JP3192741U - Packaging sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging sheet capable of leaving a falsification-preventing opening mark with good appearance and reliably. SOLUTION: At least the first of a base sheet 14 which is a main body, a first printing layer 22 provided on the upper surface of the base sheet 14, and the upper surface of the base sheet 14 and the first printing layer 22. A second print layer 24 provided in an area including a portion of the print layer 22 is provided. The peel strength of the first print layer 22 with respect to the base sheet 14 is stronger than the peel strength of the second print layer 24 with respect to the first print layer 22). The fact that the second print layer 24 is peeled from the first print layer 22 can be identified by the visibility of the first print layer 22 at the peeled portion. [Selection diagram] Fig. 3

Description

  The present invention relates to a packaging sheet as a packaging material used for packaging boxes for storing articles, packaging bags, and the like.

  After packaging products etc. inside a packaging box etc. assembled with packaging sheets, it has been easy to determine whether or not they have been opened to prevent tampering by third parties illegally extracting or replacing the products etc. A plurality of techniques have been proposed in which an opening mark remains when a packaging box or the like is opened.

  For example, as disclosed in Patent Document 1, a packaging box with a lid is formed by using a paper packaging sheet, and an appropriate depth is formed in a box portion on a lid portion and a side portion serving as a sealing seal application surface. There was a sealing seal peeling prevention method in which an adhesive for sealing seal was permeated into the cutting line portion in a state where a cut line was provided and a sealing seal was attached. According to this method, since the sealing seal adhesive is thrown into the box, when the third party peels off the seal, the surface layer of the box breaks along the score line and the seal It can peel off together and leave a peel mark that cannot be erased.

  Further, as disclosed in Patent Document 2, it is a packaging sheet, and a coating layer (a pigment layer and a protective layer) is provided on a base sheet (support) and is attached to the surface of the coating layer. When the sealing seal is peeled off, each part is peeled off within the layer or between layers in the base sheet, and the entire coated layer is peeled off together with the surface layer of the base sheet without tearing the surface layer of the peeled base sheet. There was a paper cloth provided. In the case of this paper cloth, similarly to the above packaging box, if a third party peels off the sealing seal, it is possible to leave a peeling mark that cannot be erased on the base sheet.

Japanese Unexamined Patent Publication No. 53-97591 JP-A-9-176990

  In any of the techniques disclosed in Patent Documents 1 and 2, when the sealing seal is peeled off, a part of the surface layer of the base sheet is peeled off together with the sealing seal, and the inside of the base material sheet is exposed as a peeling trace. Because of the structure, it is difficult to improve the appearance of the peeling marks beyond a certain level. This peeling mark is always generated even when a legitimate user opens it, and there are many cases in which the packaging box is used for storage for a long time after opening. Therefore, if the appearance of the peeling mark is poor, it may harm the user and deteriorate the product image.

  The present invention has been made in view of the above-described background art, and an object thereof is to provide a packaging sheet that can leave a tamper-proof opening mark in a good-looking manner.

  The present invention is a packaging sheet used for packaging an article, which is a base sheet as a main body, a first printed layer provided on an upper surface of the base sheet, the base sheet and the first A second printed layer provided in a region including at least a portion of the first printed layer on the upper surface of the printed layer, and the peel strength of the first printed layer with respect to the base sheet is the first printed layer It is stronger than the peel strength of the second print layer with respect to one print layer, and the fact that the second print layer has peeled off from the first print layer indicates that the first print layer at the peeled portion It is a packaging sheet that can be identified by visibility.

  In this case, the base sheet is a paper material, and the first print layer is formed by offset printing using an oxidation polymerization type ink mixed with extender pigments, and the second print layer is It is preferable that the composition is formed by offset printing using an ultraviolet curable ink mainly composed of a photosensitive monomer and mixed with a predetermined pigment.

