JPH01272930A - Energy beam dosage measurement sheet - Google Patents

Abstract

PURPOSE:To measure the time integral quantity of an irradiation quantity even on a working line which uses an energy irradiation source for an electron beam and X rays by providing an active layer which colors, discolors, or fades through the operation of an energy beam on one surface of a base. CONSTITUTION:The active layer 1 and an energy beam absorption layer 2 are laminated on the base 4 and an energy-beam absorption layer 3 is provided on the other side of the base 4. Further, active layers 1 and 1' which differ in sensitivity to the energy beam are provided on both sides of the base 4, and energy beam absorption layers 2 and 3 may be provided on the respective active layers. In this case, the active layers which differ in sensitivity to the energy beam are combined so that they, e.g., differ in coloring speed, one colors and the other fades, or their fading speeds are different. Then a compound which colors through the operation of the energy beam is a combination of an initiator which produces an active seed like a free radical or acid through the operation of the energy beam and a coloring agent which colors through the mutual operation with the active seed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sheet for measuring the dose of energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams.

<Prior art> Treatment processes using energy lines such as ultraviolet rays, visible light, X-rays, and electron beams are used in the production of paints, printing plates, photoresists, adhesives, hard coatings for films, adhesives, foamed polyolefins, etc. It has been put into practical use in a variety of industries, including sterilization of medical instruments and sterilization of food and drinking water.

In such an energy beam treatment process, the irradiation dose is the most fundamental factor, and various dosimeters have been put into practical use. Among them, it changes color depending on the dose,
A so-called label-type dosimeter that measures irradiation dose based on the degree of discoloration has features such as simplicity and speed that allow the irradiation dose to be visually evaluated.

<Problems to be Solved by the Invention> However, conventional label-type dosimeters require that the energy irradiation source be activated in order to determine the degree of discoloration of the label due to the action of energy rays based on the light reflected from the label. When measuring, it was necessary for the energy irradiation source and the observer to be located on the same side with respect to the discolored side of the label. For this reason, in work using energy irradiation sources such as electron beams and X-rays, it has been difficult to measure on-line, especially to measure the cumulative amount of irradiation over time on line 11. Furthermore, when storing a discolored label, there is a problem in that the degree of discoloration changes due to exposure to external light such as indoor light.

Means for Solving the Problems> The present invention provides a novel energy ray dose measurement sheet that improves the problems of the label type energy ray dosimeter and satisfies the required performance.

The present inventor has completed the present invention as a result of intensive research into energy ray dose measurement sheets that include an active layer that develops, discolors, or fades due to the action of energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams. .

That is, the present invention provides an energy beam which has a small number of supports and is characterized in that an active layer that develops, discolors, or discolors due to the action of energy beams is provided on one side, and that both outermost layers are provided with engineered radiation absorbing layers. The first invention is a dose measuring sheet, characterized in that an active layer that develops, changes color or fades in color due to the action of energy rays and an energy ray absorbing layer are sequentially laminated on at least one side of an energy ray absorbing support. - A second invention is the Nerky dose measurement C I.

Detailed explanation of the present invention-4 is given below.

First, the structure of the energy ray dose measurement sheet of the present invention will be described. FIGS. 1 and 2 show the structure of a radiation dose measuring sheet according to the first aspect of the present invention. In other words, FIG. 1 shows an example of a sheet in which an active layer 1 and an energy ray absorbing layer 2 are laminated on a support 71-1-, and an energy ray absorbing layer 3 is provided on the other side of the support. In addition, FIG. 2 shows that active layers 1 and 1' having different sensitivities to Nerky radiation are provided on both sides of the support 4, and energy ray absorbing layers 2 and 3 are further provided on each active layer. In this case, the active layers having different sensitivities to energy rays refer to, for example, different coloring speeds, a combination of coloring and fading, or a combination of different coloring speeds.

Next, FIGS. 3 to 5 relate to the second aspect of the present invention. That is, FIG. 3 shows a structure in which an active layer 1 and an energy ray absorbing layer 2 are laminated on an energy ray absorbing support 5, and FIG. Two types of active layers with different sensitivities to energy rays 1
．． 5 is an example of a sheet in which the energy ray absorbing layer 2 is provided on the laminated layers of the energy ray absorbing support 5. Furthermore, FIG. Layers 1 and 1' are provided, and energy ray absorbing layers 2 and 3 are further provided between each active layer.

