JP3340419B2 - Building board and surface decoration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building board and a surface decorative device, and more particularly to a building plate having a surface provided with an uneven pattern and a decorative coating, and a surface decorative device suitable for manufacturing the building plate. .

[0002]

2. Description of the Related Art An architectural board having an uneven pattern and a decorative coating on its surface is formed, for example, by embossing the surface of a plastic plate formed by extrusion molding or the like to form an uneven pattern. The plastic plate is cured and cured to form a substrate,
Further, the substrate is manufactured by sequentially applying processes such as back seal coating on the back surface, undercoating, intermediate coating, and top coating on the front surface, decorative coating on the front surface, and clear coating. In the topcoating step, for example, sand-painting may be applied in order to express the natural texture and texture of natural stone.

Japanese Patent Application Laid-Open No. 7-112420 describes a manufacturing apparatus and a manufacturing method of a patterned extruded body having an embossing roll for pressing a surface of the extruded body to give a pattern to the surface of the extruded body. Have been. Further, Japanese Unexamined Patent Publication No.
Japanese Patent Publication No. 258021 discloses an apparatus in which an embossing roll is pressed against an inorganic plate extruded from a mold to pattern the surface of the inorganic plate.

[0004] Japanese Patent Application Laid-Open No. 2000-16885 describes a method of applying a lysine-like surface makeup to a fiber-reinforced cement board. Furthermore, this publication discloses that by adding a coloring pigment to the compounding material of the fiber reinforced cement board and coloring the base material itself, it is possible to obtain a complex combination of colors together with the color of the colored particles attached to the surface. Is described.

[0005] The present applicant discloses in Japanese Patent No. 2543840 that after applying lysine coating to the entire surface of an inorganic plate having an uneven pattern on the surface, the lysine coating film adhered to the projections is scraped off by a reverse roll. A method of obtaining an inorganic plate in which lysine coating is applied only to concave portions on the surface of the inorganic plate has been proposed.

Further, the applicant of the present invention has disclosed in Japanese Patent No. 2784529 that a plurality of sets of ink jet type coating heads are used to apply different colors of paint to the surface of a concave portion of a building board in a spot-like manner, so that different colors of paint can be obtained. A painting method is proposed in which a mixed blurred color pattern is revealed.

[0007]

However, in a building board provided with a concavo-convex pattern and a decorative coating, it was not possible to develop a feeling of minute concavities and convexities only at the bottom of the concave portion. Further, in the conventional surface decoration device for manufacturing a building board, there is a problem that the manufacturing cost of the building board is inevitably high because a plurality of painting steps are required following the uneven patterning step.

[0008] The present invention has been made in view of such problems, and a surface makeup device capable of simultaneously forming a concavo-convex pattern and decorative painting, and a unique design by applying the surface makeup device. An object is to provide a building board that has exhibited effects.

[0009]

According to the construction board of the present invention, on the surface of a cement substrate, a convex portion which is located at the uppermost position and is located substantially on a plane and a concave portion which is located below the convex portion are provided. And a bottom portion at the lowest position of the concave portion is colored with a pigment-containing ink containing a pigment for coloring, a granular material for imparting design, and a resin for fixing as components. The portion of the recess other than the bottom portion is in a state where the cement substrate is visible.

[0010] Further, the granular mixed ink is engraved in a mesh shape, thereby improving the sharpness of the colored portion. In addition, since the resin has reactivity with a cement alkali component, the resin can improve riding on a cement substrate. Further, since the cement substrate has a pigment for coloring as a whole, it can be made inconspicuous even if scratched.

[0011] Further, the surface decoration device of the present invention includes an embossing roll for embossing a surface of a building board, a first ink supply device for supplying a first ink to a concave portion of the embossing roll, and the embossing roll. And a second ink supply device for supplying the second ink to the convex portions of the second ink supply device.

Further, by providing a release agent supply device for supplying the release agent to the embossing roll, it is possible to prevent the molding material from adhering to the embossing roll (the mold release is improved). Further, the first ink supply device can have a fine and arbitrary print pattern by having an inkjet head.