  Further, the present invention is a packaging sheet used for packaging articles, a base sheet that is a main body, a first printed layer provided on the upper surface of the base sheet, the base sheet and A transparent or translucent protective layer covering the upper surface of the first printed layer; and a second printed layer provided in a region of the upper surface of the protective layer including at least the portion of the first printed layer. The protective layer has a releasability for interfacial peeling of the second printed layer when a certain peeling force is applied to the second printed layer, and the second printed layer is the protective layer. It is the sheet | seat for packaging which can identify that it peeled from according to the visibility of said 1st printed layer in the peeled part.

  In this case, the protective layer is formed by coating an aqueous varnish mainly composed of styrene / acrylic acid copolymer and water, and the second printed layer is mainly composed of a photosensitive monomer. It is preferable that the structure is formed by offset printing using an ultraviolet curable ink in which a predetermined pigment is mixed. Further, the first printing layer is mainly composed of a synthetic resin and vegetable oil, and an ink in which a predetermined pigment is mixed therein, or a photosensitive monomer as a main component, and the predetermined pigment is contained in these. It is preferable that the composition is formed by offset printing using mixed ultraviolet curable ink.

  According to the packaging sheet of the present invention, when the sealing seal attached to the surface by the packaging is peeled off, the second printed layer is peeled together to form a peeling mark without damaging the base sheet. The appearance of the packaging is not deteriorated, and the tamper marks can be satisfactorily left in appearance. In addition, since the appearance of the opening mark can be freely changed using the display contents (characters, patterns, etc.) and color scheme of the first and second printed layers and the background pattern of the base sheet, the opening mark can be changed to a packaging box or packaging. It can also be actively used as part of the bag design. In particular, if the upper surface of the base sheet and the first printed layer is covered with a protective layer, the unsealed state can be kept clean for a long period of time.

  In addition, by selecting and combining each material of the base sheet, the first printing layer, the ink used for the second printing layer, and the protective layer as appropriate, it is available as a sealing seal at a low price instead of a special seal. A versatile seal with good properties can be used.

It is an expanded view of 1st embodiment of the sheet | seat for packaging of this invention. The perspective view (a) which shows the external appearance of the packaging box formed by assembling the packaging sheet of 1st embodiment, The expanded sectional view which shows the structure of the part which the cover piece was closed and was fixed to the front board with the sealing seal ( b). The expanded sectional view (a) which shows the structure of each printing part provided in the lid piece and front board of the packaging sheet of 1st embodiment, The top view which shows the external appearance of the printing part of the lid piece side (b) Front board side It is a front view (c) which shows the external appearance of a printing part. It is a figure (a), (b), and (c) which show a state after a seal sticker was stuck on the upper surface of each printing part shown in Drawing 3, and it was removed. The expanded sectional view (a) which shows the structure of the modification of each printing part provided in the lid piece and front plate of the packaging sheet of 1st embodiment, The top view (b) which shows the external appearance of the printing part by the side of a lid piece It is a front view (c) which shows the external appearance of the printing part by the side of a front board. It is a figure (a), (b), and (c) which show a state after a seal sticker was stuck on the upper surface of each printing part shown in Drawing 5, and it was removed. The expanded sectional view (a) which shows the structure of each printing part provided in the cover piece and the front plate of 2nd embodiment of the packaging sheet of this invention, The top view (b) which shows the external appearance of the printing part by the side of a cover piece FIG. 3C is a front view (c) illustrating an appearance of a printing unit on the front plate side. FIG. 8 is a diagram (a), (b), and (c) showing a state after a sealing seal is affixed to the upper surface of each printing unit shown in FIG. 7 and peeled off. It is the expanded view (a) which shows 3rd embodiment of the sheet | seat for packaging of this invention, and a perspective view (b) which shows the external appearance of the packaging bag formed by assembling this.

  Hereinafter, 1st embodiment of the sheet | seat for packaging of this invention is described based on FIGS. As shown in FIG. 1, the packaging sheet 10 of this embodiment is a box-shaped piece punched out from a single blank sheet, which is a packaging material such as cardboard, and is assembled into a rectangular parallelepiped. A typical packaging box 12 is formed.

