KR102400191B1 - Device for testing ultraviolet ray and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an ultraviolet test paper capable of measuring (determining) the amount of light of ultraviolet (UV) light and a method for manufacturing the same. The present invention is a UV sensing sheet 10 that is discolored by UV rays; an ultraviolet irradiation area 20 formed on the ultraviolet sensing sheet 10; and a UV test paper 100 including a color region 30 formed on the UV sensing sheet 10 and a manufacturing method thereof. According to the present invention, after irradiating ultraviolet rays to the ultraviolet irradiation region 20, the amount of ultraviolet rays can be measured (determined) simply and quickly/accurately with the naked eye through direct comparison with the color formed around the ultraviolet irradiation region 20. can

Description

UV test paper and its manufacturing method {DEVICE FOR TESTING ULTRAVIOLET RAY AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an ultraviolet test paper capable of measuring (determining) the amount of ultraviolet (UV) light and a method for manufacturing the same. It relates to a UV test paper capable of measuring (judging) the amount of UV light simply and quickly/accurately with the naked eye through direct comparison with color and a method for manufacturing the same.

Ultraviolet (UV) radiation is used in many industries. Ultraviolet rays are used as a light source for curing (drying) UV-curable resins in, for example, semiconductor manufacturing processes and manufacturing processes of various articles. In addition, the amount of light (irradiation intensity) of ultraviolet rays is measured prior to the actual process. In curing the UV curable resin using a UV irradiator (UV lamp, etc.), it is important in terms of process efficiency and safety to measure the amount of light of the UV irradiator in advance.

Ultraviolet light is difficult to detect with the naked eye (visual), so it is measured using a measuring device such as an ultraviolet light meter. However, a measuring device such as an ultraviolet light meter is expensive and inconvenient to carry, and it is also difficult to measure and has poor accuracy when targeting a three-dimensional article. Instead of such a measuring device, a UV sensing sheet (or UV sensitive paper) is used.

The ultraviolet sensing sheet uses an ultraviolet photosensitive material that changes color (or develops color) only in ultraviolet light. In general, the UV-sensitive sheet has a laminated structure in which an UV-sensitive layer is formed on a base sheet, and the UV-sensitive layer is formed by coating a photosensitive material such as a leuco dye or a phenol-based material. The ultraviolet photosensitive layer has reactivity only with ultraviolet rays and is discolored according to the amount of ultraviolet rays.

The UV detection sheet is cheaper and easier to carry compared to measuring devices such as UV light meter. After discoloration by irradiating the UV sensing sheet with UV light, the amount of UV light is measured (determined) based on the degree of discoloration (color density). At this time, the user measures (judgs) the amount of UV light by visually comparing the color change degree of the UV sensing sheet with the reference color (color table) prepared separately in advance. Based on the degree of discoloration of the UV sensing sheet, it is possible to determine the time to adjust the amount of UV light or replace the UV lamp. For example, Japanese Patent Application Laid-Open No. 2002-22534 and Japanese Patent Application Laid-Open No. 2017-167155 propose a technique related to the above.

However, the conventional method of measuring (determining) the amount of ultraviolet light using the ultraviolet sensing sheet has, for example, the following problems.

As mentioned above, the user is measuring (judging) by comparing the degree of discoloration of the UV sensing sheet with the reference color (color table) prepared separately in advance. However, in this case, after irradiating the UV-sensitive sheet with UV light, it is compared with a separately prepared reference color (color table), so it is not simple and quick.

In addition, in the conventional method, it is difficult to accurately measure (judgment). The UV sensing sheet is sensitive to light (ultraviolet rays) as well as the external environment. As in the prior art, the reference color (color table) prepared separately in advance has a lower reactivity with ultraviolet rays depending on the time of manufacture, and may have a color different from the initial color due to the external environment or storage period, so accurate measurement (judgment) This is difficult to do.

Japanese Patent Application Laid-Open No. 2002-22534 Japanese Patent Application Laid-Open No. 2017-167155

Accordingly, an object of the present invention is to provide an ultraviolet test paper capable of measuring (determining) the amount of ultraviolet light simply and quickly/accurately with the naked eye, and a method for manufacturing the same.

In order to achieve the above object, the present invention

UV detection sheet discolored by UV rays;

an ultraviolet irradiation area formed on the ultraviolet sensing sheet; and

It provides a UV test paper including a color area formed on the UV sensing sheet.

According to one embodiment, the color region includes a plurality of color parts formed around the ultraviolet irradiation region, and the plurality of color parts are formed by irradiating ultraviolet rays on the ultraviolet sensing sheet, It is formed so that each color part has a different color. In this case, the amount of ultraviolet light may be measured (determined) by comparing the color discolored by irradiating the ultraviolet ray to the ultraviolet irradiation region and the color of each color part.

In addition, the UV test paper according to the present invention may include a light quantity display unit formed in each of the color units. In addition, the ultraviolet test paper according to the present invention may include a first light-shielding sheet laminated on the ultraviolet irradiation area, and a second light-shielding sheet laminated on the color area.

In addition, the present invention

A first process of preparing an ultraviolet sensing sheet;

a second process of forming an ultraviolet irradiation region and a color region on the ultraviolet sensing sheet;

The second process is

a masking step of masking an area in which an ultraviolet irradiation area is to be formed, except for an area in which a color area is to be formed on the ultraviolet sensing sheet; and

It provides a method of manufacturing a UV test paper comprising the step of irradiating UV light to form a color area by irradiating UV light on the masked UV sensing sheet.

In addition, the present invention,

A first process of preparing an ultraviolet sensing sheet;

a second process of forming an ultraviolet irradiation region and a color region by laminating a masking sheet including a light-blocking masking part and an exposure part on the ultraviolet sensing sheet;

The second process is

laminating a masking sheet for locating a light-blocking masking part in an area where the ultraviolet irradiation area is to be formed, and locating an exposing part in an area where the color area is to be formed; and

It provides a method for manufacturing a UV test paper comprising the step of irradiating UV light to form a color area by irradiating UV light on the stacked masking sheet.

Advantageous Effects of Invention According to the present invention, it is possible to simply and quickly/accurately measure (determine) the amount of ultraviolet light with the naked eye.