Further, the second ink supply device has a transfer roll that comes into contact with the convex portion of the embossing roll, so that ink can be selectively supplied only to the convex portion of the embossing roll easily. In addition, the protrusion of the embossing roll has a groove suitable for holding the second ink on the surface thereof, so that the ink can be surely held.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
FIG. 2 is a view for explaining the structure of the surface makeup apparatus according to the present invention. The surface makeup apparatus 1 includes an embossing roll 4 disposed so as to abut on a surface of a plastic plate (formed body) S conveyed by a conveying belt 3 on a conveying base 2, and the embossing roll 4 is formed of a plastic plate. A roll rotation drive device (not shown) for rotating and driving in synchronization with the movement of the state body S, a release agent supply device 10, a first ink supply device 20, a second ink supply device 30, a cleaning unit 40.

The plastic plate S is extruded by an extruder (not shown). The molding material of the plastic plate-shaped body S is a cement compound (cement kneaded material) containing cement as a main component, and a material mixed with a pigment is used. A pigment is prepared according to the base color of the building board that will be the product. The plastic plate S may be manufactured by a method other than extrusion molding.

A roll rotation driving device (not shown) controls the rotation speed of the embossing roll 4 in accordance with the conveying speed of the plastic plate S while moving the embossing roll 4 in the conveying direction of the plastic plate S (in FIG. 1). Rotate clockwise). In some cases, it is also possible to rotate the embossing roll 4 by using the conveying force of the plastic plate S without using the rotation driving device.

On the peripheral surface of the embossing roll 4, a plurality of convex portions 4 are provided.
a is formed. The concave portion Sa is formed on the surface of the plastic plate S by the convex portion 4a. A concave portion (outer peripheral surface on which the convex portion 4a is not formed) 4b of the embossing roll 4 forms a convex portion Sb on the surface of the plastic plate S. All the protrusions Sb are generally located substantially on a plane. Actually, the position of the convex portion 4a formed on the peripheral surface of the embossing roll 4 corresponding to the uneven pattern formed on the surface of the plastic
The shape is set. In the present embodiment, an embossing roll 4 coated with a urethane resin is used.

A rotary pulse encoder 5 is provided on a shaft portion of the embossing roll 4 to detect a rotation angle of the embossing roll 4. The rotation angle signal 5a output from the rotary pulse encoder 5 is supplied to the control unit 22 in the first ink supply device 20.

The release agent supply device 10 includes the spray head 1
1, a release agent supply tank (not shown), a release agent supply path for supplying the release agent from the release agent supply tank to the spray head 11, and injection of the release agent from the spray head 11 are controlled. And a control unit. The release agent supply device 10 sprays a predetermined amount of the release agent onto the surface of the embossing roll 4 via the spray head 11 to adhere (spray) the release agent on the surface of the embossing roll 4. By applying the release agent to the spray, the release agent is applied to the surface of the embossing roll 4 in the form of droplets. In FIG. 1, the release agent in the form of a droplet attached to the surface of the embossing roll 4 is schematically indicated by a mark (open circle).

An emulsion containing a fatty acid as a main component is used as a releasing agent. This prevents adhesion of the coloring agent (ink) to be subsequently applied to the surface of the embossing roll 4. The release agent is applied at a position downstream of the cleaning unit 40 and upstream of the first ink supply device 20 with respect to the rotation direction of the embossing roll 4. Since the ink and the like remaining on the surface of the embossing roll 4 are removed by the cleaning unit 40 (because the surface of the embossing roll 4 is cleaned), the processing in which the release agent is first applied to the embossing roll 4 is performed. Becomes

The first ink supply device 20 includes an ink ejection section 21, a control section 22, and an ejection pattern data storage section 2.
3 and a point ink supply tank (not shown) and a point ink supply path for supplying ink from the point ink supply tank to the ink ejecting unit 21.

The ink jetting section 21 includes a plurality of sets of ink jet heads each having a plurality of ink jet heads arranged at predetermined intervals in the longitudinal direction of the embossing roll 4. In the present embodiment, three sets of inkjet heads are provided. Thereby, three point color inks (aqueous) can be applied to arbitrary positions on the surface of the embossing roll 4. In FIG.
Point color inks applied in the form of dots on the surface of the embossing roll 4 are schematically indicated by black circles. This point color ink is transferred to the protruding portion Sb region of the plastic plate S.