  A paper sheet is used as the base material sheet 14 which is the main body of the packaging sheet 10. On the surface of the base sheet 14, product PR, handling instructions, etc. are displayed over a wide range. The functions of preventing tampering are the printing unit 16 provided in the portion on the insertion piece 14b side of the cover piece 14a and the printing unit 18 provided in the end portion near the cover piece 14a of the front plate 14c. is there.

  When assembling the packaging box 12 with the packaging sheet 10, first, a bottomed rectangular tube-shaped accommodation portion is formed, and the upper end opening thereof is opened and closed by the lid piece 14 a. Next, goods etc. are accommodated inside the accommodating part, the accommodating part is closed with the cover piece 14a, and the insertion piece 14b is inserted into the inner side of the front plate 14c and locked. In this state, the cover piece 14a and the front plate 14c intersect at a substantially right angle, and the printing parts 16 and 18 are continuous. Then, the sealing seal 20 is pasted so as to straddle the printing parts 16 and 18, the lid piece 14a is fixed to the front plate 14c, and the product or the like cannot be taken out unless the sealing seal 20 is peeled off.

  The sealing seal 20 is a transparent or translucent seal in which an adhesive layer 20b is provided on one side of the film layer 20a. The sealing seal 20 is slightly smaller than the continuous size of the printing parts 16 and 18, and is located inside the printing parts 16 and 18. Affixed to straddle.

  As shown in FIG. 3, the printing units 16 and 18 include a first printing layer 22 provided on the upper surface of the base sheet 14 and a first printing layer 22 provided on the upper surfaces of the base sheet 14 and the first printing layer 22. The first printing layer 22 represents the characters “OP” on the printing unit 16 side and the characters “EN” on the printing unit 18 side. The second print layer 24 is a solid having a size that covers the first print layer 22 in both the printing units 16 and 18.

  The first condition for providing the print layers 16 and 18 is that the peel strength ε (22-14) of the first print layer 22 with respect to the base sheet 14 (hereinafter, similarly, the reference numerals of the respective layers are attached to indicate the respective layers). Is greater than the peel strength ε (24-22) of the second printed layer 24 relative to the first printed layer 22. The second condition is that the second printed layer 24 is peeled off from the first printed layer 22 due to the difference in the color scheme of the respective layers 22 and 24, and the second printed layer 24 is peeled off from the portion where the second printed layer 24 is peeled off. That is, it can be identified by whether or not the print layer 22 is visible.

  Further, the sealing seal 20 has an adhesive strength σ (20-24) of the pressure-sensitive adhesive layer 20b to the second printed layer 24, and a peel strength ε (24-22) of the second printed layer 24 to the first printed layer 22. ) And a strength that is weaker than the peel strength ε (24-14) of the second printed layer 24 with respect to the base sheet 14 is selected (third condition).

  Here, since the base sheet 14 is a paper sheet, the first printing layer 22 is mixed with extender pigments (white) such as calcium carbonate and barium sulfate as a configuration that can easily realize the first and second conditions. The second printing layer 24 is mainly composed of a photosensitive monomer, and a predetermined pigment (the color of the first printing layer 22 is easily distinguished from each other). A configuration formed by offset printing using an ultraviolet curable ink in which colors (for example, black, red, blue, black, and green) are mixed is preferable.

  With such a configuration, as shown in FIGS. 3B and 3C, the first printed layer 22 is not visible in appearance, and the second printed layer 24 appears solid. Also, with this configuration, a general-purpose seal (for example, a seal having an adhesive layer mainly composed of an acrylic copolymer resin) can be used as the seal seal 20. That is, it is not necessary to prepare a special seal in order to realize the third condition.