1 is a block diagram of a UV test paper according to a first embodiment of the present invention.
2 is a configuration diagram of a UV test paper according to a second embodiment of the present invention.
3 is a configuration diagram of an ultraviolet test paper according to a third embodiment of the present invention.
4 is a block diagram of an ultraviolet test paper according to a fourth embodiment of the present invention.
5 is a block diagram showing an embodiment of a masking sheet for explaining the manufacturing process of the ultraviolet test paper according to the present invention.
6 is a perspective view illustrating an ultraviolet ray irradiator including a line light source for explaining a method of using the ultraviolet test paper according to the present invention.
7 is a perspective view illustrating an ultraviolet ray irradiator including a surface light source for explaining a method of using the ultraviolet test paper according to the present invention.

The term "and/or" used in the present invention is used in a sense including at least one or more of the components listed before and after. The terms "formed on", "installed on", etc. used in the present invention do not mean only that the components are laminated (installed) in direct contact with each other, but other components between the components contains a more formed (installed) meaning.

According to the first aspect, the present invention provides an ultraviolet test paper capable of measuring (determining) the amount of ultraviolet light simply and quickly/accurately with the naked eye. According to a second aspect, the present invention provides a method for manufacturing the ultraviolet test paper. In addition, according to a third aspect, the present invention provides the use of the ultraviolet test paper and a method of using the same. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[1] UV test paper (100)

1 is a block diagram of an ultraviolet test paper 100 according to a first embodiment of the present invention, and FIG. 2 is a block diagram of an ultraviolet test paper 100 according to a second embodiment of the present invention. And Figure 3 is a block diagram of the ultraviolet test paper 100 according to the third embodiment of the present invention, Figure 4 is a block diagram of the ultraviolet test paper 100 according to the fourth embodiment of the present invention. 1 to 4 show the plane of the ultraviolet test paper 100 according to each embodiment.

First, referring to FIG. 1 , the ultraviolet test paper 100 according to the present invention includes an ultraviolet sensing sheet 10 that is discolored by ultraviolet (UV), an ultraviolet irradiation area 20 formed on the ultraviolet sensing sheet 10, and a color region 30 formed on the ultraviolet sensing sheet 10 . In addition, the ultraviolet test paper 100 according to the present invention may further include a light blocking sheet 40 (refer to FIG. 2 ) laminated on the ultraviolet irradiation region 20 and the color region 30 . Additionally, the ultraviolet test paper 100 according to the present invention may further include an edge region 50 formed around the ultraviolet irradiation region 20 and the color region 30 . An exemplary embodiment for each component will be described as follows.

The ultraviolet sensing sheet 10 is not particularly limited as long as it is discolored (or developed) by irradiation of ultraviolet (UV) light. The ultraviolet sensing sheet 10 may use an ultraviolet sensing sheet (or photosensitive paper) commonly used in the art. The ultraviolet sensing sheet 10 includes, for example, a base sheet and an ultraviolet photosensitive layer formed on the base sheet. The ultraviolet photosensitive layer is formed on at least one surface of the base sheet. In this case, the ultraviolet photosensitive layer is formed on the surface of the base sheet, and is formed on at least the surface corresponding to the ultraviolet irradiation region 20 and the color region 30 . As another example, the ultraviolet photosensitive layer may be formed over the entire surface of the base sheet.

The base sheet may have a function of a support capable of supporting the ultraviolet photosensitive layer. The base sheet is transparent, translucent or opaque, and may be selected from a resin material, a paper material, and/or a fiber material. The base sheet is, for example, polyethylene terephthalate, polybutylene terephthalate, cellulose, cellulose triacetate, polyethylene, polypropylene, polystyrene, polyimide, polyvinyl chloride, polyvinylidene chloride, polyacrylic, polycarbonate and/or a resin film selected from derivatives thereof and the like; Papers, such as high-quality paper and coated paper comprised from pulp; fiber sheets such as woven fabrics and non-woven fabrics; and/or laminated sheets thereof.

The ultraviolet photosensitive layer is formed by coating an ultraviolet photosensitive material on a base sheet, and is not particularly limited as long as it can change color (or develop color) only in ultraviolet (UV) light. The ultraviolet photosensitive material is the same as usual, and may include, for example, a leuco dye and/or a coloring agent such as phenolic. In addition, the ultraviolet photosensitive material may include a color development aid, an ultraviolet absorber, and/or an oxidizing agent, and this is the same as usual.

According to another embodiment of the present invention, the ultraviolet sensing sheet 10 may have a multi-layered structure further including a reflective layer, a surface protection layer, and/or an adhesive layer. The reflective layer may be formed between the base sheet and the UV photosensitive layer, and may include, for example, a binder and white inorganic particles. The surface protective layer may be formed on the UV photosensitive layer, and it is good if it can protect the UV photosensitive layer. In addition, the adhesive layer is for adhesion between the layers, which may be formed between the base sheet and the reflective layer and/or between the reflective layer and the UV photosensitive layer. The surface protective layer and the adhesive layer may be those that do not adversely affect the color development of the ultraviolet photosensitive layer.

The ultraviolet irradiation region 20 is a region irradiated with ultraviolet (UV) light. That is, the ultraviolet ray to be measured is irradiated to the ultraviolet irradiation region 20 . Specifically, the ultraviolet irradiation region 20 is a portion to which ultraviolet rays are irradiated from the ultraviolet irradiator to be measured when the amount of ultraviolet light is measured. The ultraviolet irradiation region 20 may be divided (separated) from the color region 30, for example, through a dividing line L displayed on the ultraviolet sensing sheet 10 .

A line light source 212 (refer to FIG. 6) and/or a planar light source 214 (refer to FIGS. 4 and 7) may be irradiated to the ultraviolet irradiation region 20 when measuring the amount of ultraviolet light. The size and shape of the ultraviolet irradiation area 20 are not limited, and may have various sizes and shapes according to the types of the light sources 212 and 214, for example. For reference, FIGS. 1 and 2 exemplify the ultraviolet irradiation area 20 to which the bar-shaped line light source 212 can be irradiated, which is specifically a rectangular ultraviolet irradiation area having a long length in the vertical direction. (20) is exemplified. In addition, FIGS. 3 and 4 exemplify the ultraviolet irradiation region 20 to which the flat surface light source 214 can be irradiated, which specifically illustrates the ultraviolet irradiation region 20 having a large area of approximately a square. did it

The color region 30 is formed by irradiating ultraviolet rays, and includes a plurality of color units 32 . At this time, the plurality of color units 32 are formed (discolored) according to the amount of ultraviolet light, and thus have a difference in color according to each color unit 32 . Specifically, the plurality of color units 32 are formed by irradiating ultraviolet rays on the ultraviolet sensing sheet 10 , and are formed (discolored) by the difference in the amount of light of the irradiated ultraviolet rays, so that each color unit 32 has a different color. has

In the present invention, "difference in color" and "different color" mean that the type of color and/or the concentration of color appear differently for each of the plurality of color units 32, which is determined by the naked eye (visual) ( identification) is possible. In addition, the plurality of color units 32 have different colors because the degree of discoloration (eg, color density) is different depending on the difference in the amount of UV light irradiated for each color unit 32 . In this case, each of the color units 32 may have a color difference due to a difference in the amount of accumulated light irradiated.