In addition, in FIGS. 1 to 5, the Yuulkyi ray absorption layer 2 provided as the outermost layer is an absorption layer that adjusts the dose of energy rays emitted from the energy ray irradiation source to be measured and incident on the active layer 1, Also, the other energy ray absorption layer 3
is an absorption layer that controls energy rays other than the energy rays to be measured from entering the active layer. Color development of active layer,
In order to judge the degree of discoloration or fading through the energy ray absorption layer 3, the energy ray absorption layer 3 needs to be transparent to at least -5= at least a part of visible light. On the other hand, when the measurement location is indoors, there is indoor light and external light such as sunlight entering through a window, and the energy rays that can enter the active layer from +1 of the energy ray absorbing layer 3 are It has the function of effectively preventing these T-energy rays from reaching the active layer. As a result, color development, discoloration, fading, etc. of the measurement sheet due to the action of external light can be prevented.

To measure the energy ray dose, for example, the energy ray absorbing layer 2 shown in FIG.
The degree of discoloration is determined from the side of the energy ray absorption layer 3 in the figure.

Next, the constituent materials of the present invention will be described. The active layer of the present invention is a layer containing a composition that causes color changes such as color development, discoloration, or fading due to the action of energy rays such as ultraviolet rays, visible light, Xw, and electron beams. Known techniques can be used.

Compositions that develop color due to the action of energy rays include:
A combination of an initiator that generates active species such as free-6 radicals or acids by the action of the energy rays and a coloring agent that develops color by interaction with the active species can be used.

Initiators for producing freelasinol include organic halogen compounds, such as carbon tetrabromide, 1,1,14-lis(bromomethyl)propane, phenyltribromomethylsulfone, p-nitrophenyltribromomethylsulfone, 2
, 4-dichlorophenyltrichloromethylsulfone, hexabromodimethylsulfoxite, hexabromodimethylsulfone, 4,4-dibromo-2,3-hexanedione, 4-phenoxy-dichloroacetophenone, 0
-Nitro-α, α, α-tribromoacetophenone and the like are exemplified.

Further, as an acid-generating initiator, aromatic onium salts such as diphenyliodonium tetrafluoroborate,
Examples include diphenyliodonium hexafluorophosphate, triphenylsulfonium hexafluorophosphate, bis(4-methoxyphenyl)phenylsulfonium hexafluorophosphate-1.

Coloring agents include triphenylmethane, fluoran, rhodamine lactam, fetchacin, and phthalide compounds, such as his(4-dimethylaminophenyl)phenylmethane (leucomalachite green) and tris(4-dimethylaminophenyl). ) Phenylmethane (
leuco crystal violet), bis(4-diethylamino-2-methylphenyl)phenylmethane, bis(
4-diethylamino-2-methoxyphenyl)phenylmethane, tris(4-diethylamino-2-methylphenyl)methane, his(4-dibenzylamino-2-methylphenyl)phenylmethane, 4-methoxyphenyl-
Bis(1-ethyl-2-methylindol-3-yl)
Methane, phenyl-bis(1-n-butyl-2-methylindol-3-yl)methane, 3-diethylaminobenzo(a)-fluorane, 3-dimethylamino-6-methyl-7-chlorofluorane, 3- Cyclohexylamino-6-chlorofluorane, 3-(N-methyl-N-phenylamino)-6-(N-ffL-N-p-tolylamino)fluorane, ethyl amino-7-chlorofluorane, 3-dimethylamino-6-methyl-7-
Chlorofluorane, 3-(N-cyclohexyl-N-methylamine)-6-methyl-7-anilinofluorane,
3-pyrrolisino6-methyl-7-anilinofluorane, 3-(N-ethyl-N-isopentylamino)-6-
Methyl-7-anilinofluorane, 3-(N-ethyl-N-furfurylamino)-6-medy-7-anilinofluorane, 3-diethylamino-7-(m-fluoroanilino)fluorane, 3, 6-ethylaminofuno and oran-ω-p-nitrophenylimidolactam, 3.
6-dinithylaminofluorane-ω-p-chlorophenylimidolactam, 3,7-bis(dimethylamino)-
10-hendiylphenothiacin, 3,7-bis(dimethylamino)-10-acetylphenothiazine, 3.3
-Bis-dimethylaminophenyl-6-dimethylaminophthalide (crystal violet lactone), 3.3
-His-dimethylaminophenyl phthalide (Malachi I
・Green lactone), 3.3-bis(1-ethyl-2
-methylindol-3-yl)-phthalide, 3,3-
bis(1-butyl-2-methylindol-3-yl)
-phthalide, 3,3-bis(l-octyl-2-methyl-4-no-d-3-yl)phthalide, and the like.