The ejection pattern data storage unit 23 previously stores the data of the ejection pattern of the point color ink. The injection pattern data storage unit 23 is configured using a semiconductor memory. The injection pattern data storage unit 2
3 may be configured using a magnetic recording device or the like. The control unit 22 determines the rotation position of the embossing roll 4 based on the rotation angle signal 5a supplied from the rotary pulse encoder 5, and controls the ejection operation of the ink ejection unit 21 based on the ejection pattern data corresponding to the rotation position. Control. The control unit 22 is configured using a microcomputer system.

In the present embodiment, the ink ejecting section 21 is disposed almost directly above the embossing roll 4, and
The point color ink is supplied at almost the uppermost position of.
Note that the point color ink supply position may be any other position as long as it is downstream of the release agent supply device 10.

The second ink supply device 30 includes a transfer roll 31, an applicator roll 32, and an ink recovery bus 3.
3, and the doctor knife 34, not shown below,
A colored particle-mixed ink supply tank; an ink supply path for supplying the colored particle-mixed ink from the colored particle-mixed ink supply tank to the applicator roll 32; An ink return mechanism for returning the ink to the body-mixed ink supply tank, an ink stirring mechanism for stirring the ink in the ink supply tank containing the colored particles, and the like are provided.

The embossing roll 4 via the transfer roll 31
Is transferred to the bottom of the concave portion Sa of the plastic plate-like body S. The transfer roll 31 used is coated with urethane rubber. The hardness of the urethane rubber is 60 degrees to 75 degrees. The transfer roll 31 is arranged such that the urethane rubber-coated portion comes into contact with the surface of the convex portion of the embossing roll 4. Further, an applicator roll 32 is arranged so as to be in rolling contact with the transfer roll 31. Transfer roll 31 and applicator roll 3
An ink recovery bus 33 is provided below the ink collection bus 2.

As the ink mixed with colored particles, for example, a coloring agent prepared by mixing a resin having reactivity with a cement alkali component, a granular material, and a pigment, such as a vinyl acetate acrylate emulsion resin, is used. For example, 30 to 50% of an acrylic vinyl acetate resin emulsion, 5 to 20 pigments (eg, red iron oxide, iron black, iron oxide yellow, complex oxide green pigment)
%, Additives (penetrants, thickeners, dispersants, defoamers, etc.) 5
A mixture of an emulsion paint prepared at a ratio of 20% to 20% and water at a ratio of 20% to 30% and a predetermined amount of a granular material such as sand or plastic beads is used. Granules such as sand and plastic beads having a typical diameter of 0.1 to 2.0 mm are used. The viscosity of the ink containing the colored particles is 0.02 to 0.0
Adjust to 3 Pa · s. Then, the components and the viscosity are adjusted so that the ink of 50 to 600 g / m ² is transferred to the surface of the convex portion of the embossing roll 4. In the present embodiment, the colored-particle-mixed ink is toned to a bottom color corresponding to the “mortar joint”.

In the ink supply tank (not shown), the ink mixed with the colored particles is agitated so as not to be entrained by air to prevent sedimentation of the particles.
Then, the ink containing the colored particles is supplied to the applicator roll 32 using a pump or the like (not shown). The untransferred ink on the surface of the transfer roll 31 is transferred to the doctor knife 3.
4 collects the ink in the ink collection bus 33. The collected ink is returned to the ink supply tank containing the colored particles.

The cleaning section 40 includes a cleaning roll 41, a doctor knife 42, and a collection bath 43. The cleaning roll 41 is formed of a flexible material such as a sponge. This cleaning roll 41
Are arranged so as to contact the convex portion 4a and the concave portion 4b of the embossing roll 4. The untransferred treatment agent remaining on the surface of the embossing roll 4 is transferred and removed by the cleaning roll 41, and the untransferred treatment agent transferred to the cleaning roll 41 is collected in the collection bath 43 by the doctor knife 42.

FIG. 2 is a view for explaining the structure of the embossing roll. FIG. 2A is a perspective view of an embossing roll, and FIG.
FIG. 2B is an enlarged view of a protrusion of the embossing roll, and FIG. 2C is an enlarged cross-sectional view showing a structure of a groove formed on the surface of the protrusion of the embossing roll.

As shown in FIG. 2B, a large number of grooves (irregular portions) are formed in a mesh on the surface of the convex portion 4a of the embossing roll 4. Thereby, the ink mixed with the colored particles transferred to the surface of the convex portion 4a of the embossing roll 4 can be reliably held. In the present embodiment, this groove is formed by laser processing. 75 per inch
There are provided up to 85 grooves. Groove depth is 100-150μ
m. In this manner, by forming a large number of grooves (irregular portions) on the surface of the convex portion 4a of the embossing roll 4, it is possible to ensure the holding power of the ink mixed with the colored particles transferred to the surface of the convex portion 4a of the embossing roll 4. .

