Surfacing method and resurfacing method

Abstract

To provide a method for simply surfacing an uneven pattern.SOLUTION: A surfacing method rolls a specific porous roller, and thereby can simply impart foundation unevenness, and then can perform surfacing.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a novel method of surfacing and resurfacing. [Background technology]

[0002] 2. Description of the Related Art Generally, various decorative coating materials are applied to the surfaces of buildings, civil engineering structures, and the like in order to enhance their aesthetic appearance. For example, surface finishing such as forming a concave-convex pattern is performed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-104869 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, Patent Document 1 describes a method in which, after a coating material finishing composition is applied, convex portions of the applied surface are pressed down to finish the surface. In such a method, a coating composition is first applied to provide a basic uneven surface, and then a surface finish is applied.

[0005] However, if the base unevenness is insufficient or the surface finish is not satisfactory, it is necessary to apply the base unevenness again. In this case, a very tedious process is required, such as scraping off the coating material and applying the coating material again to create the base unevenness. [Means for solving the problem]

[0006] The present invention was made in consideration of these problems, and it was discovered that a basic unevenness can be easily imparted by simply rolling a specific porous roller, and that subsequent surface finishing can also be easily carried out, which led to the completion of the present invention.

[0007] That is, the present invention has the following features. 1. (1) A process of applying a decorative coating material to a substrate; (2) A process of rolling a porous roller having a porous layer around a core material and a surface of the porous layer with a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, on the surface of the decorative coating material while the decorative coating material is still in a wet state, to give a basic unevenness to the surface of the decorative coating material; (3) After step (2), a step of performing a surface finishing process using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller; A surface finishing method comprising the steps of: 2. (1´) A process of applying a decorative coating material to a substrate and performing a surface finish; (2) A process of rolling a porous roller having a porous layer around a core material and a surface of the porous layer with a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, on the surface of the decorative coating material while the decorative coating material is still in a wet state, to give a basic unevenness to the surface of the decorative coating material; (3) After step (2), a step of performing a surface finishing process again using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller; A resurfacing method comprising: Effect of the Invention

[0008] The surface finishing method of the present invention can easily provide a surface finish with a textured pattern. [Brief description of the drawings]

[0009] [Figure 1] 2 is an example of a porous roller used in the present invention. [Diagram 2] FIG. 2 is an enlarged view of the surface of the porous layer in FIG. [Diagram 3] 1 is an example of a cross-sectional view in step (2) of the present invention ((1) during rolling of the porous roller, (2) after rolling). [Figure 4] FIG. 2 is a cross-sectional view of the surface finishing in step (3) of the present invention. [Explanation of symbols]

[0010] 1: Core material 2: Reinforcement material 3: Handle shaft 4: Porous layer 5: Handle X: Depression Y: Hole a: Size of the dent b: Distance between depressions A: Base material B: Decorative coating material C: Porous roller DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described.

[0012] The surface finishing method of the present invention comprises the steps of: (1) A process of applying a decorative coating material to a substrate; (2) A process of rolling a porous roller having a porous layer around a core material and a surface of the porous layer with a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, on the surface of the decorative coating material while the decorative coating material is still in a wet state, to give a basic unevenness to the surface of the decorative coating material; (3) After step (2), a step of performing a surface finishing process using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller; The present invention is characterized in that it comprises: According to the surface finishing method of the present invention, basic unevenness can be easily imparted by simply rolling the porous roller, and the subsequent surface finishing can be easily carried out.

[0013] Step (1) of the present invention is a step of applying a decorative coating material to a substrate. The decorative coating material of the present invention is not particularly limited, but examples thereof include those containing a binder and a coloring agent.

[0014] As the binder, for example, acrylic resin, acrylic silicone resin, silicone resin, epoxy resin, urethane resin, fluororesin, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, etc. can be used.

