color of the toning board 10 is applied to the object 100, the color of the toning board 10 is judged as "passed", and if the worker judges that there is a high possibility that there will be incongruity, the color of the toning board 10 is judged as "failed".

[0019] According to the color-matching method of the present embodiment, it is possible to prevent overly strict judgment of color match when comparing the color of the object 100 with the color-matched paint board 10. As a result, it is possible to reduce the number of color-matching operations in automobile refinish painting work, thereby shortening the color-matching time and preventing overproduction of paint for producing the color-matched paint board 10.

[0020] Second embodiment In the color comparison method of this embodiment, a frame of the same size as the toning plate is formed, with one side being a line measuring 3 mm or more and 12 mm or less in width, and the toning plate is placed so that it is in contact with the line measuring 3 mm or more and 12 mm or less in width, and the color of the object within the frame is compared with the color of the toning plate.

[0021] The colorimetric method of this embodiment will be described with reference to Fig. 2. Fig. 2 is a schematic diagram showing the colorimetric method of this embodiment. As shown in FIG. 2, in the color comparison method of the present embodiment, first, a colorimetric field having a width d 21 The frame 20 has at least one side having a line 21 of 3 mm or more and 12 mm or less. The frame 20 has a width d 21 In addition to the line 21 with a width of 3 mm or more and 12 mm or less, 22 However, the frame 20 may have a line 22, which is not particularly limited. As for the size and shape of the frame 20, it is preferable that the inner frame of the frame 20 is the same size and shape as the color-matching plate 10 used to match the color of the paint to be applied to the object 100. However, depending on the size and shape of the object 100 and the color-matching plate 10, it may be difficult to match the inner frame of the frame 20 with the size and shape of the color-matching plate 10. In that case, the frame 20 may be of a size and shape that the color-matching operator can recognize as being approximately the same as the size and shape of the color-matching plate 10. In addition, examples of the shape of the frame 20 in a plan view include a rectangular shape, a square shape, a circular shape, an elliptical shape, and the like. Among these, a rectangular shape is preferable from the viewpoint of improving workability and accuracy of color-matching judgment. A rectangular shape allows the front color and the watermark color to be compared at the same time.

[0022] Width d of line 21 21 The width d of the line 21 is 3 mm or more and 12 mm or less, and preferably 5 mm or more and 10 mm or less. 21 If the width d of the line 21 is less than the lower limit, the color of the object 100 in the frame 20 and the color of the toned painted board 10 will be judged to be different by visual inspection, and it will be difficult to judge the acceptable color tone in matching the color of the object 100 in the frame 20 and the color of the toned painted board 10. 21 When the width d of the line 22 exceeds the upper limit, it is not possible to visually determine whether the difference between the color of the object 100 in the frame 20 and the color of the color-matched paint board 10 is acceptable. 22 is not particularly limited, but is preferably 3 mm or more.

[0023] The lines 21 and 22 can be formed of the same material and color as in the first embodiment.

[0024] Next, the toning painting board 10 is placed on the surface 100a of the object 100 so as to be in contact with the line 21. In detail, the toning painting board 10 is placed in the area outside the frame 20 on the surface 100a of the object 100 so as to be in contact with the line 21. In other words, within the frame 20, the surface 100a of the object 100 is exposed. A coating film is formed on the color-matching plate 10 by applying a paint with a previously matched color. In addition, the color-matching plate is not limited to the color-matching plate, and a color sample card, color chart, etc. may be used. The material of the color-matching plate may be any material such as tinplate, steel plate, paper, plastic, etc., but when the object is not flat, flexible materials such as tinplate and paper are preferable.

[0025] The size of the toning plate 10 is preferably 100 mm × 50 mm or more, more preferably 120 mm × 60 mm or more, and even more preferably 150 mm × 70 mm or more. When the size of the toning plate 10 is equal to or more than the lower limit, the workability and the accuracy of the toning judgment are improved. The size of the toning paint board 10 is preferably 300 mm×200 mm or less, and more preferably 200 mm×100 mm or less.