  When opening the packaging box 12 with the sealing seal 20 affixed to the upper surfaces of the printing units 16 and 18, the user performs an operation of holding the end of the sealing seal 20 with a finger and peeling it off. Then, a force for peeling off the second printed layer 24 through the adhesive layer 20b is applied to the printing units 16 and 18. At this time, the adhesive strength σ (20-24) of the pressure-sensitive adhesive layer 20b with respect to the second print layer 24 is the same with respect to the first print layer 22 as to the portion where the first print layer 22 and the second print layer 24 overlap. Since the peel strength ε (24-22) of the second print layer 24 is stronger, the boundary surface between the first and second print layers 22 and 24 is broken, and the peeled portion of the second print layer 24 is sealed. It is removed together with the seal 20. On the other hand, for the portion where the second printed layer 24 and the base sheet 14 overlap, the adhesive strength σ (20-24) of the pressure-sensitive adhesive layer 20b to the second printed layer 24 is the second printed layer to the base sheet 14. The second printed layer 24 remains without being peeled from the base sheet 14 because it is weaker than the peel strength ε (24-14) of 24. As a result, as shown in FIG. 4, the first print layer 22 can be visually recognized from the portion where the second print layer 24 is removed, and white characters “OP” “ "EN" appears and becomes a peeling trace, and it can be identified that the second printed layer 24 is peeled off. Further, even if the peeled seal 20 is pasted back, the boundary surfaces of the first and second print layers 22 and 24 are broken, so that the characters “OP” and “EN” cannot be erased cleanly. Therefore, when the packaging box 12 has been tampered with, the fact can be reliably detected.

  As described above, according to the packaging sheet 10, when the sealing seal 20 affixed to the surface is peeled off, the base sheet 14 is damaged by peeling off portions of the second printed layer 24 together. In this case, the characters “OP” and “EN” appear and become peeling marks, so that it is possible to leave tamper marks with good appearance. Furthermore, it is possible to devise the character and pattern of the peeling trace and to actively utilize it as a part of the design of the packaging box 12. In particular, since the first and second print layers 22 and 24 are formed by offset printing, the degree of freedom in designing the peeling trace is high. Further, by combining the materials of the base sheet 14, the first printing layer 22, and the second printing layer 24 as described above, the sealing seal 20 is not a special seal but is inexpensive and highly available. Seals can be used.

  Further, as shown in FIG. 5, the printing units 16 and 18 of the packaging sheet 10 have the layout of the first and second printing layers 22 and 24 like the first and second printing layers 26 and 28. Can be changed. Here, both the printing parts 16 and 18 are the white solids of the 1st printing layer 26, and the 2nd printing layer 28 is provided in the upper surface inner side. The second print layer 28 represents a character “NE” on the printing unit 16 side and a character “W !!” on the printing unit 18 side. The material and color scheme of each layer are the same as those of the first and second print layers 22 and 24, and the first and second conditions are realized.

  When the sealing seal 20 is prepared, the adhesive strength σ (20-28) of the pressure-sensitive adhesive layer 20b with respect to the second printed layer 28 is the peel strength ε of the second printed layer 28 with respect to the first printed layer 26. It is stronger than (28-26), and the adhesive strength σ (20-26) of the pressure-sensitive adhesive layer 20b to the first printed layer 26 is the peel strength ε (26 of the first printed layer 26 to the base sheet 14. -14) Select a weaker one (third condition). This is slightly different from the third condition described above, but can be easily realized with a general-purpose seal.

  With such a configuration, as shown in FIGS. 5B and 5C, characters “NE” and “W !!” of a predetermined color appear on the inside of the solid of the first print layer 26 in appearance. appear. Then, when the sealing seal 20 is pasted and peeled off from the upper surfaces of the printing parts 16 and 18, the boundary between the first and second printing layers 26 and 28 is broken and peeled off as in the second printing. The entire layer 28 is removed together with the sealing seal 20 and the first printed layer 26 remains without peeling from the substrate sheet 14. As a result, as shown in FIG. 6, only the white solid of the first print layer 26 is visible (the letters “NE” and “W !!” have disappeared), so the second print layer 28 has peeled off. Can be identified. Moreover, even if the sealed seal 20 is peeled back, the characters “NE” and “W !!” cannot be displayed neatly because the second printed layer 28 is peeled off. Therefore, the same effects as those of the first and second print layers 22 and 24 can be obtained.