[0015] Examples of coloring materials include color pigments such as titanium oxide, zinc oxide, yellow iron oxide, octavin, titanium yellow, carbon black, graphite, chrome green, cobalt green, ultramarine, Prussian blue, cobalt blue, cobalt violet, molybdate orange, red iron oxide, permanent red, brilliant carmine, lake red, anthraquinone red, perylene red, fast yellow, permanent yellow, isocindolinone yellow, quinophthalone yellow, phthalocyanine green, phthalocyanine blue, and quinacridone violet. Examples of suitable materials include heavy calcium carbonate, kansui stone, light calcium carbonate, white carbon, talc, mica, kaolin, clay, china clay, diatomaceous earth, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica stone powder, quartz powder, resin beads, crushed resin, glass beads, crushed glass, crushed ceramics, crushed ceramics, marble, granite, serpentine, granite, fluorite, kansui stone, feldspar, silica stone, silica sand, and crushed materials thereof, as well as shells such as scallops, abalone shells, turban shells, and surf clams, coral, wood, charcoal, activated carbon, and crushed materials thereof, or materials having their surfaces colored and coated thereon, and any combination of two or more of these may be used.

[0016] The mixing ratio of the binder and colorant in the decorative coating material of the present invention is preferably 50 to 3,000 parts by weight (more preferably 100 to 2,000 parts by weight) of colorant per 100 parts by weight of solids of the binder.

[0017] In addition, the decorative coating material of the present invention preferably uses a coloring material having a size of 2 μm or more and less than 2 mm (preferably 5 μm or more and 1 mm or less). A coloring material of this size is visibly granular on the coating film surface, can form a unique design, can easily enter the depressions of the porous roller, and can easily rise up when the porous roller is rolled, making it easy to impart basic unevenness. The coloring material of the present invention includes a single coloring material, an aggregate of a coloring material, and a colored resin powder or gel body composed of a coloring material and a resin. In particular, in the present invention, it is preferable to use a coloring material that includes a single coloring material or an aggregate of a coloring material, but does not include a colored resin powder or gel body. The size of the colorant refers to the maximum diameter when the colorant is placed stably on a horizontal surface and observed from above. The maximum diameter here can be calculated by multiplying the maximum distance from the center of gravity of the shape by two. In addition, the present invention may contain coloring materials with sizes of less than 2 μm and coloring materials with sizes of 2 mm or more, but it is preferable that the coloring materials with sizes of less than 2 μm or coloring materials with sizes of 2 mm or more be 10% by mass or less of the total coloring materials contained in the decorative coating material, and more preferably 0% by mass or more and 5% by mass or less.

[0018] In addition, the decorative coating material may contain other additives such as hardeners, solvents, dispersants, viscosity adjusters, film-forming aids, thickeners, defoamers, leveling agents, anti-settling agents, anti-sagging agents, plasticizers, preservatives, anti-mold agents, anti-algae agents, antibacterial agents, humectants, drying adjusters, dehydrating agents, matting agents, antifreeze agents, UV absorbers, antioxidants, light stabilizers, and the like, and is not particularly limited to water-based, solvent-based, etc.

[0019] Examples of the substrate include substrates that constitute buildings and civil engineering structures, such as gypsum board, plywood, concrete, mortar, brick, porcelain tile, fiber-mixed cement board, cement calcium silicate board, slag cement perlite board, ALC board, siding board, extrusion molding board, steel board, plastic board, etc. The surfaces of these substrates may be subjected to some kind of surface treatment (e.g., painting with a sealer, surfacer, filler, putty, etc.), or the substrate itself may have irregularities.

[0020] In step (1), the decorative coating material can be applied using a coating tool such as a trowel, a brush, a spatula, a roller, a spray, a gun, etc. The surface shape of the decorative coating material formed in step (1) is not particularly limited, and the surface may be smooth or uneven.

[0021] The decorative coating material used in the present invention can also be a combination of two or more different color coating materials (hereinafter referred to as decorative coating material A and decorative coating material B). For example, the coating can be performed by (1) applying decorative coating material A and then applying decorative coating material B to the entire or part of the surface of decorative coating material A, or (2) simultaneously applying decorative coating material A and decorative coating material B.

[0022] The amount of decorative coating material applied is 1kg / m 2 or more, 1.5kg / m 2 More than 10kg / m 2 It is preferable that the thickness is within such a range. By setting the thickness within such a range, sufficient base unevenness can be imparted.