[0026] After placing the toning board 10 so that it is in contact with the line 21, the color of the object 100 within the frame 20 is compared with the color of the toning board 10. The comparison between the color of the object 100 in the frame 20 and the color of the toned paint board 10 is made visually. In the visual comparison, if the color matching worker judges that there will be no incongruity when the color of the color-matching painted board 10 is applied to the object 100, the color of the color-matching painted board 10 is judged as "passed," and if the worker judges that there is a high possibility that there will be incongruity, the color of the color-matching painted board 10 is judged as "failed."

[0027] According to the color-matching method of the present embodiment, it is possible to prevent overly strict judgment of color match when comparing the color of the object 100 with the color-matched paint board 10. As a result, it is possible to reduce the number of color-matching operations in automobile refinish painting work, thereby shortening the color-matching time and preventing overproduction of paint for producing the color-matched paint board 10.

[0028] (Third embodiment) In the color comparison method of this embodiment, two frames of the same size as the toning painted plate are formed, connected via a line with a width of 3 mm to 12 mm, and the toning painted plate is placed inside one of the two frames.The color of the object inside the other of the two frames, in which the toning painted plate is not placed, is compared with the color of the toning painted plate.

[0029] The colorimetric method of this embodiment will be described with reference to Fig. 3. Fig. 3 is a schematic diagram showing the colorimetric method of this embodiment. As shown in FIG. 3, in the color comparison method of the present embodiment, first, a color field having a width d 31 Two frames 30 are formed, which are in contact with each other via a line 31 having a width of 3 mm or more and 12 mm or less. In this embodiment, the frame 30 has a first frame 30A and a second frame 30B which are equal in size. The first frame 30A and the second frame 30B are connected to each other via a line (boundary line) 31 which is the boundary between the two frames 30 (the first frame 30A and the second frame 30B). In addition to the boundary line 31, the first frame 30A and the second frame 30B have a width d 32 However, the size and shape of the first frame 30A and the second frame 30B are preferably the same as that of the color-matching board 10 used to match the paint to be applied to the object 100. However, depending on the size and shape of the object 100 and the color-matching board 10, it may be difficult to match the size and shape of the first frame 30A and the second frame 30B with that of the color-matching board 10. In that case, the size of the first frame 30A and the second frame 30B may be such that the color-matching operator can recognize that the size and shape of the first frame 30A and the second frame 30B are approximately the same as that of the color-matching board 10. In addition, examples of the shape of the frame 30 in plan view include a rectangular shape, a square shape, a circular shape, an elliptical shape, and the like. Among these, a rectangular shape is preferable from the viewpoint of improving workability and accuracy of color-matching judgment. A rectangular shape allows the front color and the watermark color to be compared at the same time.

[0030] Width d of line 31 31 The width d of the line 31 is 3 mm or more and 12 mm or less, and preferably 5 mm or more and 10 mm or less. 31If the width d of the line 31 is less than the lower limit, the color of the object 100 in the frame 30 and the color of the toned painted board 10 will be judged to be different by visual inspection, and it will be difficult to judge the acceptable color tone in matching the color of the object 100 in the frame 30 and the color of the toned painted board 10. 31 When the width d of the line 32 exceeds the upper limit, it is not possible to visually determine whether the difference between the color of the object 100 in the frame 30 and the color of the color-matching plate 10 is acceptable. 32 is not particularly limited, but is preferably 3 mm or more.

[0031] The lines 31 and 32 can be formed of the same material and color as in the first embodiment.

[0032] Next, the toning painted board 10 is placed inside one of the two frames 30 (for example, the first frame 30A) on the surface 100a of the object 100. At this time, the toning painted board 10 is placed so as to be in contact with the line 31.

[0033] After placing the color-matching painted board 10 inside one of the two frames 30, the color of the object 100 inside the other of the two frames 30 (e.g., the second frame 30B) in which the color-matching painted board 10 is not placed is compared with the color of the color-matching painted board 10. The color of the toned painted board 10 inside the first frame 30A and the color of the object 100 inside the second frame 30B are compared visually. In the visual comparison, the color of the toned painted board 10 is judged in the same manner as in the first embodiment.

[0034] According to the color-matching method of the present embodiment, it is possible to prevent overly strict judgment of color match when comparing the color of the object 100 with the color-matched painted board 10. As a result, it is possible to reduce the number of color-matching operations in automobile refinish painting work, thereby shortening the color-matching time and preventing overproduction of paint for producing the color-matched painted board.