Compositions that change color or fade due to the action of energy rays include compositions containing various pigments such as diphenylmethane, triphenylmethane, thiazine, oxacin, xanthine, anthraquinone, iminonaphthoquinone, azomethine, etc. Alternatively, compositions containing various pigments such as monoazo-based, disazo-based, triphenylmethane-based, and metal complex salt-based pigments can be used. Furthermore, for the purpose of accelerating the rate of fading or discoloration, a composition can be used in which the above-mentioned initiator is combined with these dyes or pigments.

Specific examples of the aforementioned pigments include crystal violet, bromophenol blue, bromocresol purple, tetrabromophenol blue, bromothymol blue, thymol blue, tripeolin, methyl yellow,
Examples include methyl orange, methyl red, New I Ral red, cresol red, indigo carmine, bromophenol red, tropeolin, alizarin yellow R1 congolete, phenolphthalein, thymolphthalein, and the like.

Further, specific examples of pigments include Hanzai Elo-561 Henshishinii Hair Row GR1 Palkan First Yellow G1 Hansa Yellow 3R, I''-Kuchi-HR, Permanent Orenshi GTR, Varnonon Orenshi, Cromophthal Orenshi 4 R, Permanen I Pol I” F G R% Brilliant First Scarlet, Lakelet D
Examples include 1 Permanent Carmine F F3 B'i Rhodamine 3B Lake, Hif I Reapure Blue Lake, Dianisidine Blue, Naftoi Green B, and the like.

The active layer in the present invention comprises the above-mentioned composition and a polymeric binder having film-forming properties, such as cellulose derivatives such as ethylcellulose, cellulose acetate, hydroxypropylcellulose, nitrocellulose, cellulose acetate butyrate, and cellulose acetate propionate. ,
Polyvinyl chloride, arsenic chloride, -hinyl acetate copolymer,
= 11-vinyl chloride copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl alcohol copolymers, ethylene-vinyl chloride copolymers, etc. polystyrenes such as polystyrene-butylene-acrylonitrile copolymers, polyacrylic acid esters,
Acrylic resins such as polymethacrylic acid esters and their copolymers, butyral resins, ebotoshi resins, alkyd resins, phenol resins, saturated copolymerized polyester resins, coating resins such as fluororesins, polycarbonates,
Solvents (e.g., methanol, ethanol, isopropanol, , toluene, xylene, ethyl acetate, isobutyl acetate, acetone, 2-butanone, 4-methyl-2
-Pentanone, cyclohexanone, tetrahydrofuran, dioxane, methylene chloride, chloride; lum,
2-Siku [''Roetan, 1,1. (2) It is prepared by coating a coating liquid obtained by dispersing and dissolving it in trichloroethane, chlorohenzene, hexane, heptane, cyclohexane, dimethylacetamide, dimethyl sulfoxide) on a support.

There are no particular limitations on the quantitative proportions of each component in the active layer, but preferred examples are as follows.

In the case of coloring layer Color former 10 parts Initiator 0.01-100 parts Polymer binder 1-1000 parts For discolored and faded layers Dye or organic pigment 10 parts Initiator 0-100 parts Polymer binder 1-1000 parts Moreover, the thickness of the active layer is 0.1 to 1100 u.

Preferably it is 0.5 to 50μ+n.

Furthermore, it is also possible to laminate two or more of the above-mentioned active layers, for example, a laminate of coloring layers with different coloring speeds, a laminate with color-changing layers or fading layers with different color-changing or fading speeds, a laminate of a color-forming layer and a color-changing layer, or A laminate with a fading layer is possible. Such a laminate can be provided by coating a second layer on a first layer on a support, with the first layer on one side of the support and the second layer on the other side. There are methods such as coating a first layer and a second layer on separate supports and bonding them together via an adhesive layer.