[0023] In the process (2) of the present invention, while the decorative coating material is in a wet state, a porous roller having a porous layer around a core material, the surface of the porous layer having a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, is rolled on the surface of the decorative coating material to impart basic irregularities to the surface of the decorative coating material. Note that in the present invention, "the decorative coating material is in a wet state" means that the decorative coating material is in a fluid state. Step (2) is a step of providing a basic unevenness of the uneven pattern that will be the basis for the surface finish of the uneven pattern in step (3). As shown in Fig. 3, a porous roller is rolled to raise the convex parts of the basic unevenness, and the necessary unevenness can be provided for the uneven pattern. In this method, the convex parts are raised to provide the basic unevenness, so that even if the decorative coating surface has no unevenness or only a small degree of unevenness, a basic unevenness with sufficient unevenness can be provided. Therefore, there is no need for a step of scraping off the coating material once and applying the coating material again, as in the conventional method. In contrast, for example, a pattern roller can form recesses to impart unevenness, but it is difficult to raise protrusions, and is therefore unsuitable for imparting the basic unevenness of the present invention.

[0024] The porous roller of the present invention, for example as shown in FIG. 1, has a porous layer on the outer surface of a cylindrical core material, and the cylindrical core material is hollow so that a handle with a shaft can be attached, and the roller can be used by attaching a handle shaft to the hollow.

[0025] The cylindrical core material is not particularly limited, and for example, a core material made of plastic, wood, paper, metal, etc. can be used. In order to increase the adhesion between the handle shaft and the core material, a reinforcing material made of, for example, plastic, rubber, glass, metal, fiber, etc. can be used between the handle shaft and the core material.

[0026] The porous roller of the present invention has a plurality of independent depressions on its surface (the surface of the porous layer constituting the porous roller). "Independent depressions" refer to depressions that exist on the surface of the porous layer and are separated from each other by the porous material of the porous layer.

[0027] The shape of each depression, when viewed from the surface of the porous roller, is not particularly limited and may be, for example, a circle, an ellipse, a triangle, a square, a hexagon, a polygon, or the like.

[0028] The size of each depression, as viewed from the surface of the porous roller, is 2 mm to 30 mm, more preferably 3 mm to 25 mm, even more preferably 5 mm to 20 mm, particularly preferably 7 mm to 18 mm, and most preferably 9 mm to 15 mm. By using such a size, the basic unevenness can be easily obtained. The size of the depression can be calculated by multiplying the maximum distance from the center of gravity of each shape by two. For example, in the case of a circle, it can be calculated by the diameter; in the case of an oval, it can be calculated by the major axis; in the case of an equilateral triangle, where L is the length of one side, it can be calculated by L cos30° × 4 / 3; in the case of a regular quadrangle, it can be calculated by the length of the diagonal; and in the case of a regular hexagon, it can be calculated by the diameter of the circumscribing circle.

[0029] The shape and size of the depressions refer to the shape and size on the surface of the porous roller.

[0030] Furthermore, the total area of ​​depressions on the surface of the porous roller (the sum of the areas of the depressions) is preferably 10% or more and 80% or less, more preferably 12% or more and 70% or less, even more preferably 15% or more and 60% or less, particularly preferably 20% or more and 50% or less, and most preferably 25% or more and 45% or less, of the area of ​​the entire roller surface (the area of ​​the outer peripheral surface of the roller).

[0031] The percentage (%) of the total area of ​​the depressions on the surface of the porous roller can be calculated by dividing the total area of ​​the depressions by the surface area of ​​the roller (width of the roller x circumference of the roller surface). For example, if the depressions are uniform in size and circular, the percentage can be calculated by (area of ​​circle x number) / (surface area of ​​the roller) x 100. If the shapes are random, a development of the roller surface can be created and the total area of ​​the depressions can be calculated from the development.