[0035] [Repair painting method] (First embodiment) The repair painting method of this embodiment is a repair painting method for painting an object having a repair area, and includes a first step of mixing paint to be painted on the repair area, a second step of painting the paint onto a color-matched paint board, a third step of visually comparing the color of the color-matched paint board with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area, and a fourth step of painting the paint prepared in the first step to the repair area if it is determined in the third step that painting should be done. In the third step, a line having a width of 3 mm or more and 12 mm or less is formed on the surface of the object, a color-matched paint board is placed so that it is in contact with the line, and the color of the object and the color of the color-matched paint board are compared across the line.

[0036] In the first step, the paint to be applied to the repaired area of ​​the object is mixed. The repaired area is a part of the object where the paint has peeled off due to damage or other reasons. In mixing paint, a paint is mixed to a predetermined color based on visual inspection of the object or on data relating to the color of the object.

[0037] In the repair painting method of this embodiment, it is preferable to carry out a step A of measuring the color of the object with a colorimeter before the first step. This makes it possible to obtain optical data of the target color, and to proceed with the color matching work more efficiently. As the colorimeter, for example, a colorimeter, a color difference meter, a spectrophotometer, or the like can be used.

[0038] In the first step of the repair coating method of the present embodiment, it is preferable to input the measurement results obtained in step A into a color matching device using a computer, and to match the paint based on the obtained data. This can reduce the time and number of times required for matching the paint.

[0039] In the second step, the paint to be mixed in the first step is applied to the mixed-color paint plate. The method for painting the color-matched painted plate is not particularly limited, but examples thereof include methods using a brush, a spray, a paint roller, and the like. The color-matching plate may be made of any material, such as tinplate, steel plate, paper, or plastic. When the object is not flat, flexible materials such as tinplate or paper are preferred. The size of the toning plate is preferably 100 mm × 50 mm or more, more preferably 120 mm × 60 mm or more, and even more preferably 150 mm × 70 mm or more. When the size of the toning plate is equal to or more than the lower limit, the workability and the accuracy of the toning judgment are improved. The size of the color-matching plate is preferably 300 mm x 200 mm or less, and more preferably 200 mm x 100 mm or less. The shape of the color-matching plate may be, for example, rectangular, square, circular, elliptical, etc. Among these, the rectangular shape is preferred from the viewpoint of improving workability and accuracy of color matching judgment. With the rectangular shape, the front color and the watermark color can be compared at the same time.

[0040] In the third step, the color of the toned paint plate is visually compared with the color of the area adjacent to the repair area on the object to determine whether or not to paint the repair area.

[0041] In the third step, a line measuring 3 mm to 12 mm wide is formed on the surface of the object, a color-matching plate is placed in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line. In the third step, the colors are compared using the above-mentioned color comparison method. Fig. 4 is a schematic diagram of the third step performed using the above-mentioned color comparison method (second embodiment). A colorimetric area of ​​width d 41 A frame 40 is formed that is the same size as the toned painted plate 50 produced in the second step, and has at least one line with a width of 3 mm to 12 mm as one side. When the color comparison method (first embodiment) is used, a line with a width of 3 mm to 12 mm is formed in the area adjacent to the repaired part on the surface of the object, and when the color comparison method (third embodiment) is used, two frames with the same size as the toned painted plate produced in the second step are formed in the area adjacent to the repaired part on the surface of the object, the frames contacting each other via a line with a width of 3 mm to 12 mm.

[0042] The color of the object and the color of the toned paint board are compared visually. If the toning worker judges in the visual comparison that there will be no incongruity when the color of the toned paint board is painted on the object, the color of the toned paint board is judged as "passed", and if the worker judges that there is a high possibility of incongruity, the color of the toned paint board is judged as "failed". If the result of the judgment is "passed", it is judged that the paint used to prepare the toned paint board should be painted on the repaired area. If the result of the judgment is "failed", the first to third steps are repeated until it is passed. When the second or subsequent toning is performed after failing, the color may be matched based on the paint prepared previously.

[0043] In the fourth step, if it is determined in the third step that painting is to be performed, the paint prepared in the first step is applied to the repaired area.