In the present invention, the color region 30 serves as a reference color table (or color concentration table) when measuring (determining) the amount of ultraviolet light. Specifically, the plurality of color units 32 include a reference color table that can be compared (contrast) with the color discolored by the ultraviolet irradiation of the ultraviolet irradiation region 20 when measuring (determining) the amount of ultraviolet light (or color intensity table). That is, in the present invention, the amount of ultraviolet light is measured (determined) based on the degree of discoloration of the ultraviolet irradiation region 20 and the color portion 32 of the color region 30 . A detailed description thereof will be given later.

The color region 30 may be formed around the ultraviolet irradiation region 20 , for example. Specifically, as illustrated in FIGS. 1 to 4 , the ultraviolet irradiation region 20 is positioned at approximately the center of the ultraviolet sensing sheet 10 , and the ultraviolet irradiation region 20 is irradiated around the ultraviolet irradiation region 20 by A plurality of preformed (discolored) color portions 32 may be formed.

In the present invention, the number of color units 32 is plural, and the number thereof is not limited, and may have an appropriate number according to the type of ultraviolet irradiator, the field of application of ultraviolet rays, and/or the purpose of measuring the amount of ultraviolet light. When the number of the color parts 32 is n, n may be, for example, 4 or more, 6 or more, 8 or more, or 10 or more, and the upper limit thereof is not limited, but for example, 6 or less. , 8 or less, 10 or less, 15 or less, 20 or less, or 30 or less. 1 and 2 illustrate a color area 30 having eight color units 32 , and FIGS. 3 and 4 illustrate a color area 30 having ten color units 32 .

In addition, the ultraviolet test paper 100 according to the present invention may further include a light amount display unit 35 for displaying (meaning) the amount of ultraviolet light. The light amount display unit 35, as long as a user (a measurer of the amount of ultraviolet light) can recognize the light amount of ultraviolet light, this may be expressed, for example, by numbers, letters, symbols, or a combination thereof. The light amount display unit 35 may be formed on each of the color units 32 through printing or the like, or may be formed in the edge region 50 located on the side of each color unit 32 .

According to an exemplary embodiment, the light amount display unit 35 may be formed on each color unit 32 , and may be displayed as a value of the amount of ultraviolet light irradiated when each color unit 32 is formed. That is, the light amount display unit 35 may be displayed as a number directly indicating the value of the actually irradiated ultraviolet light. This is as illustrated in the drawings. For example, the number “100” displayed on the color unit 32 in FIG. 1 means a light amount value of 100 mJ/cm 2 , the number “200” means a light amount value of 200 mJ/cm 2 , and the number “300” " may mean a light intensity value of 300 mJ/cm 2 . In this case, the displayed number may mean the value of the actual amount of ultraviolet light irradiated when each color part 32 is formed. The term "light amount (value)" used in the present invention includes not only the meaning of the light amount (value) by one UV irradiation, but also the meaning of the accumulated light amount (value) accumulated by two or more UV irradiation times. can do.

As described above, including the light quantity display unit 35 formed in each color unit 32 , when the light quantity display unit 35 directly displays the UV light quantity value as a number, an immediate determination of the UV light quantity can be made. For another example, the light amount display unit 35 may display the UV light amount value as a number, but may be displayed in a range of sections such as “1 to 100”, “101 to 200”, and “201 to 300”. . In this case, the "1 ~ 100" means a light quantity value between 1 ~ 100 mJ/cm2, the "101 ~ 200" means a light quantity value between 101 ~ 200 mJ/cm2, and the "201 ~ 300" may mean a light quantity value between 201 and 300 mJ/cm 2 .

In addition, the plurality of color units 32 may be sequentially arranged according to the value of the amount of irradiated ultraviolet light, that is, according to the degree of discoloration (eg, color concentration). Specifically, as illustrated in FIG. 1 , the numbers “100”, “200” ... “800” displayed on each color unit 32 are the light quantity values ( mJ/cm 2 ), and their color density is "100" < "200" < .... < "800", and the larger the number of the light quantity display unit 35, the darker the color density. And as shown in FIG. 1 , the four color units 32 are arranged on the left side and the four color units 32 are arranged on the right side, and may be arranged in the order of color intensity.

The ultraviolet test paper 100 according to the present invention described above can measure (determine) the amount of ultraviolet light simply and quickly. First, a user (a measurer of the amount of ultraviolet light) irradiates the ultraviolet ray on the ultraviolet irradiation area 20 using an ultraviolet irradiator to be measured to change color. The degree of discoloration (eg, color density) of the ultraviolet irradiation area 20 and each color part 32 of the color area 30 are compared with the naked eye. And by selecting the color portion 32 that is the same as or most similar to the degree of discoloration (eg, color density) of the ultraviolet irradiation region 20 from among the plurality of color portions 32 , the amount of ultraviolet light of the ultraviolet irradiator can be easily and quickly reduced. You can measure (judgment).

Additionally, when each color unit 32 includes a light quantity display unit 35 such as “100”, “200” and “300”, an immediate determination is made at the same time as the color unit 32 is selected, It can also numerically measure (judgment) the amount of ultraviolet light. At this time, when the amount of light by measurement (judgment) is not the desired light amount, the light amount of the ultraviolet irradiator may be adjusted or the UV lamp may be replaced.

In addition, according to the present invention described above, it has at least the following operational effects and advantages compared to the conventional method for measuring using a UV sensing sheet (or photosensitive paper).

First, it is simpler and faster than the prior art. As mentioned above, in the conventional case, after discoloring the UV sensing sheet, the degree of discoloration is measured (determined) by comparing it with a separately prepared reference color (color table). However, in this case, after irradiating UV light to the UV sensing sheet, it is not simple and quick because it is compared with a separate reference color (color table).