The mesh-shaped grooves (concavo-convex portions) are to be imprinted on the bottoms of the concave portions Sa formed in the plastic plate-like body S. This makes it difficult to visually identify the mesh shape. On the other hand, by forming a mesh-shaped groove (concavo-convex portion) in the concave portion Sa of the plastic plate-like body S, a deep coloring effect can be exhibited.

FIG. 3 is a diagram for explaining a specific example of the ink ejecting section. The ink ejecting unit 21 shown in FIG. 3 includes three sets of inkjet heads P (front),
C (center) and B (rear). In each of the ink jet heads P, C, and B, a plurality of ink jet nozzles are arranged in the longitudinal direction of the embossing roll 4 at a pitch of, for example, 2 mm. The ink jet heads P, C, and B are arranged close to each other, and the ink ejection direction is directed to the rotation center point of the embossing roll 4.

FIG. 4 is a diagram for explaining an example of a colored region on the surface of the embossing roll and an example of a method of designating the colored region. FIG. 4 shows a state where the surface of the embossing roll 4 is developed. The coloring area and color of the embossing roll surface are set based on the surface decorative design of the building board.
Symbols CA1, CA2, and CA3 denote each colored area, and symbol L1
Ln to Ln + 3 are line numbers of virtual coloring lines,
1 to Mm indicate the nozzle numbers of the inkjet head.

Each of the coloring areas CA1, CA2, and CA3 is divided into virtual coloring lines L1 to Ln + 3, and the nozzle numbers M1 to Mm of the inkjet head corresponding to the coloring areas are assigned to each of the virtual coloring lines L1 to Ln + 3. Ask. Each colored area CA1,
The ink jet heads P, C, and B that can supply the colors to be colored are designated corresponding to the colors to be colored in CA2 and CA3.

In this manner, each of the virtual coloring lines L1 to L1
Generating ejection pattern data indicating the correspondence between the inkjet heads P, C, and B used for each Ln + 3 and the nozzle numbers M1 to Mm of the inkjet heads that perform ink ejection;
The generated injection pattern data is stored in the injection pattern data storage unit 23 shown in FIG.

The resolution in the vertical direction (the direction of rotation of the embossing roll 4), that is, the virtual coloring line L1
The interval Ln + 3 is determined by the rotation speed of the embossing roll 4 and the on / off speed of the nozzles of the inkjet head. The resolution in the horizontal direction (the longitudinal direction of the embossing roll 4), that is, the resolution on the virtual coloring lines L1 to Ln + 3 is determined by the arrangement pitch of the nozzles of the inkjet head.

FIG. 5 is a diagram for explaining the relationship between the ejection repetition cycle of the ink jet head and the interval between virtual coloring lines. Assuming that the ejection repetition cycle of the inkjet head (nozzle) is Δt, ink ejection to the virtual coloring line L1 is performed by the first ink ejection, and ink ejection to the virtual coloring line L2 is performed by the next ink ejection. The interval, that is, the line-to-line distance is a product Rω of the diameter R of the embossing roll 4 and the rotation speed ω of the embossing roll 4. In other words, the movement amount of the peripheral surface of the embossing roll 4 during the injection repetition period Δt is the distance between the virtual coloring lines.

FIG. 6 is a view for explaining an example of the ejection pattern data. In the ejection pattern data, an inkjet head used for each virtual coloring line number and a nozzle number for performing ink ejection are associated with each other. The ejection pattern data shown in FIG. 6 is obtained by coloring the coloring area CA1 shown in FIG.
2 shows a case in which No. 2 is colored using an inkjet head C.

The injection pattern data is automatically generated by a color simulation using a personal computer or the like. Specifically, image data obtained by imaging the surface of the plastic plate-shaped body S on which the concavo-convex pattern is formed by the embossing roll 4 with a digital color camera or the like is taken into a personal computer, and formed on the surface of the plastic plate-shaped body S. The regions of the recessed portions Sa and the projected portions Sb are identified and extracted by digital image processing. Furthermore, a paint pattern is drawn on the digital image of the surface of the plastic plate-shaped body S, and the design (shape and color of the decorative pattern) is examined to determine a desired design. Then, the digital image whose design has been determined is divided into regions set based on the intervals of the virtual coloring lines and the arrangement pitch of the inkjet heads, and the nozzle numbers for ejecting ink for each virtual coloring line are obtained. , And generates injection pattern data.