[0044] In the repair coating method of this embodiment, it is preferable to carry out step B between the second and third steps, or between the third and fourth steps, in which the color-matched painted board prepared in the second step is measured with a colorimeter and the measurement result is compared with the measurement result obtained in step A. This improves the workability and the accuracy of the color matching judgment. In particular, if step B is carried out between the second and third steps, a failure judgment may be found before proceeding to the third step, and it is preferable to immediately return to the first step without carrying out the third step, thereby shortening the color matching work time.

[0045] In the repair coating method of this embodiment, it is preferable that in step B, the measurement results obtained by measuring the color-matched painted board are input into a color matching device using a computer and compared with the measurement results obtained in step A. This makes it possible to determine whether or not to proceed to the next step, thereby reducing the number of steps.

[0046] According to the repair painting method of this embodiment, it is possible to prevent the judgment of color matching from being too strict in the third step. As a result, the number of times of color matching can be reduced, which in turn makes it possible to shorten the color matching time and prevent the overproduction of paint for producing a color-matched painted board possible.

[0047] Second embodiment The repair painting method of this embodiment is a repair painting method for painting an object having a repair area, and includes a first step of mixing paint to be applied to the damaged area of ​​the object, a second step of applying the paint to a mixing paint board, a third step of visually comparing the color of the mixing paint board with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area, and a fourth step of applying a gradient paint prepared in the first step to the repair area if it is determined in the third step that painting should be done, in which in the third step, a line having a width of 5 mm to 12 mm is formed on the surface of the object, a mixing paint board is placed so that it is in contact with the line, and the color of the object and the color of the mixing paint board are compared across the line. Blending painting is a painting method in which the paint is applied in a gradually thinner layer as it moves away from the repair area. Because the paint is applied with a gradation, the difference in appearance between the target object and the repair area is not noticeable even if the color matching is not very accurate.

[0048] In the first step, similarly to the first embodiment, the color of the paint to be applied to the repaired portion of the object is mixed.

[0049] In the repair painting method of this embodiment, similarly to the first embodiment, it is preferable to carry out step A of measuring the color of the object with a colorimeter before the first step.

[0050] In addition, in the repair painting method of this embodiment, as in the first embodiment, in the first step, it is preferable to input the measurement results obtained in step A into a color matching device using a computer, and to mix the paint based on the obtained data.

[0051] In the second step, similarly to the first embodiment, the paint to be matched in the first step is applied to the matched paint plate.

[0052] In the third step, as in the first embodiment, the color of the toned painted plate is visually compared with the color of the area adjacent to the repaired portion on the object to determine whether to paint the repaired portion.

[0053] In the third step, a line measuring 5 mm to 12 mm wide is formed on the surface of the object, a color-matching plate is placed in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

[0054] In the third step, similarly to the first embodiment, the color is compared using the above-mentioned color comparison method to determine pass / fail. However, the lines 11, 21, and 31 with a width of 3 mm or more and 12 mm or less in the above-mentioned color comparison method are replaced with lines with a width of 5 mm or more and 12 mm or less to compare the colors. In the visual comparison, if the color-matching worker judges that there will be no sense of incongruity when the color of the color-matching board is painted on the object, the color of the color-matching board is judged as "pass", and if the worker judges that there is a high possibility of incongruity, the color of the color-matching board is judged as "fail". If the result of the judgment is pass, it is judged that the paint used in producing the color-matching board is to be painted on the repaired part. If the result of the judgment is fail, the first to third steps are repeated until the result is pass. When performing the second or subsequent color matching after failing, the color may be matched based on the paint produced before.

[0055] In the fourth step, if it is decided in the third step that painting should be performed, the paint prepared in the first step is applied to the repaired area in a blended manner. Blending painting is a painting method in which the paint is spread gradually thinner as it moves away from the repair area, so that the difference in appearance between the target object and the repair area is not noticeable.

[0056] In the repair painting method of this embodiment, as in the first embodiment, it is preferable to carry out step B between the second and third steps, or between the third and fourth steps, in which the color-matched painted board prepared in the second step is measured with a colorimeter and the measurement result is compared with the measurement result obtained in step A.

[0057] In addition, in the repair painting method of this embodiment, as in the first embodiment, in step B, it is preferable to input the measurement results obtained by measuring the color-matched painted board into a computer-based color matching device and compare them with the measurement results obtained in step A.