In contrast, the present invention is simpler and faster than the prior art because ultraviolet rays are irradiated to the ultraviolet irradiation region 20 and then directly compared with the color region 30 formed around the ultraviolet irradiation region 20 . That is, the present invention proceeds through direct comparison with each color part 32 of the color region 30 formed on the ultraviolet test paper 100 itself, without using a separate reference color (color table), so it is simpler than the prior art. and quick

In addition, according to the present invention, above all, more accurate measurement (judgment) can be made compared to the prior art. As in the prior art, when the UV sensing sheet for measurement and the reference color (color table) for comparison are each composed of separate members, it is difficult to accurately measure (judgment). The ultraviolet sensing sheet, that is, the photosensitive material, is sensitive to light (ultraviolet rays) as well as the external environment and storage time. As in the prior art, a reference color (color table) prepared separately in advance may have a lower reactivity with UV rays depending on the time of manufacture, and may have a color (discoloration) different from the initial color due to an external environment or storage period.

In addition, in the case of the prior art, since the two members to be compared, that is, the UV sensing sheet and the reference color (color table) are each separately configured, it is difficult for the sensitive photosensitive material to show the same reactivity (degree of discoloration) to UV rays. . For example, when the reactivity (photosensitivity) of the UV detection sheet and the reactivity (photosensitivity) of the reference color (color table) are different, it is difficult to show the same reactivity (degree of discoloration). This is even more so when the photosensitive materials applied to the two members are different from each other. In particular, since the photosensitive material of the UV sensing sheet may be different for each product, it is not reliable to compare the UV sensing sheet of all products with a pre-prepared reference color (color table). At least for the above reasons, it is difficult to accurately measure (determination) in the conventional case.

In contrast, in the present invention, both the ultraviolet irradiation region 20 and the color region 30 are formed on the ultraviolet sensing sheet 10, and the ultraviolet irradiation region 20 and the color region 30 to be compared are 1 It is formed on the same UV sensing sheet 10, so that accurate measurement (judgment) can be made. In addition, even if there are any negative conditions such as external environment or storage period, in the present invention, accurate measurement (judgment) can be made because the UV irradiation region 20 and the color region 30, which are the comparison targets, have the same reactivity. there is. That is, since the ultraviolet irradiation region 20 and the color region 30 share the same photosensitive material on the ultraviolet sensing sheet 10 , both have the same reactivity (photosensitivity).

Therefore, the present invention is implemented with one UV test paper 100, but both of the UV irradiation area 20 and the color area 30 to be compared are formed on the UV sensing sheet 10, It is simpler and faster than the conventional measurement using two members, and it has the same reactivity (photosensitivity) under any conditions so that accurate measurement (judgment) is made, and the color area 30 is actually It has technical significance in that it is formed through direct irradiation of ultraviolet rays suitable for the process and has reliability and accuracy.

Meanwhile, referring to FIG. 2 , the ultraviolet test paper 100 according to the present invention may further include a light blocking sheet 40 laminated on the ultraviolet irradiation region 20 and the color region 30 . The light blocking sheet 40 includes a first light blocking sheet 41 laminated (attached) on the ultraviolet irradiation region 20 and laminated (attached) on the color region 30 according to an embodiment. A second light blocking sheet 42 may be included.

At this time, when the ultraviolet irradiation area 20 is irradiated with ultraviolet light, the first light blocking sheet 41 is separated and removed, and the second light blocking sheet 42 is laminated (attached) to the color area 30 . In the UV irradiation region 20 may be irradiated with ultraviolet rays. Accordingly, the color region 30 may be protected from ultraviolet rays in the process of irradiating ultraviolet rays to the ultraviolet irradiation region 20 .

The ultraviolet test paper 100 according to the present invention may be supplied to a user (consumer), etc. after the light-shielding sheets 40, 41, 42 are laminated (attached), and then commercialized through packaging.

In addition, the UV test paper 100 according to the present invention may include an edge region 50 formed around the UV irradiation region 20 and the color region 30 on the UV sensing sheet 10 . In this case, the edge region 50 may be formed on the upper side, the lower side, the left side, and/or the right side of the UV sensing sheet 10 . The edge region 50 may provide, for example, an attachment surface for attaching the light blocking sheets 40 , 41 , and 42 . Specifically, one surface of the light blocking sheets 40 , 41 , 42 may be attached to the edge region 50 . At this time, the attachment surfaces (the rear side in FIG. 2) of the light blocking sheets 40, 41, and 42 may be coated with an adhesive.

The light blocking sheets 40, 41, and 42 are not particularly limited as long as they have light blocking properties. The light blocking sheets 40, 41, and 42 have at least UV blocking properties, and may be flexible. The light blocking sheets 40, 41, and 42 may include a light blocking material. The light blocking sheets 40, 41, and 42 may be formed of, for example, a sheet including a light blocking material. For another example, the light blocking sheets 40 , 41 , and 42 may include a sheet body and a light blocking layer formed by coating a light blocking material on one or both surfaces of the sheet body.

The sheet body is not particularly limited as long as it can serve as a support, and it may be composed of, for example, a sheet (or film) such as a resin material and/or a fiber material. Specific examples of the sheet body include polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, polystyrene, polyimide, polyvinyl chloride, polyvinylidene chloride, polyacrylic, polycarbonate and/or derivatives thereof. It may be composed of a resin film selected from

In addition, the light blocking material may include a binder and a light blocking agent. The binder may be selected from polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, polystyrene, polyimide, polyvinyl chloride, polyvinylidene chloride, polyacrylic, polycarbonate and/or derivatives thereof. The light blocking agent is good as long as it can block light such as ultraviolet rays, and this may include at least a UV blocking agent. The sunscreen may be selected from, for example, a hindered amine-based, salicylic acid-based, benzophenone-based, benzotriazole-based and/or cyanoacrylate-based group.

According to one embodiment, the light-blocking material may include a binder and a light-blocking agent (such as a UV-blocking agent), and in addition to this, a dispersing agent. In this case, as long as the dispersing agent can improve the dispersibility of the light blocking agent (such as a UV blocking agent), for example, Cetrimonium methosulfate may be usefully used. The cetrimonium methosulfate is advantageous in dispersibility of a light-blocking agent (such as a UV-blocking agent), which can also improve UV-blocking properties. In addition, the light blocking material may further include an inorganic material and/or an additive.