The control unit 22 shown in FIG. 1 obtains the rotation position of the embossing roll 4 based on the rotation angle signal 5a output from the rotary pulse encoder 5, and determines the line that can be colored by each of the ink jet heads P, C, and B. Correspond with the virtual coloring line number. Then, the control unit 22
Controls the ejection operation of each of the inkjet heads P, C, and B based on the ejection pattern data stored in the ejection pattern data storage unit 23.

FIG. 7 is a diagram for explaining the coloring operation of the coloring line. FIG. 7 shows three sets of inkjet heads P,
The operation in the case where one virtual coloring line is painted into three colors using C and B will be described. In FIG. 7, a circle (circle) indicates each inkjet head nozzle, and an arrow indicates that ink is ejected from the nozzle.

When the target virtual coloring line is located at a position facing the ink jet head P by the rotation of the embossing roll 4, the control unit 22 supplies an ejection command signal to each head, and Inject ink. FIG. 7A shows an example in which the nozzles of nozzle numbers M7 to M14, nozzle numbers M21 to M24, and nozzle numbers M27 to M30 eject the first color ink.

The control section 22 supplies an ejection command signal to each of the ink jet heads C in a state where the target virtual coloring line is located at a position facing the ink jet heads C by the rotation of the embossing roll 4. To eject ink from each head. FIG. 7B shows an example in which the second color ink is ejected from the nozzles of the nozzle numbers M1 to M6 and M25 to M26.

When the embossing roll 4 is further rotated so that the target virtual coloring line is located at a position facing the ink jet head B, the control unit 22 sends an ejection command signal to each nozzle of the ink jet head B. The ink is supplied to eject ink from each nozzle. FIG. 7C shows an example in which the third color ink is ejected from each nozzle of the head numbers M15 to M20.

As a result, as shown in FIG. 7D, a target virtual coloring line can be painted using three colors. However, since there is a portion on the surface of the plastic plate S which becomes the concave portion Sa on the virtual coloring line, the first ink supply device 20 does not supply ink to that portion. In addition, a blank portion (a region where ink is not transferred) is intentionally provided in design. In a region where different colors are adjacent, inks of different colors are oozed to each other, and a unique design effect can be exhibited. In order to avoid color bleeding, a blank portion (a region where ink is not transferred) is provided.

Although FIG. 7 shows an example in which different inks are applied to different areas by the respective ink jet heads P, C, and B, colors synthesized by applying different inks to the same area in a superimposed manner are used. It may be obtained. Further, each of the inkjet heads P, C, B
May eject inks of the same color but of different densities. Furthermore, various density gradations may be obtained by overlapping and adhering inks having different densities to a predetermined area.

FIG. 8 is a diagram for explaining the operation of supplying the release agent, the point color ink and the ink mixed with the colored particles to the embossing roll. FIG. 9 shows an example of the surface decoration of a building board manufactured by the surface decoration device according to the present invention. FIG.

First, the release agent is attached to the surface of the embossing roll 4 by the release agent supply device 10 in the form of droplets as shown in FIG. Next, as shown in FIG. 8B, the point ink (water-based) is attached to the recess 4 b of the embossing roll 4 in the form of dots by the inkjet coating method by the first ink supply device 20. The release agent and the point color ink (aqueous) interact with each other, and some of them mutually dissolve, and as shown in FIG. A so-called “bleeding state” is mixed. Next, as shown in FIG. 8D, the ink containing the colored particles is supplied to the convex portion 4 a of the embossing roll 4 by the second ink supply device 30.

Then, with the release agent, the point color ink (aqueous) and the ink mixed with the colored particles adhered to each surface of the embossing roll 4, as shown in FIG. The point color ink (aqueous) and the ink mixed with the colored particles are transferred to the surface of the plastic plate-shaped member S by being pressed against the surface of the plate-shaped member S. Thereby, as shown in FIG. 9, it is possible to apply the surface decoration of the colored concavo-convex pattern only by the processing step using the embossing roll.