Next, in the present invention, transparent or translucent sheet-shaped supports are used to coat the active layer, and include cellophane films, polyester films, cellulose triacetate films, polycarbonate films, nylon films, fluororesin films, and polyethylene films. , polypropylene film, polyarylate film, TPX film, etc.

Furthermore, in the present invention, as shown in FIGS. 3 to 5, an energy ray absorbing support having a function of adjusting the energy rays emitted from the irradiation source and reaching the active layer can be used. Examples of energetic ray-absorbing supports include polyester films and polybonate films containing energy ray absorbers or pigments, polyester films dyed with dyes, colored and transparent polyimide films, polyamide-imide films, and polyphenylene films. Examples include sulfide films, and polyester films on which metals such as aluminum, tin, and indium or metal oxides such as zinc oxide, titanium oxide, indium oxide, tin oxide, and bismuth oxide are vacuum-deposited or sputter-deposited. .

In the present invention, an energy ray absorption layer is provided on one side of the active layer and adjusts the energy rays emitted from the energy ray source and reaches the active layer, and an energy ray absorption layer is provided on the other side of the photoactive layer and is provided on the other side of the photoactive layer. As the energy ray absorbing layer that adjusts the energy rays emitted from sources other than the source, for example, external light and reaching the active layer, a layer containing a composition that has absorbency for the energy rays can be used.

The energy rays that act on the active layer vary depending on the composition of the active layer, but examples include near ultraviolet rays and ultraviolet rays with a wavelength of 450 nm or less. Conventionally known ultraviolet absorbers can be used in the composition having absorbency in such a wavelength region. Benzotriazole-based ultraviolet absorbers,
There are compounds such as benzophenone, salicylate, and cyanoacrylate, and more specifically, 2-(5-methyl-2-hydroxyphenyl)benzotriazole, 2
-(3,5-di-t-butyl-2-hydroxyphenyl)hensitriazole, 2-(3,5-di-t-pentyl-2-hydroxyphenyl)benzotriazole,
2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,2°-dihydroxy-4,4'-dimethoxybenzophenone, 2.2',
4.4'-te dihydroxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 4-t
-butylphenyl salicylate, 4-octylphenyl salicylate, ethyl-2-cyano-3,3-diphenylacrylate, 2-ethylhexyl-2-cyano-3
, 3-dihydroxyacrylate and the like. Furthermore, examples of substances having absorption properties in the above wavelength range include fine particles of inorganic substances such as zinc oxide, titanium oxide, tin oxide, bismuth oxide, tungsten oxide, barium titanate, and zinc oxide. Furthermore, depending on the composition of the active layer, it is possible to make the layer active against visible light of about 450 nm or more, and in such cases, it is possible to use various dyes, pigments, etc. that absorb the active light. can.

To provide an energy-ray absorbing layer containing the energy ray-absorbing substance described above, the above-mentioned substance is mixed with a film-forming polymeric binder such as ethyl cellulose, hydroxypropyl cellulose, nitrocellulose, cellulose acetate butyrate, cellulose acetate propionate. Cellulose derivatives such as Nate, polyvinyl chloride, vinyl chloride copolymers such as vinyl chloride-vinyl acetate copolymers, vinyl chloride-acrylic copolymers, ethylene-vinyl acetate copolymers,
Ethylene copolymers such as ethylene-vinyl alcohol copolymer and ethylene-vinyl chloride copolymer, styrene copolymers such as borisdyrene, styrene-butadiene copolymer, and styrene-acrylonitrile copolymer, polyacrylic acid ester , acrylic resins such as polymethacrylic acid esters and their copolymers, epoxy resins, alkyd resins, phenol resins, saturated copolymerized polyester resins, coating resins such as fluororesins, polyoxycarbonates, polyarylates, polysulfones, polyethers Salkhon,
Solvents (
For example, methanol, ethanol, isopropanol, benzene, toluene, xylene, ethyl acetate, isobutyl acetate, acetone, 2-butanone, 4-methyl-2-pentanone, cyclohexane, tetrahydrofuran, dioxane, methylene chloride, chloroporm, 1,2- A coating liquid obtained by dispersing and dissolving in dichloroethane, 1,1,1-trichloroethane, chlorobenzene, hexane, heptane, cyclohexane, dimethylacetamide, dimethyl sulfoxide, etc.) was applied on the active layer and on the side where no active layer was provided. All you have to do is coat it on the support. In addition, an active layer is provided (
The active layer may be coated on a non-containing support, then the active layer may be coated on another support, and then the two may be bonded together via an adhesive layer or the like. Furthermore, J described in the section of the support
A flannel strip-line absorbent support can be used for this layer, and in this case, the active layer and the absorbent support can be laminated together.