In addition, the light blocking material may include 10 to 30 parts by weight of a light blocking agent (such as a UV blocking agent) and 0.5 to 3 parts by weight of cetrimonium methosulfate as a dispersant based on 100 parts by weight of the binder. At this time, when the amount of the light-blocking agent (sunscreen agent, etc.) is less than 10 parts by weight, the light-blocking property according to its use is insignificant, and when it exceeds 30 parts by weight, the synergistic effect due to excessive use is not so great. In addition, when the content of the cetrimonium methosulfate is less than 0.5 parts by weight, the dispersibility according to the addition thereof may be insignificant. And when the content of cetrimonium methosulfate exceeds 3 parts by weight, the synergistic effect due to excessive use is not so great, and in some cases, stains may occur on the coating surface.

Referring to FIG. 4 , the ultraviolet test paper 100 according to the present invention may further include a target portion 25 formed on the ultraviolet irradiation region 20 . Through the target unit 25 , it is possible to determine whether or not there is an abnormality (such as a malfunction or failure) of at least the ultraviolet light sources 212 and 214 when the ultraviolet rays are irradiated. The target part 25 may be displayed on the ultraviolet irradiation area 20 by a dotted line or a solid line through printing, for example. In addition, the target unit 25 may include a plurality of target cells (25a). As shown in FIG. 4 , the plurality of target cells 25a are divided by a display line (trajectory line) indicated by a circle, a rectangle, and/or a straight line, and a plurality of target cells are provided. After the ultraviolet irradiation on the ultraviolet irradiation region 20, the state of the light sources 212 and 214 through the target unit 25, such as malfunction, failure, and/or replacement time may be determined. The said target part 25 is useful in the following case, for example.

In FIG. 4 , a planar light source 214 in a flat shape is shown together as light sources 212 and 214 . The surface light source 214 may be configured by arranging a plurality of UV chips 214a in horizontal and vertical directions. That is, the surface light source 214 may include a flat plate 214b and a plurality of UV chips 214a arranged and installed on the plate 214b. At this time, the plurality of UV chips 214a may be arranged in a circular shape or a rectangular shape, and the arrangement in a rectangular shape is illustrated in FIG. 4 .

When ultraviolet rays are irradiated to the ultraviolet irradiation region 20 using the surface light source 214 as described above, the ultraviolet irradiation region 20 is discolored over a large area. For example, when the plurality of UV chips 214a are arranged in a rectangular shape, the UV irradiation area 20 may be discolored in a substantially rectangular planar shape. At this time, when the amount of light of the surface light source 214 is not constant (uniform) with respect to the entire area of the ultraviolet irradiation region 20, that is, the UV chip 214a in which a malfunction or failure occurs among the plurality of UV chips 214a is If present, any portion of the discolored UV irradiation area 20 may have a different degree of discoloration. In this case, it is possible to determine (extract) the UV chip 214a having a malfunction or failure through the target unit 25 . That is, the target cells 25a having different discoloration degrees are visually extracted from among the plurality of target cells 25a formed in the target part 25, and the position trajectory of the target cell 25a and the surface light source 214 are By matching the positions, it is possible to determine (extract) the UV chip 214a in which a malfunction or failure has occurred. As described above, it is possible to determine (extract) whether the UV chip 214a has an abnormality (malfunction or failure, etc.) through the target unit 25, so that repair or replacement can be performed.

[2] Preparation of UV test paper 100

The ultraviolet test paper 100 of the present invention may be manufactured in various ways. The ultraviolet test paper 100 of the present invention, for example, may be manufactured by the manufacturing method according to the present invention described below, but is not limited thereto.

The manufacturing method of the ultraviolet test paper 100 according to the present invention includes a first process of preparing the ultraviolet detection sheet 10 , and an ultraviolet irradiation region 20 and a color region 30 on the ultraviolet detection sheet 10 . A second step of forming is included.

The first process is not particularly limited, as long as the UV sensing sheet 10 that is discolored by UV light is prepared. The UV sensing sheet 10 is as described above, and it can be used by preparing (purchasing) a conventional UV sensing sheet (or photosensitive paper).

The second process, according to one embodiment, excludes the region where the color region 30 is to be formed on the ultraviolet sensing sheet 10, and at least a region in which the ultraviolet irradiation region 20 is to be formed. a masking step; An ultraviolet irradiation step of forming a color region 30 by irradiating ultraviolet rays on the masked ultraviolet sensing sheet 10 may be included. In this case, in the masking step, at least the ultraviolet irradiation region 20 may be masked, excluding the color region 30 . In the masking step, specifically, the entire area except for the color area 30 , that is, the ultraviolet irradiation area 20 and the edge area may be masked. In the present invention, the masking is not particularly limited as long as it can block ultraviolet rays.

In the second step, the masking sheet 60 may be used according to another embodiment. That is, the second process may be performed by laminating the masking sheet 60 on the ultraviolet sensing sheet 10 . 5 shows an embodiment of the masking sheet 60 . When such a masking sheet 60 is used, the process is monotonous, and it can also easily form the color region 30 including the plurality of color portions 32 .

Referring to FIG. 5 , the masking sheet 60 is light-transmitting (light-blocking), and has at least UV blocking properties. The masking sheet 60 has, for example, the shape of a sheet (or film), which may also have a size (width x length) capable of covering the entire surface of the UV sensing sheet 10 . The masking sheet 60 may be rigid or flexible, and as long as it has UV blocking properties, it may be transparent, translucent or opaque.

The masking sheet 60 may include a light-blocking sheet capable of blocking at least ultraviolet rays according to the first embodiment. The light-blocking sheet may be selected from a resin material and/or a fiber material. The light-blocking sheet may include, for example, a resin sheet including a resin and a light-blocking agent. The masking sheet 60 may include a substrate and a light blocking layer formed on one or both surfaces of the substrate according to the second embodiment. The substrate may be formed of a sheet (or film) such as a resin material and/or fiber material, and the light blocking layer may be formed by coating a light blocking composition including a resin and a light blocking agent on the substrate.

The resin (and resin material) is, for example, polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, polystyrene, polyimide, polyvinyl chloride, polyvinylidene chloride, polyacrylic, polycarbonate and/or these may be selected from derivatives of In addition, the light-blocking agent is good as long as it can block light such as ultraviolet rays, which may include at least a UV-blocking agent.