[0058] According to the repair painting method of this embodiment, when comparing the color of the object and the color-matched painted board in the third step, the color-matching time can be shortened, excessive production of paint for producing the color-matched painted board can be prevented, and the number of times color matching is required can be reduced.

[0059] (Third embodiment) The repair painting method of this embodiment is a repair painting method for painting an object having a repair area, and includes a first step of mixing paint to be painted on the repair area of ​​the object, a second step of painting the paint onto a color-matched paint board, a third step of visually comparing the color of the color-matched paint board with the color of an area adjacent to the repair area on the object to determine whether to paint the repair area, and a fourth step of block painting the paint prepared in the first step onto the part including the repair area if it is determined in the third step that painting should be done, in which in the third step, a line having a width of 3 mm or more and 5 mm or less is formed on the surface of the object, a color-matched paint board is positioned so that it is in contact with the line, and the color of the object and the color of the color-matched paint board are compared across the line. Block painting is a method of painting specific areas or parts evenly, including the repair area. Since the painting is done evenly, if there is a difference in appearance between the repair area and the adjacent area, the repair area tends to stand out, so more precision in color matching is required compared to blending painting.

[0060] In the first step, similarly to the first embodiment, the color of the paint to be applied to the repaired portion of the object is mixed.

[0061] In the repair painting method of this embodiment, similarly to the first embodiment, it is preferable to carry out step A of measuring the color of the object with a colorimeter before the first step.

[0062] In addition, in the repair painting method of this embodiment, as in the first embodiment, in the first step, it is preferable to input the measurement results obtained in step A into a color matching device using a computer, and to mix the paint based on the obtained data.

[0063] In the second step, similarly to the first embodiment, the paint to be matched in the first step is applied to the matched paint plate.

[0064] In the third step, as in the first embodiment, the color of the toned painted plate is visually compared with the color of the area adjacent to the repaired portion on the object to determine whether to paint the repaired portion.

[0065] In the third step, a line measuring 3 mm to 5 mm wide is formed on the surface of the object, a color-matching plate is placed in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

[0066] In the third step, similarly to the first embodiment, the color is compared using the above-mentioned color comparison method to determine pass / fail. However, the lines 11, 21, and 31 with a width of 3 mm to 12 mm in the above-mentioned color comparison method are replaced with lines with a width of 3 mm to 5 mm to compare the colors. In the visual comparison, if the color-matching worker judges that there will be no sense of incongruity when the color of the color-matching board is painted on the object, the color of the color-matching board is judged as "pass", and if the worker judges that there is a high possibility of incongruity, the color of the color-matching board is judged as "fail". If the result of the judgment is pass, it is judged that the paint used in producing the color-matching board is to be painted on the repaired part. If the result of the judgment is fail, the first to third steps are repeated until the result is pass. When the second or subsequent color matching is performed after failing, the color may be matched based on the paint produced before.

[0067] In the fourth step, if it is decided in the third step that painting should be performed, the paint prepared in the first step is block-painted onto the repaired area. Block painting is a method of painting a specific area or part evenly, including the repair area. Since the painting is done evenly, if there is a difference in appearance between the repair area and the adjacent area, the repair area tends to stand out. Therefore, more precision in color matching is required compared to blending painting.

[0068] In the repair painting method of this embodiment, as in the first embodiment, it is preferable to carry out step B between the second and third steps, or between the third and fourth steps, in which the color-matched painted board prepared in the second step is measured with a colorimeter and the measurement result is compared with the measurement result obtained in step A.

[0069] In addition, in the repair painting method of this embodiment, as in the first embodiment, in step B, it is preferable to input the measurement results obtained by measuring the color-matched painted board into a computer-based color matching device and compare them with the measurement results obtained in step A.

[0070] According to the repair painting method of this embodiment, when comparing the color of the object and the color-matched painted board in the third step, the color-matching time can be shortened, excessive production of paint for producing the color-matched painted board can be prevented, and the number of times color matching is required can be reduced.

[0071] [Manufacturing method for painted items] A manufacturing method for a painted object according to one embodiment of the present invention is a manufacturing method for a painted object in which any portion of an object is painted to produce a painted object, and includes a first step of matching paint to be applied to the object, a second step of applying the paint to a matching paint board, a third step of visually comparing the color of the matching paint board with the color of the object to determine the tone of paint to be applied to the object, and a fourth step of painting the object with paint of the tone determined in the third step. In the third step, a line having a width of 3 mm or more and 12 mm or less is formed on the surface of the object, and a matching paint board is positioned so that it touches the line, and the color of the object and the color of the matching paint board are compared across the line.