[0032] The depth of the depression is 3 mm or more, more preferably 3 mm to 25 mm, even more preferably 4 mm to 20 mm, and particularly preferably 5 mm to 18 mm. The shape in the depth direction is not particularly limited, but if the surface shape is circular, it is preferable to use a shape that is the same in the depth direction, such as a cylinder, or a shape that decreases in size in the depth direction, such as a cone or a truncated cone. The depth of the depression may be the same as the thickness of the porous layer, or may be smaller than the thickness of the porous layer. The depth of the depression is the distance from the surface of the porous roller to the deepest part that is farthest away.

[0033] The porous roller used in the present invention has a plurality of such depressions. The arrangement of the depressions may be random or regular. In the present invention, it is preferable that the depressions are arranged regularly. For example, when viewed from the surface of the porous roller, a roller in which large and small circles are alternately arranged, a roller in which circles and triangles are alternately arranged, a roller in which the interval between circle A and circle B and the interval between circle B and circle C are different, and a roller in which circles A, B, and C are regularly arranged are also examples of the roller in which the depressions are regularly arranged.

[0034] In the present invention, it is particularly preferred that recesses having uniform size and / or shape are regularly arranged, and that such recesses are preferably arranged at equal intervals.

[0035] As shown in Fig. 2, the porous roller used in the present invention preferably has a distance (b) between adjacent depressions (b / a) of 1.05 to 3.0 times (or more preferably 1.1 to 2.8 times, or even more preferably 1.2 to 2.6 times) the size of the depression (a). By arranging the depressions regularly at such intervals, there is no bias in the design due to the depressions, and it is easy to obtain a more excellent pattern design. The distance (b) between adjacent depressions refers to the distance between the centers of gravity of each depression shape.

[0036] The method for producing a porous layer having a plurality of depressions is not particularly limited, but it can be produced by applying heat to a part of a porous layer without depressions to melt the part, cutting it out with a cutter or drill, or molding it in a mold, so as to have a predetermined size and shape. In addition, the depressions may be formed in the porous layer before the porous layer is attached to the cylindrical core material, or the depressions may be formed in the porous layer after the porous layer is attached to the cylindrical core material. Such a porous roller having a plurality of depressions can be attached to a handle shaft for use.

[0037] The porous roller used in the present invention is preferably a roller having a sponge-like porous layer. The porous layer is not particularly limited to a porous layer having interconnected pores or a porous layer having independent pores. An independent pore is one in which a membrane-like thing is present between the pores, and each pore is independent, whereas an interconnected pore is one in which there is no membrane-like thing separating the pores, and the pores are interconnected. In the present invention, a porous layer having interconnected pores is preferred.

[0038] The size of the pores in the porous layer is smaller than the size of one depression, and is 0.5 mm to 10 mm, more preferably 0.7 mm to 8 mm, even more preferably 1 mm to 6 mm, and most preferably 1.2 mm to 5 mm. The size of the pores can be calculated by multiplying the maximum distance from the center of gravity of each pore by 2. The size of the pores can be determined, for example, from the open pores on the surface or cut surface. The size of the pores is the average value calculated from 10 locations.

[0039] The material for the porous layer is not particularly limited, but examples thereof include resins such as acrylic resin, urethane resin, ester resin, and ethylene resin, which are made porous like a sponge.

[0040] The thickness of the porous roller (porous layer) is preferably 3 mm or more, more preferably 3 mm or more and 25 mm or less, even more preferably 4 mm or more and 20 mm or less, and particularly preferably 5 mm or more and 18 mm or less. With such a thickness, the basic unevenness can be easily imparted. The thickness of the porous roller was measured at a cross section of the porous layer at a location that did not have any depressions.

[0041] The width (length) of the porous roller is not particularly limited, but is preferably about 80 mm or more and 250 mm or less, and the diameter (cylinder diameter) of the porous roller (including the porous layer) is preferably about 15 mm or more and 100 mm or less.