The masking sheet 60 may include a light blocking material constituting the light blocking sheets 40, 41, and 42 as described above according to the third embodiment. Components and contents constituting the light-shielding material are the same as those of the light-shielding sheets 40, 41, and 42, and thus a detailed description thereof will be omitted.

In addition, the masking sheet 60 includes at least a light-blocking masking part 61 for masking the ultraviolet irradiation region 20 , and an exposure part 62 for forming the color region 30 . In this case, the light-blocking masking unit 61 is according to the first to third embodiments. The exposure part 62 is a through hole through which ultraviolet rays are irradiated (passed through), and may be formed by, for example, drilling or cutting.

In the second process, the masking sheet 60 as described above is used, but the light-blocking masking part 61 is positioned in the area where the ultraviolet irradiation area 20 is to be formed, and the color area 30 is formed in the area. laminating the masking sheet 60 to position the exposed portion 62; It may include an ultraviolet irradiation step of irradiating ultraviolet rays on the stacked masking sheet 60 to form a color region 30 .

In addition, the second process may be performed using a plurality of masking sheets 60 to form a plurality of color portions 32 having color differences. That is, in the second process, when n color portions 32 having different colors are formed for each color portion 30, n masking sheets having different sizes of exposure portions 62 for each masking sheet 60 ( 60) can be used to proceed. At this time, in the second process, the lamination step of the masking sheet 60 and the UV irradiation step are performed as one cycle (1 cycle), and the cycle is performed a plurality of times (n times). In addition, as the number of cycles (number of cycles) increases, the masking sheet 60 in which the size of the exposure part 62 is gradually reduced is used and the amount of ultraviolet light is accumulated, so that the plurality of color parts 32 having different colors to form Hereinafter, the process of manufacturing the ultraviolet test paper 100 shown in FIG. 1 will be described as an example.

When the number of color parts 32 of the color region 30 is n, n masking sheets 60 may be used. As shown in FIG. 1 , when the number n of the color parts 32 is 8 (n = 8), the same number of the masking sheets 60 may be used. At this time, as shown in FIG. 5 , the masking sheet 60 is a first masking sheet 60-1, a second masking sheet 60-2 .... n-th masking sheet 60-n (n) = 8). In addition, each of the masking sheets 60 (60-1 to 60-n) includes an exposure part 62, and the exposure part 62 for each masking sheet 60 (60-1 to 60-n). The sizes are different, and as n increases, the size of the exposed portion 62 becomes smaller. That is, the size of the exposed portion 62 formed in the n-1 th masking sheet 60 - n - 1 is smaller than that of the n th masking sheet 60 - n. Specifically, the size of the exposed portion 62 formed on the second masking sheet 60-2 is smaller than that of the first masking sheet 60-1, and the third masking sheet 60-2 is smaller than that of the second masking sheet 60-2. The size of the exposed portion 62 formed on the sheet is smaller, and is the same as below.

By using the above plurality (n) of the masking sheets 60 (60-1 to 60-n), the process of laminating the masking sheet 60 and the ultraviolet irradiation step as one cycle is performed n times, and the cycle As the number of times increases, the masking sheet 60 (60-1 to 60-n) having a small size of the exposure part 62 is used. That is, the exposure portion 62 of the n-th masking sheet 60-n used in the n-th cycle is larger in size than the exposure portion 62 of the n-th masking sheet used in the previous step (n-1 th). It is small, and the difference in the size of the exposure unit 62 for each cycle is equal to the size of one color unit 32 .

In FIG. 5 , the color part 32 is indicated by a dotted line. Referring to FIG. 5 , the size of the exposed portion 62 formed on the second masking sheet 60-2 is 1 greater than the size of the exposed portion 62 formed on the first masking sheet 60-1 used in the previous step. It is as small as the size corresponding to the color part 32 of the dog. As such, as the number of cycles increases, the size of the exposed portion 62 formed on each of the masking sheets 60 (60-1 to 60-n) is larger than that of the exposed portion 62 in the previous stage. as small as the corresponding size. Accordingly, ultraviolet rays are irradiated in such a way that one color part 32 is masked for each cycle.

In addition, in forming each color part 32 by irradiating ultraviolet rays, the same amount of ultraviolet rays may be irradiated for each cycle. That is, the amount of ultraviolet light irradiated in the n-th cycle may be irradiated with the same amount of ultraviolet light as the amount of ultraviolet light irradiated in the preceding (n-1 th) cycle. At this time, the amount of ultraviolet light is the same amount of light for each cycle, for example, by irradiating with a light amount of 50 to 150 mJ/cm 2 , and each cycle may be performed, for example, it may be irradiated with a light amount of 100 mJ/cm 2 .

As a specific example, first, a first masking sheet 60-1 is laminated on the UV sensing sheet 10, and then UV rays are irradiated with a light quantity of 100 mJ/cm2. (1st cycle) This first cycle , the same amount of ultraviolet light is irradiated to the eight color units 32 of FIG. 1 , and the eight color units 32 are all discolored to the same color.

Next, the first masking sheet 60-1 is removed, and a second masking sheet 60-2 is laminated on the ultraviolet sensing sheet 10, and then 100 mJ/cm 2 of the same amount of light as in the first cycle. (Second cycle) When this second cycle is carried out, ultraviolet rays are irradiated to the remaining seven color parts 32 except for the first color part 32 indicated by 100 in FIG. 1 . turned into a different color. Specifically, the seven color units 32 except for the first color unit 32 have the same color due to the same amount of light (accumulated light amount: 200 mJ/cm 2 ). After the second cycle, the first color part 32 was irradiated with a light amount of 100 mJ/cm 2 , and the remaining seven color parts 32 were irradiated with a light amount of 200 mJ/cm 2 as an accumulated light amount. do.