[0072] The first step is to mix the paint to be applied to the object. In mixing paint, the paint is mixed to a desired color.

[0073] In the second step, the paint to be mixed in the first step is applied to the mixed-color paint plate. The method for painting the color-matched painted plate is not particularly limited, but examples thereof include methods using a brush, a spray, a paint roller, and the like.

[0074] In the third step, the color of the paint plate is visually compared with the color of the object to be painted to determine the color tone of the paint to be applied to the object.

[0075] In the third step, a line measuring 3 mm to 12 mm wide is formed on the surface of the object, a color-matching plate is placed in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

[0076] In the third step, the colors are compared using the above-mentioned color comparison method. Fig. 5 is a schematic diagram of the third step performed using the above-mentioned color comparison method (second embodiment). 81 A frame 80 is formed that has at least one side having a line 81 that is 3 mm or more and 12 mm or less in width and that is the same size as the toned painted plate 90 produced in the second step. When the color comparison method (first embodiment) is used, a line that is 3 mm or more and 12 mm or less in width is formed in an area adjacent to the repaired part on the surface of the object, and when the color comparison method (third embodiment) is used, two frames that are the same size as the toned painted plate produced in the second step and that contact the area adjacent to the repaired part on the surface of the object via a line that is 3 mm or more and 12 mm or less in width are formed.

[0077] The color of the object 300 is compared with the color of the toning board 90 by visual inspection. If the toning worker judges that there will be no sense of incongruity when the color of the toning board 90 is applied to the object 300 in the visual comparison, the color of the toning board 90 is judged as "passed", and if the worker judges that there is a high possibility that there will be incongruity, the color of the toning board 90 is judged as "failed". If the result of the judgment is a pass, it is judged that the paint used to prepare the color-matched painted board is to be applied to the repaired area. If the result of the judgment is a fail, the first to third steps are repeated until the board passes. When the second or subsequent color matching is performed after a fail, the color may be matched based on the paint previously prepared.

[0078] In the fourth step, if it is decided in the third step that painting is to be performed, the object is painted with paint of the color tone determined in the third step.

[0079] According to the method for producing a coated object of this embodiment, it is possible to prevent the judgment of color match from being too strict when comparing the color of the object and the color-matched plate in the third step. As a result, the number of color matches can be reduced, which in turn makes it possible to shorten the color-matching time and prevent the overproduction of paint for producing the color-matched plate possible. EXAMPLES

[0080] The present invention will be described in more detail below with reference to specific examples, although the present invention is not limited to these examples.

[0081] The color to be mixed was Daihatsu Motor's automotive paint color T29 (Light Rose Mica Metallic II), and three experienced color matchers a to c performed the color matching work.

[0082] <Preparation> An automobile door part coated with electrocoating paint was sanded with #240 paper, degreased, and cleaned, after which a commercially available primer surfacer, "COODE Filler 2 Gray" (product name, a two-component solvent-based urethane primer surfacer for automobile repairs manufactured by Kansai Paint Co., Ltd.) was spray-painted onto the part to a dry film thickness of 60 μm, dried at 60°C for 30 minutes, and then wet-sanded with #400 paper. After water polishing, the commercially available "Retan PGHB Eco" (product name, one-component solvent-based topcoat paint for automobile repair manufactured by Kansai Paint Co., Ltd.) mixed in the primary color ratio of T29 described in "Auto Paint Colors 2017 (issued by the Japan Paint Manufacturers Association)" was spray-painted to a dry film thickness of 15 μm, and after drying to the touch, a commercially available clear "Retan PG Eco Clear-HX (Q)" (product name, two-component solvent-based clear paint for automobile repair manufactured by Kansai Paint Co., Ltd.) was spray-painted to a dry film thickness of 40 μm, and dried at 60 ° C for 20 minutes to obtain a door part painted in the target color. This door part was used as a color sample part for block painting and a color sample and test part for gradation painting, so several similar door parts were produced. In addition, several door parts were also produced that were painted with only primer surfacer and water-polished to be used as test parts for block painting.