In FIG. 9, a recess (groove) is formed in the plastic plate S, and the recess is painted in a lysine tone with joint color, and the protrusion (surface excluding the groove) of the plastic plate S is formed. An example is shown in which a point color is painted so that a natural feeling such as "blurring" or "smearing" appears in a predetermined area. The area where the point color is not painted is the base color (determined by the pigment contained in the molding material of the plastic plate S). The point color is determined in consideration of harmony with the base material color.

As described above, by using the surface decoration device according to the present invention, in one of the processing steps using the embossing roll 4, the surface of the plastic plate S is provided with an uneven pattern and the concave portions (grooves) are formed. Jointing paint and convex part Sb for Sa
And design (design) painting can be performed simultaneously. In addition, the plastic plate-shaped body S on which surface makeup is applied is subjected to clear coating after curing and curing, and becomes a building board as a final product.

Further, since a mixture of a pigment and a molding material for the building board is used, the building board is uniformly colored to the inside with the base material color. Therefore, even when the surface of the building board is damaged or the coating with the point color ink is damaged, the ground color (gray color) of the cement base material is not exposed, and the appearance design is not impaired.

[0054]

As described above, according to the surface decoration device of the present invention, the formation of the uneven pattern and the decorative painting can be simultaneously performed on the surface of the cement substrate.
An architectural board having a concavo-convex pattern and a decorative coating can be economically produced with a small number of processing steps. Further, it is possible to economically produce a building board in which only the concave portions formed on the building board surface are coated with lysine in a small number of processing steps.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the structure of a surface makeup apparatus according to the present invention.

FIG. 2 is a diagram illustrating the structure of an embossing roll.

FIG. 3 is a diagram illustrating a specific example of an ink ejecting unit.

FIG. 4 is a diagram illustrating an example of a colored region on the surface of an embossing roll and an example of a method of designating the colored region.

FIG. 5 is a diagram illustrating the relationship between the ejection repetition cycle of the inkjet head and the interval between virtual coloring lines.

FIG. 6 is a diagram illustrating an example of ejection pattern data.

FIG. 7 is a diagram illustrating a coloring operation of a coloring line.

FIG. 8 is a diagram illustrating an operation of supplying a release agent, point color ink, and ink mixed with colored particles to an embossing roll.

FIG. 9 is a diagram illustrating an example of a surface decoration of a building board manufactured by the surface decoration device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface makeup device 2 Transport base 3 Transport belt 4 Emboss roll 4a Convex part 4b Concave part 5 Rotary pulse encoder 10 Release agent supply device 20 1st ink supply device 21 Ink ejection part 22 Control part 23 Injection pattern data storage part 30 Second ink supply device 31 Transfer roll 32 Applicator roll 40 Cleaning unit S Plastic plate Sa Sa concave (groove) Sb convex (surface)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04C 2/04 E04C 2/30

Claims (9)

(57) [Claims] An architectural board comprising: a top surface of a cement substrate having a projection located at an uppermost position and located substantially on a plane; and a depression located at a position lower than the projection. The bottom portion at the lower position is colored with a pigment for coloring, a granular material for imparting design properties, and a granular mixed ink containing a resin for fixing as a component, and other than the bottom portion in the concave portion. The building board, wherein the portion is in a visible state of the cement substrate. 2. The building board according to claim 1, wherein the ink mixed with particles is engraved in a mesh shape. 3. The building board according to claim 1, wherein the resin has reactivity with a cement alkali component. 4. The building board according to claim 1, wherein the cement substrate has a pigment for coloring as a whole. 5. An embossing roll for embossing the surface of a building board, a first ink supply device for supplying a first ink to a concave portion of the embossing roll, and a second ink supply device for supplying a second ink to a convex portion of the embossing roll. And a second ink supply device for supplying the ink. 6. The surface makeup apparatus according to claim 5, further comprising a release agent supply device for supplying a release agent to the embossing roll. 7. The ink supply device according to claim 5, wherein the first ink supply device has an ink jet head.
The surface makeup device according to claim. 8. The surface makeup apparatus according to claim 5, wherein the second ink supply device has a transfer roll that comes into contact with a convex portion of the embossing roll. 9. The surface cosmetic apparatus according to claim 5, wherein the convex portion of the embossing roll has a groove on a surface thereof suitable for holding the second ink.