In addition, after removing the second masking sheet 60-2, and stacking a third masking sheet on the ultraviolet sensing sheet 10, ultraviolet rays are irradiated with a light quantity of 100 mJ/cm 2 , which is the same amount of light as in the first cycle (Third cycle) When this third cycle is performed, ultraviolet rays are irradiated to the remaining six color parts 32 except for the first and second color parts 32 indicated by 100 and 200 in FIG. 1 . discolored to a different color. In this case, the six color units 32 have the same color by the same amount of light (accumulated light amount: 300 mJ/cm 2 ). That is, after the third cycle, 100 mJ/cm 2 of light is irradiated to the first color part 32 and 200 mJ/cm 2 of light is irradiated to the second color part 32 to provide a different color (eg, difference in color intensity). And the remaining six color parts 32 are all irradiated with an accumulated light amount of 300 mJ/cm 2 , and the six color parts 32 have the same color, but different colors from the first and second color parts 32 . have

When the fourth cycle to the nth cycle (n = 8) is performed in the above manner, eight color units 32 having different colors are formed in the color region 30 as shown in FIG. 1 . That is, finally, in the n-th cycle, the n-th masking sheet 60-n-1 is removed, and the n-th masking sheet 60-n is laminated on the ultraviolet sensing sheet 10, UV rays are irradiated with a light amount of 100 mJ/cm 2 , which is the same amount of light as in the first cycle. (n-th cycle) When the n-th cycle is performed, due to the difference in the accumulated light amount irradiated to each color unit 32 , A plurality of color units 32 having different colors are formed. For example, when n = 8, as shown in FIG. 1 , eight color units 32 having different colors are formed by the accumulated light amounts of 100, 200, 300 ....800. For another example, when n = 10, as shown in FIG. 3 , ten color units 32 having different colors are formed by the accumulated light amounts of 100, 200, 300 .... 900, and 1000 .

As described above, a plurality of masking sheets 60 (60-1 to 60-n) having different sizes of the exposure part 62 for each cycle are used as described above, but as the number of cycles (the number of n) increases, the exposure part ( If the masking sheet 60 (60-1 ~ 60-n) having a smaller size is used and irradiated with the same amount of light for each cycle, the amount of UV light is accumulated as the number of cycles increases, so that different colors are produced. The branch may form a plurality of color portions 32 . In addition, in irradiating ultraviolet rays, when the same amount of light (eg, 100 mJ/cm 2 ) is irradiated for each cycle as above, the sensitive photosensitive material reacts more reliably than otherwise, so that the more accurate color part 32 is can be formed.

[3] Purpose and method of use

The use of the ultraviolet test paper 100 according to the present invention is not particularly limited as long as it is used for measuring (determining) the amount of light of ultraviolet rays. The ultraviolet test paper 100 according to the present invention can be used for measuring (determining) the amount of ultraviolet light in various industrial fields using ultraviolet rays. The ultraviolet test paper 100 according to the present invention may include, for example, the degree of curing (drying) of the ultraviolet curable resin in the semiconductor manufacturing process or the manufacturing process of various articles; degree of separation (reduction of adhesive force) of the adhesive tape in the semiconductor manufacturing process, etc.; degree of sterilization or deodorization in purification facilities such as water treatment; And it can be used for judging the degree of sunburn caused by ultraviolet rays of a person or thing.

Meanwhile, FIGS. 6 and 7 are diagrams for explaining a method of using the ultraviolet test paper 100 according to the present invention.

6 and 7 , the UV test paper 100 may be loaded into the UV irradiator 200 . The ultraviolet irradiator 200 may include a housing 201 and light sources 212 and 214 installed in the housing 201 . And one side of the housing 201 is provided with an inlet 202 in which the ultraviolet test paper 100 is charged.

The light sources 212 and 214 are the same as described above. The light sources 212 and 214 irradiate ultraviolet rays, which may be selected from a line light source 212 having a substantially bar shape, a planar light source 214 having a flat plate shape, and the like. At this time, in the case of the line light source 212, the ultraviolet test paper 100 as shown in Figs. 1 and 2 is charged, and in the case of the surface light source 214, the ultraviolet test paper 100 as shown in Figs. is loaded

According to one embodiment, the ultraviolet test paper 100 may be stacked on the laminate 300 and loaded into the ultraviolet irradiator 200 . The ultraviolet test paper 100 may be attached to one surface of the laminate 300 . The laminated body 300 may have a plate-like shape or a three-dimensional shape. The laminated body 300 may have functions such as a transport means, a fixing means, and/or a spacing means of the ultraviolet test paper 100 .

Referring to FIG. 6 , the laminate 300 may have a plate-like shape. This to-be-stacked body 300 may act as a transport means and/or a fixing means of the ultraviolet test paper 100 . That is, when the ultraviolet test paper 100 is laminated (attached) on the plate-shaped laminated body 300 and charged into the ultraviolet irradiator 200, the transfer (charge) of the ultraviolet test paper 100 is easy, It can be easily fixed (mounted) to the lower side of the line light source 212 .

Also, referring to FIG. 7 , the stacked body 300 may have a three-dimensional shape with a predetermined thickness (height). Such a laminated body 300 may act as a transport means, a fixing means, and/or a spacing means of the ultraviolet test paper 100 . That is, when the ultraviolet test paper 100 is laminated (attached) on the laminated body 300 of a predetermined thickness (height) and charged into the ultraviolet irradiator 200, it is easy to transport (charge) and fix (mount). Do. At the same time, the ultraviolet test paper 100 is spaced apart from the bottom of the ultraviolet irradiator 200 by the thickness (height) of the laminate 300 and the distance between the ultraviolet test paper 100 and the surface light source 214 is can be adjusted.

In the present invention, the laminate 300 is not limited to a plate shape and a three-dimensional shape. The to-be-stacked body 300 transfers (charges) the ultraviolet test paper 100 into the ultraviolet irradiator 200; Fixing (mounting) the UV test paper 100 to the inside of the UV irradiator 200; spaced apart the UV test paper 100 from the bottom of the UV irradiator 200; And/or the UV test paper 100 and the light source 212, 214 is good as long as it can achieve an appropriate distance adjustment. Also, in some cases, the laminate 300 may be an article or a sample thereof used in an actual process.

Examples of the present invention are exemplified below. The following examples show exemplary embodiments of the light-shielding sheet.

[Example 1]

First, a polyethylene terephthalate film (PET film) having a thickness of about 200 μm was prepared. And by coating/drying a light-shielding material on one surface of the PET film, a light-shielding sheet specimen was prepared. The light-shielding material uses a solution containing a binder, a sunscreen, a dispersant, and an inorganic material. As the binder, an aqueous dispersion acrylic emulsion was used. In this case, in the case of the sunscreen, benzotriazole was used, but 8.5 parts by weight was used with respect to 100 parts by weight of the binder as an amount lower than the appropriate amount. In addition, as the dispersant, Cetrimonium methosulfate was used, but 2.5 parts by weight was used based on 100 parts by weight of the binder, and 1.5 parts by weight was used as the inorganic material as zinc oxide based on 100 parts by weight of the binder.