In addition, the quantitative ratio of the absorbing substance and the polymer binder in the energy ray absorbing layer is 1 part of the former to 0.1 to 0.1 part of the latter.
], the range of 0 parts is suitable, and the thickness of the layer is in the range of 1 to 1.00 μn1. Preferably it is 05 to 50μIll.

1-. Using the energy ray dosimetry sheet of the present invention obtained by the following procedure, various J Nerky radiation sources, such as high-pressure mercury lamps, ultra-high-pressure mercury lamps, metal halide lamps,
It is possible to measure the irradiation dose of energetic rays such as ultraviolet rays, X-rays, and electron beams emitted from various lamps such as germicidal lamps and ion lamps, and from X-ray and electron beam irradiation devices. It is also possible to measure the cumulative irradiation amount or sunshine hours of solar rays on agricultural greenhouses, outdoor buildings, office windows, etc. Furthermore, it can be used for stationery, toys, etc., and for example, it is possible to directly measure the amount of ultraviolet rays in sunlight.

EXAMPLES The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.

Example 1 An active layer coating liquid prepared with the following formulation ω was applied to both sides of a 50 um thick polyester film, and the J'X after drying was 15 um.
The active layer was provided so as to have a thickness of m.

Next, on the active layer, an energy ray absorbing layer coating liquid having the following formulation (ii) is applied to form an energy ray absorbing layer having a thickness of 50 um. : Got the measurement sheet. The sheet to be measured was a transparent film layer with a slightly pale yellow color.

(ii) Next, attach this measurement sheet to the inside of the glass wall of a food sterilization case using a germicidal lamp with a lamp power of 30W, so that the absorption layer with a thickness of 15 μm is placed on the glass wall side. An energy beam with a wavelength of 253.7 parts m was irradiated. Energy ray intensity at measurement sheet position is 10mW
/cw? Met. This measurement sheet gradually begins to develop a black color as soon as the sterilizing lamp starts turning on, and the color density increases in proportion to the increase in the irradiation amount, and when the irradiation amount is 10'mJ/cnt or more, the color density becomes saturated and remains constant. Became. For comparison, in a measurement sheet without a 15 μm thick absorption layer, color development progressed due to the action of indoor light even under conditions where the germicidal lamp was not turned on.

Example 2 An active layer coating solution prepared with the following formulation 2l-GiD was applied onto a polyimide film having a thickness of 3 Bpm to provide an active layer having a thickness of 10 um after drying.

G11) Next, a 38μ polyimide film was pasted onto the above active layer via an adhesive layer to obtain an energy dose measurement sheet of the present invention. The measurement sheet was a transparent film layer colored bright yellow.

This measurement sheet was attached to the crow wall of the food sterilization case using the same procedure as in Example 1, and a lighting test using a sterilization lamp was conducted.

This display sheet developed a blue color when the germicidal lamp was turned on, and the color density increased in proportion to the irradiation amount. and 108mJ/
At an irradiation dose of ci or more, the color density became constant.

Example 3 An active layer coating liquid prepared with the following formulation (c) and an energy ray absorption layer coating liquid prepared with formulation (v) were applied to both sides of a 100 μm thick polyester film, and the thickness after drying was determined. An active layer with a coating thickness of 15 μm was provided.

Gv) Next, the absorption layer coating liquid of formulation (v) was coated on the active layer to form an absorption layer with a thickness of 20 μm, thereby obtaining an energy dose measurement sheet of the present invention. The measurement sheet was a transparent film layer colored pale yellow.

(v) The color development characteristics were evaluated by changing the irradiation dose.

As a result, the measurement sheet was colored red by electron beam irradiation, and the color density increased in proportion to the irradiation dose. At an irradiation dose of 20 megarads or more, the color density became saturated and became constant.