[0083] <Color matching work> The starting mix was a mixture that was slightly different in primary color from the commercially available "Retan PGHB Eco" mixed with the primary color ratio of T29 used in the preparation. Three experienced color matchers a to c performed the color match work according to steps 1 to 5 below. Step 1) To match the color of the sample parts, we made a color-matching paint using the primary colors of "Rethan PGHB Eco."

[0084] Step 2) The paint mixed in step 1 was sprayed onto a 200 mm x 80 mm piece of paper in a dry film thickness of 15 μm. After it was dry to the touch, a layer of "Retan PG Eco Clear-HX(Q)" was applied in a dry film thickness of 40 μm and dried at 60°C for 20 minutes to produce a mixed-color painted board.

[0085] Step 3) Using the following color comparison methods 1 to 6, the color of the color sample part was compared with that of the color-matched painted board. If the color matching worker judged that the color of the color-matched painted board would not look out of place when painted onto an object, the color of the color-matched painted board was judged as "passed," and if the worker judged that there was a high possibility of it looking out of place, the color of the color-matched painted board was judged as "failed." (Colorimetric method 1) On the surface of the color sample part, yellow masking tape is used to create a 15mm wide line and two frames measuring 200mm x 80mm on the inside that are connected by the line. A color-matching paint board is placed on one of the frames, and the color inside the frame without the color-matching board is compared with the color of the color-matching paint board. (Colorimetric method 2) Color comparison is performed in the same manner as in color comparison method 1, except that the width of the 15 mm line is changed to 12 mm. (Colorimetric method 3) Color comparison is performed in the same manner as in color comparison method 1, except that the width of the 15 mm line is changed to 9 mm. (Colorimetric method 3-1) Using yellow masking tape, form a frame measuring 200mm x 80mm on the inside with a 9mm wide line on the surface of the color sample part, and place a color-matching paint board on the outside of the frame so that it touches the 9mm wide line, and compare the color inside the frame with the color of the color-matching paint board. (Colorimetric method 3-2) A 9mm wide line is drawn on the surface of the color sample part using yellow masking tape, and a color-matching paint board is placed so that it touches the 9mm wide line, and the color of the color sample part on the other side of the line is compared with the color of the color-matching paint board. (Colorimetric method 4) Color comparison is performed in the same manner as in color comparison method 1, except that the width of the 15 mm line is changed to 5 mm. (Colorimetric method 5) Color comparison is performed in the same manner as in color comparison method 1, except that the width of the 15 mm line is changed to 3 mm. (Colorimetric method 6) A color-matching paint board is placed directly on the surface of the color sample part, and the color of the color sample part is compared with the color of the color-matching paint board.

[0086] Step 4) The paint toned in step 1 was applied to the test parts prepared in the preliminary preparation, and the presence or absence of incongruity was evaluated. For the evaluation of block painting, the paint toned in step 1 was spray-painted on the entire surface of the test parts for block painting with a dry film thickness of 15 μm, and after it was dry to the touch, "Retan PG Eco Clear-HX (Q)" was painted with a dry film thickness of 40 μm, and dried at 60 ° C for 20 minutes to prepare evaluation parts, and the color sample parts and evaluation parts were arranged side by side with a gap of 5 mm, and the colors were compared and evaluated. For the evaluation of gradation painting, the paint toned in step 1 was spray-painted on a part of the color sample and test parts for gradation painting, and after it was dry to the touch, "Retan PG Eco Clear-HX (Q)" was spray-painted on the entire part with a dry film thickness of 40 μm, and dried at 60 ° C for 20 minutes to prepare evaluation parts, and the color of the entire evaluation parts was evaluated. The evaluation criteria are as follows. ○: No discomfort at all. △: If you look closely, there is something a little odd. ×: Feels strange.

[0087] Step 5) Steps 1 to 4 were repeated until all of the colorimetric methods 1 to 6 in step 3 were passed.