[Examples 2 to 6]

A light-shielding sheet specimen was prepared in the same manner as in Example 1, except that the content of the dispersant or the type (component) of the dispersant was changed according to each Example (2 to 6).

The content and type (component) of the dispersant used in each of the above Examples are shown in Table 1 below. In addition, the UV blocking rate (%) and the surface condition of the light blocking sheet according to each example were observed. The UV blocking rate (%) was measured at a wavelength of 400 nm according to a conventional measurement method using an UV measuring device (UV-Vis Spectrometer). At this time, the UV blocking rate (%) was measured for four points (4-point) (P1, P2, P3, P4) of the light-shielding sheet specimen. The above results are shown in [Table 1] below.

<Characteristics evaluation result of light-shielding sheet according to each example> note Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 dispersant
(parts by weight) CM-MS ⁽¹⁾ 2.5 1.0 4.5 - - - SB-MO ⁽²⁾ - - - 2.5 - - PO-SB ⁽³⁾ - - - - 2.5 - PD ⁽⁴⁾ - - - - - 2.5 UV
Blocking rate (%) P1 100 100 100 98 96 96 P2 100 100 100 100 100 96 P3 100 98 100 94 98 74 P4 100 100 100 100 88 82 Surface condition (stain) doesn't exist doesn't exist spotting doesn't exist doesn't exist doesn't exist
(1) CM-MS: Cetrimonium methosulfate
(2) SB-MO: sorbitan monooleate
(3) PO-SB: Polyoxyethylene sorbitan
(4) PD: Phosphorus-based dispersant (BYK-154 product)

As shown in [Table 1], when cetrimonium methosulfate was used as a dispersing agent (Examples 1 to 3), surfactants such as sorbitan monooleate and polyoxyethylene sorbitan (Examples 4 to 5) ) or a phosphorus-based compound (Example 6) has higher dispersibility than it was found to show excellent UV blocking rate (%) at 4 points. In addition, as in Example 3, when the content of cetrimonium methosulfate was high, it was found that stains occurred on the coating surface.

10: UV detection sheet 20: UV irradiation area
25: target part 30: color gamut
32: color part 35: light quantity display part
100: UV test paper 200: UV irradiator
212, 214: light source 300: laminated body

Claims (13)

UV-sensitive sheet 10 that is discolored by UV light;
an ultraviolet irradiation area 20 formed on the ultraviolet sensing sheet 10;
a color region 30 formed on the ultraviolet sensing sheet 10;
a first light blocking sheet 41 laminated on the ultraviolet irradiation area 20; and
and a second light blocking sheet 42 laminated on the color area 30,
The ultraviolet irradiation region 20 and the color region 30 have the same reactivity,
The color region 30 includes a plurality of color portions 32 formed around the ultraviolet irradiation region 20,
The plurality of color parts 32 are formed by irradiating ultraviolet rays to the ultraviolet sensing sheet 10, and are formed by the difference in the amount of light of the irradiated ultraviolet rays, so that each color part 32 has a different color,
When the ultraviolet irradiation region 20 is irradiated with ultraviolet rays, the first light blocking sheet 41 is separated and removed from the ultraviolet irradiation region 20, and the second light blocking sheet 42 is UV is irradiated to the ultraviolet irradiation region 20 in a state of being stacked on the color region 30,
UV test paper 100 for determining the amount of UV light by comparing the color discolored by irradiating UV to the UV irradiation area 20 and the color of each color part 32 .
According to claim 1,
The ultraviolet test paper 100 further includes a light quantity display unit 35 formed in each color unit 32,
The light quantity display unit 35 is an ultraviolet test paper 100 that is displayed with the value of the ultraviolet light quantity irradiated when the respective color units 32 are formed.
The method of claim 1,
The first light blocking sheet 41 and the second light blocking sheet 42 are
sheet body;
Including a light-shielding material coated on one side or both sides of the sheet body,
The light-shielding material is a UV test paper 100 comprising 10 to 30 parts by weight of a light blocking agent and 0.5 to 3 parts by weight of cetrimonium methosulfate with respect to 100 parts by weight of the binder.
According to claim 1,
The ultraviolet test paper 100 is formed on the ultraviolet irradiation area 20, and the ultraviolet test paper 100 further comprising a target part 25 that can determine whether there is an abnormality of the ultraviolet light sources 212 and 214. .
5. The method of claim 4,
The ultraviolet light sources 212 and 214 include a plate-shaped plate 214b and a plurality of UV chips 214a arranged and installed on the plate 214b,
The target unit 25 includes a plurality of target cells (25a),
After irradiating the ultraviolet ray to the ultraviolet ray area 20, the target cell 25a having a different degree of discoloration and the plurality of UV chips 214a are matched to each other to determine whether the UV chip 214a is abnormal. 100).
A first step of preparing an ultraviolet sensing sheet 10 including a base sheet and an ultraviolet photosensitive layer formed on the base sheet;
A first agent for forming an ultraviolet irradiation region 20 and a color region 30 by laminating a masking sheet 60 including a light-blocking masking part 61 and an exposure part 62 on the ultraviolet sensing sheet 10 . Including the 2nd process,
The second process is
Lamination step of the masking sheet 60 in which the light-blocking masking part 61 is positioned in the region where the ultraviolet irradiation region 20 is to be formed, and the exposure part 62 is positioned in the region where the color region 30 is to be formed ; and
Including an ultraviolet irradiation step of forming a color region 30 by irradiating ultraviolet rays on the stacked masking sheet 60,
In the second process, a plurality of color portions 32 having different colors are formed using a plurality of masking sheets 60 having different sizes of the exposure portions 62 for each masking sheet 60,
Let the lamination step of the masking sheet 60 and the UV irradiation step be one cycle, and the cycle proceeds a plurality of times,
As the number of cycles increases, the amount of UV light is accumulated using a masking sheet 60 having a small size of the exposure section 62 to form a plurality of color sections 32 having different colors 100. ) manufacturing method.
A method of using the ultraviolet test paper 100 according to any one of claims 1 to 5, wherein the ultraviolet test paper 100 is attached to the laminate 300, and then the ultraviolet irradiator 200 How to use the UV test paper 100 that is charged and used.
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