Example 4 An energy dose measuring sheet of the present invention was obtained by following the same procedure as in Example 1 except that an active layer coating liquid prepared with the following formulation (b) was used instead of formulation (i) in Example 1.

This measurement sheet had a bright orange colored film layer.

Suzuki conducted a lighting test on the measurement sheet of the present invention using the same procedure as in Example 1.

As a result, the color fading of the measurement sheet of the present invention progressed as the light was turned on, and 10'mJ10n? The element became colorless and transparent at the above irradiation amount.

Example 5 The active layer coating liquid of formulation (i) and the coating liquid of formulation (ii) of Example 1 were applied to both sides of a 38 μm thick polyester film to form an active layer and an absorbent layer each having a film thickness of 15 μm. Established. Next, the active layer coating liquid of the arrangement part of Example 4 and the absorption layer coating liquid of the formulation (v) of Example 3 were coated on both sides of another polyester film with a thickness of 15 μm.
A dosimetry sheet of the present invention having a laminated structure was obtained by adhering via an active layer and an absorption layer of .mu.m. This measurement sheet was a transparent film colored pale yellow.

The measurement sheet of the present invention was attached in the same manner as in Example 1 so that the absorbing layer was located on the inner wall of the glass, and a lighting test using a germicidal lamp was conducted.

As a result, in the measurement sheet of the present invention, the active layer first began to discolor when the light was turned on, and the discoloration progressed in proportion to the increase in the lighting time, and the discoloration was approximately 10' mJ/c11? A transparent layer with a slight bluish tinge was obtained at an irradiation dose of . If you continue to turn on the light,
The blue color development of the active layer progresses in proportion to the increase in lighting time10
'mJ/cI+? The color density became constant at the above irradiation amount.

Example 6 An active layer coating liquid of the following formulation &ltl and an absorption layer coating liquid of formulation (c) were sequentially coated on a 50 μm thick ultraviolet absorbing polyester film (manufactured by Toyobo ■), each having a film thickness of 1.
An energy ray dosimetry sheet of the present invention was obtained comprising an active layer and an absorbing layer of 0IjI11 and 15 μm.

It was attached to the outside of the shaft. At this time, the 15 μm absorbing layer was directed toward the atmosphere. The sheet of the present invention began to develop a green color upon irradiation with sunlight, and the color density increased in proportion to the increase in sunlight time.The color density became saturated and became constant after about 240 hours of sunlight or more. .

Example 7 In the active layer of Example 6, the coating liquid of formulation 1viD was used instead of the coating liquid of formulation (ilo), and in the absorption layer, formulation M
An energy ray dose measurement sheet of the present invention was prepared in the same manner as in Example 6, except that a 38 um thick polyimide film was used instead of the id coating liquid, and an irradiation test using outdoor sunlight was conducted.

As a result, the measurement sheet of the present invention develops a blue color when exposed to sunlight, and the color density increases in proportion to the increase in sunlight hours, and the color density reaches saturation at about 2,000 hours of sunlight. It became constant.

Examples 8 to 12 In formulation (i) in Example 1, the compounds shown in Table 1 were used in place of 3-(N-ethyl-N-isopentylamino)-6-methyl-7-anilinofluorane. Except for this, an energy ray dose measurement sheet of the present invention was prepared using the same procedure as in Example 1, and a germicidal lamp lighting test was conducted. The results are shown in Table 1.

[Margin below]

1 29- ^1 <Effects of the Invention> Since the present invention has the above configuration, when measuring the dose while the energy ray irradiation source is in operation, the irradiation source and the observer do not need to be located on the same side. Therefore, even in work lines that use energy irradiation sources such as electron beams and X-rays, it has become possible to measure the cumulative amount of irradiation over time on the line.

[Brief explanation of the drawing]

1 to 5 are diagrams showing the layer structure of the energy ray dose measurement sheet of the present invention.

Claims (1)

[Claims] (1) A sheet for measuring energy ray dose, characterized in that an active layer that develops, discolors, or fades in color by the action of energy rays is provided on at least one side of the support, and energy ray absorbing layers are provided on both outermost layers, ( 2) A sheet for measuring energy rays, characterized in that an active layer that develops, changes color, or fades in color due to the action of energy rays and an energy ray absorbing layer are sequentially laminated on at least one side of an energy ray absorbing support.