[0088] The pass / fail results for step 3 and the evaluation for step 4 are shown in Tables 1 to 3. In the case of color matcher a, the object was already painted with no problems after the second try for gradation painting or the third try for block painting, but in the case of the conventional color comparison method that does not use lines or frames (color comparison method 6), the second and third tries were judged as failing, and a total of four tries were performed. On the other hand, when lines or frames of appropriate widths were formed before color comparison, as in color comparison method 2 to color comparison method 5, the second and third tries were judged as pass, and it is believed that excessive color matching was suppressed. Similarly, in the case of color matchers b and c, by forming lines or frames of appropriate widths before color comparison, it is believed that excessive color matching was suppressed, as it was possible to accurately judge whether or not the object could be painted by making the lines or frames of appropriate widths.

[0089] [Table 1]

[0090] [Table 2]

[0091] [Table 3] [Explanation of symbols]

[0092] 10,50,90 Toning paint board 20,30,40,80 frames 11,21,22,31,32,81 line 100, 200, 300 objects 210 Repaired part

Claims

1. A color comparison method for comparing the color of an object with the color of a color-matched paint plate, comprising the steps of: A color comparison method comprising forming a line having a width of 3 mm to 12 mm on the surface of the object, placing the color-matching plate so as to be in contact with the line, and comparing the color of the object and the color of the color-matching plate across the line.

2. The color comparison method according to claim 1 , wherein the size of the color-matching plate is 100 mm×50 mm or more.

3. 2. The color comparison method according to claim 1, further comprising forming a frame having the line having a width of 3 mm to 12 mm as one side and the same size as the toning plate, positioning the toning plate so as to be in contact with the line having a width of 3 mm to 12 mm, and comparing the color of the object within the frame with the color of the toning plate.

4. 2. The color comparison method according to claim 1, further comprising forming two frames of the same size as the toning plate, the toning plate being in contact with the line having a width of 3 mm to 12 mm, placing the toning plate inside one of the frames, and comparing the color of the object inside the other frame where the toning plate is not placed with the color of the toning plate.

5. A repair painting method for painting an object having a repair part, comprising the steps of: A first step of mixing a paint to be applied to the repaired area; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repaired portion of the object to determine whether to paint the repaired portion; A fourth step of painting the paint prepared in the first step on the repaired portion when it is determined in the third step that painting is to be performed, In the third step, a line having a width of 3 mm to 12 mm is formed on the surface of the object, the color-matching plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

6. A repair painting method for painting an object having a repair part, comprising the steps of: A first step of mixing a paint to be applied to the damaged area of ​​the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repaired portion of the object to determine whether to paint the repaired portion; If it is determined in the third step that painting is to be performed, a fourth step of applying a gradient paint to the repair area using the paint prepared in the first step, In the third step, a line having a width of 5 mm to 12 mm is formed on the surface of the object, the color-matching plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

7. A repair painting method for painting an object having a repair part, comprising the steps of: A first step of mixing a paint to be applied to a repair portion of the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toned paint plate with the color of an area adjacent to the repaired portion of the object to determine whether to paint the repaired portion; If it is determined in the third step that painting is to be performed, a fourth step of block painting the paint prepared in the first step on the part including the repaired portion, In the third step, a line having a width of 3 mm to 5 mm is formed on the surface of the object, the color-matching plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching plate are compared across the line.

8. A step A is carried out before the first step in which the color of the object is measured by a colorimeter; The repair coating method according to any one of claims 5 to 7, wherein a step B is carried out between the second step and the third step or between the third step and the fourth step, in which the toned painted plate produced in the second step is measured by a colorimeter and the measurement result is compared with the measurement result obtained in the step A.

9. 9. The refinish painting method according to claim 8, wherein in the first step, the measurement results obtained in the step A are inputted into a color matching device using a computer, and the paint is matched based on the obtained data.

10. 9. The repair coating method according to claim 8, wherein in the step B, the measurement results obtained by measuring the color-matched painted plate are input into a color matching device using a computer and compared with the measurement results obtained in the step A.

11. A method for producing a coated object by painting an arbitrary portion of an object, comprising the steps of: A first step of mixing a paint to be applied to the object; A second step of applying the paint to a color-matched plate; A third step of visually comparing the color of the toning paint plate with the color of the object to determine the color tone of the paint to be applied to the object; A fourth step of painting the object with a paint having the color tone determined in the third step, In the third step, a line having a width of 3 mm or more and 12 mm or less is formed on the surface of the object, the color-matching paint plate is placed so as to be in contact with the line, and the color of the object and the color of the color-matching paint plate are compared across the line.

Images