  Next, 2nd embodiment of the sheet | seat for packaging of this invention is described based on FIG. 7, FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted. The packaging sheet 30 of this embodiment is a box-forming piece punched from one blank sheet that is a packaging material such as cardboard, and a general square packaging box 32 is formed by assembling this. Can do. The outer shape of the packaging sheet 30 is the same as that of the packaging sheet 10 shown in FIG. 1, and the outer shape of the packaging box 32 is also the same as that of the packaging box 12 shown in FIG. The difference is the configuration of the printing units 16 and 18.

  As shown in FIG. 7, the printing units 16 and 18 are transparent or semi-covering the first printing layer 34 provided on the upper surface of the base sheet 14 and the upper surfaces of the base sheet 14 and the first printing layer 34. The transparent protective layer 36 includes a protective layer 36 and a second printed layer 38 provided on the upper surface of the first printed layer 34. The protective layer 36 is a layer that functions to protect the first printed layer 34 and the entire base sheet 14. Here, the first printing layer 34 represents the characters “OP” on the printing unit 16 side and the characters “EN” on the printing unit 18 side. The second print layer 38 is a solid having a size that covers the first print layer 34 in both the printing units 16 and 18.

  The first condition for providing the print layers 16 and 18 is that the protective layer 36 has a releasability that causes the second print layer 38 to be peeled off when a second or more peeling force is applied to the second print layer 38. It is that it has. Further, the second condition is that the second printed layer 38 is peeled off from the protective layer 36 due to the difference in the color scheme of the base sheet 14 and the layers 34, 36, 38. It is a point that it can be identified by whether or not the first printed layer 34 is visible from the portion.

  When the sealing seal 20 is prepared, the adhesive strength σ (20-38) of the pressure-sensitive adhesive layer 20b to the second printed layer 38 is equal to the adhesive strength σ (20-36) of the pressure-sensitive adhesive layer 20b to the protective layer 36. Select a stronger one (third condition).

  As a configuration capable of easily realizing the first and second conditions, the protective layer 36 is formed by coating an aqueous varnish mainly composed of a styrene / acrylic acid copolymer and water, and the second printed layer 38. However, a structure formed by offset printing using an ultraviolet curable ink in which a photosensitive monomer is a main component and a predetermined pigment (for example, white) is mixed with the photosensitive monomer is preferable. Thereby, the third condition can be easily realized by a general-purpose seal.

  The first print layer 34 has a wider selectable range than the protective layer 36 and the second print layer 38, and includes, for example, a synthetic resin and vegetable oil as main components, and a predetermined pigment (second print layer). 38 may be formed by offset printing using an ink mixed with 38 colors and black, etc., or a UV curable type in which a photosensitive monomer is a main component and a predetermined pigment is mixed in the ink. A configuration formed by offset printing using ink is preferable.

  With such a configuration, as shown in FIGS. 7B and 7C, the first printed layer 34 is not visible in appearance, and the second printed layer 38 appears white. Then, when the sealing seal 20 is attached to the upper surface of the printing parts 16 and 18 and peeled off, a certain level of force is applied to peel off the second printed layer 38 through the adhesive layer 20b, and the second printed layer 38 The inner portion is peeled off from the protective layer 36, and the peeled portion of the second printed layer 38 is removed together with the sealing seal 20. The first printed layer 34 remains as it is while being covered with the protective layer 36. As a result, as shown in FIG. 8, the first printed layer 34 can be visually recognized from the portion where the second printed layer 38 has been removed, and black characters “ “OP” and “EN” appear and become peeling traces, and it can be identified that the second printed layer 38 has peeled. Further, even if the peeled seal 20 is attached, the characters “OP” and “EN” cannot be erased cleanly because the boundary between the second printed layer 38 and the protective layer 36 is peeled off. Therefore, when the packaging box 32 has been tampered with, the fact can be reliably detected.