[0042] By using such a porous roller to roll the surface of the decorative coating material obtained in step (1), the basic unevenness can be easily imparted. In the present invention, the porous roller can be rolled as it is, or the surface of the porous roller can be wetted with water or a solvent, or the surface of the porous roller can be wetted with a decorative coating material. The decorative coating material used in this case can be the same as the decorative coating material applied, or it can be different. If the size of each depression in the porous roller is too small or the depth is less than 3 mm, it is difficult to make the convex parts of the base unevenness stand up. Also, if the size of each depression is too large, it is difficult to make the convex parts of the base unevenness stand up.

[0043] The height difference between the convex and concave portions of the basic unevenness in step (2) (hereinafter also referred to as the “convex-concave difference”) is not particularly limited, but is preferably 1.5 mm or more, more preferably 2 mm or more and 8 mm or less, and even more preferably 2.5 mm or more and 6 mm or less. The height difference is a value calculated from the average height difference (average of 10 randomly selected points) from the bottom surface of the concave portion to the apex of the convex portion.

[0044] Step (3) of the present invention is a step of performing a textured surface finish after step (2) using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller. Step (3) is a step of performing final surface finishing (forming a textured pattern) on the basic texture obtained in step (2). Examples of final surface finishing include surface finishing that smooths out only the convex parts of the base irregularities, surface finishing that presses the convex parts of the base irregularities, and surface finishing that wipes off, scratches, shifts, drags, etc., part of the base irregularities.

[0045] The unevenness of the finished surface in step (3) is not particularly limited, but is preferably 1 mm or more, more preferably 1.5 mm or more and 6 mm or less, and even more preferably 2 mm or more and 5 mm or less.

[0046] In the present invention, after the step (1') of applying a decorative coating material and performing a surface finish, the step (2) can be carried out again to provide a base unevenness. Step (1') includes, for example, a surface finish applied by the method of step (3) above, or a surface finish applied by a method different from the steps of the present invention. In the present invention, when the surface finish in step (1') is insufficient, when the surface finish is not satisfactory, or when it is desired to change the shape of the surface finish, the surface finish can be easily redone if the decorative coating material is not in a wet state.

[0047] In the present invention, in step (2), the convex parts are raised to provide a basic unevenness, so that the basic unevenness can be provided again by simply rolling the porous roller without scraping off the decorative coating material. Furthermore, the surface can be easily finished in step (3).

[0048] In the present invention, after step (3), a top coat can be applied to the entire surface or a part of the finished surface. EXAMPLES

[0049] In order to clarify the effects of the present invention, examples and comparative examples will be given below. The following decorative coating material 1 was prepared as the decorative coating material. Decorative coating material 1: 200 parts by weight of acrylic resin emulsion (solid content 50% by weight), 300 parts by weight of colored silica sand (white) (particle size 0.5mm to 0.7mm), 300 parts by weight of colored silica sand (black) (particle size 0.5mm to 0.7mm)

[0050] As the porous rollers, rollers 1 to 20 shown in Table 1 were prepared.

[0051] [Table 1]

[0052] Example 1 A 900mm x 900mm slate board (substrate) is sprayed with a spray gun at a rate of 4.0kg / m 2 The decorative coating material was sprayed onto the surface, obtaining a decorative coating surface with a concave-convex difference of 1.0 mm. Next, while the decorative coating material was still wet, a porous roller 1 was rolled over it to give a basic unevenness with an unevenness difference of 3.5 mm to the surface of the decorative coating material. The uneven surface was then smoothed out with a trowel, and a surface finish with a difference in unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0053] Example 2 Surface finishing was carried out in the same manner as in Example 1, except that porous roller 2 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0054] Example 3 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 3 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0055] Example 4 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 4 was used. As a result, a basic unevenness of 3.4 mm was created, and a surface finish with an unevenness of 3.1 mm was easily achieved (Figure 4 (3)).

[0056] Example 5 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 5 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0057] Example 6 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 6 was used. As a result, a basic unevenness of 3.1 mm was created, and a surface finish with an unevenness of 2.8 mm was easily achieved (Figure 4 (3)).

[0058] Example 7 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 7 was used. As a result, a basic unevenness of 3.1 mm was created, and a surface finish with an unevenness of 2.8 mm was easily achieved (Figure 4 (3)).

[0059] Example 8 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 8 was used. As a result, a basic unevenness of 3.4 mm was created, and a surface finish with an unevenness of 3.1 mm was easily achieved (Figure 4 (3)).

[0060] Example 9 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 9 was used. As a result, a basic unevenness of 3.2 mm was created, and a surface finish with an unevenness of 2.9 mm was easily achieved (Figure 4 (3)).

[0061] Example 10 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 10 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0062] Example 11 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 11 was used. As a result, a basic unevenness of 3.4 mm was created, and a surface finish with an unevenness of 3.1 mm was easily achieved (Figure 4 (3)).

[0063] Example 12 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 12 was used. As a result, a basic unevenness of 2.8 mm was created, and a surface finish with an unevenness of 2.5 mm was easily achieved (Figure 4 (3)).

[0064] (Example 13) Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 13 was used. As a result, a basic unevenness of 3.1 mm was created, and a surface finish with an unevenness of 2.8 mm was easily achieved (Figure 4 (3)).

[0065] Example 14 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 14 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0066] Example 15 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 15 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0067] Example 16 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 16 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0068] (Example 17) Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 17 was used. As a result, a basic unevenness of 3.5 mm was created, and a surface finish with an unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0069] (Example 18) Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 18 was used. As a result, a basic unevenness of 3.4 mm was created, and a surface finish with an unevenness of 3.1 mm was easily achieved (Figure 4 (3)).

[0070] Comparative Example 1 Surface finishing was carried out in the same manner as in Example 1, except that a porous roller 19 was used. The resulting surface unevenness was less than 0.5mm, making surface finishing difficult.

[0071] Comparative Example 2 The surface was finished in the same manner as in Example 1, except that the roller 20 was used. The resulting surface unevenness was less than 0.5mm, making surface finishing difficult.

[0072] (Example 19) By rolling the basic uneven surface with an unevenness difference of 0.5 mm or less obtained in Comparative Example 1 while the decorative coating material was still wet, a porous roller 1 was rolled over it, and it was possible to recreate a basic unevenness with an unevenness difference of 3.5 mm on the surface of the decorative coating material. The uneven surface was then smoothed out with a trowel, and a surface finish with a difference in unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0073] (Example 20) By rolling the basic uneven surface with an unevenness difference of 0.5 mm or less obtained in Comparative Example 2 while the decorative coating material was still wet, a porous roller 1 was rolled over it, and it was possible to recreate a basic unevenness with an unevenness difference of 3.5 mm on the surface of the decorative coating material. The uneven surface was then smoothed out with a trowel, and a surface finish with a difference in unevenness of 3.2 mm was easily achieved (Figure 4 (3)).

[0074] Example 21 Using the same method as in Example 1, a decorative coating surface with a concave-convex difference of 1.0 mm was obtained. Next, while the decorative coating material was still wet, a porous roller 1 was rolled over it to create a basic unevenness with an unevenness difference of 3.5 mm on the surface of the decorative coating material. The resulting basic uneven surface was then smoothed out using a brush to create a surface finish that included uneven areas with a difference in height of 3.2 mm and minute unevenness with a difference in height of 0.2 mm formed on the uneven areas (Figure 4 (4)).

Claims

1. (1) A step of applying a decorative coating material to a substrate; (2) A process of rolling a porous roller having a porous layer around a core material and a surface of the porous layer with a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, on the surface of the decorative coating material while the decorative coating material is still in a wet state, to impart a basic unevenness to the surface of the decorative coating material; (3) After step (2), a step of performing a surface finishing process using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller; A surface finishing method comprising the steps of:

2. (1') A process of applying a decorative coating material to a substrate and performing a surface finish; (2) A process of rolling a porous roller having a porous layer around a core material and a surface of the porous layer with a plurality of independent depressions, each depression having a size of 2 mm to 30 mm and a depth of 3 mm or more, on the surface of the decorative coating material while the decorative coating material is still in a wet state, to impart a basic unevenness to the surface of the decorative coating material; (3) After step (2), a step of performing surface finishing again using one or more surface finishing tools selected from a trowel, a brush, a spatula, and a roller; A resurfacing method comprising:

Images