  As described above, according to the packaging sheet 30, it is possible to obtain the same operational effects as the packaging sheet 10, and to further improve the appearance of the peeling marks as compared with the packaging sheet 10. In the case of the packaging sheet 10 according to the first embodiment, the boundary surface between the first and second printed layers 22 and 24 is a structure that is broken, so that depending on the angle and speed when the sealing seal 20 is peeled off, the second In some cases, a part of the print layer 24 remains on the surface of the first print layer 22 and the peeling trace does not become clean. However, the packaging sheet 30 of this embodiment has a structure in which the protective layer 36 has releasability from the second printed layer 38 and the second printed layer 38 and the protective layer 36 are peeled off at the interface. Regardless of the angle or speed at which the sealing seal 20 is peeled off, the second printed layer 38 is almost completely removed, and a beautiful peeling mark can be left.

  Next, 3rd embodiment of the sheet | seat for packaging of this invention is described based on FIG. Here, the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 9, the packaging sheet 40 of this embodiment is a bag forming piece punched out from a single blank sheet, which is a packaging material such as cardboard, and is assembled into a thin product. A square packaging bag 42 can be formed.

  The surface of the base sheet 44, which is the main body of the packaging sheet 40, displays product PR and handling instructions in a wide range, and functions to prevent tampering at the tip of the sealing piece 44a. And the printing unit 18 provided at a position near the edge of the back plate 44b and the sealing piece 44a. The material of the base sheet 44 is the same as that of the base sheet 14 described above.

  When assembling the packaging bag 42 with the packaging sheet 40, first, the back plate 44b and the front plate 44c are folded and glued pieces 44d are glued to the back plate 44b to form an accommodating portion, and the upper end opening is sealed. The piece 44a can be opened and closed. Next, goods etc. are accommodated inside the accommodating part, and the accommodating part is closed with the sealing piece 44a. In this state, the sealing piece 44a overlaps the back plate 44b, and the printing parts 16 and 18 are continuous. Then, the sealing seal 20 is pasted so as to straddle the printing parts 16 and 18, the sealing piece 44a is fixed to the back plate 44b, and the product or the like cannot be taken out unless the sealing seal 20 is peeled off. The configuration of the printing layers 16 and 18 is the same as that of the printing layers 16 and 18 provided on the packaging sheet 10 or the packaging sheet 30.

  The packaging sheet 40, which is a bag-forming piece, can be used in the same manner as the packaging sheets 10, 30, which are box-forming pieces, although the usage is slightly different.

  The packaging sheet of the present invention is not limited to the above embodiment. For example, the base sheet that is the main body of the packaging sheet uses a material other than a paper sheet (for example, a synthetic resin sheet). In this case, the materials for the first and second print layers and the material for the protective layer are appropriately selected so that the above-described effects can be obtained. The same applies to the layout and color selection of the first and second print layers. In particular, when designing the layout of the first and second print layers, it should be noted that the peel strength of each layer can be adjusted by changing the areas of the first and second print layers.

  Moreover, the sealing seal used in combination with the packaging sheet of the present invention can be appropriately selected so as to obtain the above-described effects. For example, in order to increase the adhesive strength of the pressure-sensitive adhesive layer, a strong-adhesive seal (for example, having a pressure-sensitive adhesive layer in which an acrylic copolymer resin is mixed with hydrogenated rosin pentaerythritol ester) may be used. In consideration of the characteristics, a colored transparent seal may be used.

A prototype of the packaging sheet 10 of the first embodiment was made. The base sheet 14 was a paper sheet. The formation method of the printing parts 16 and 18 is as shown in Table 1.

  When the peel-off mark was evaluated using the general-purpose sealing seal 20 for the wrapping paper sheet 10 produced as a prototype, a good-looking and clean peel-off trace appeared.

A prototype of the packaging sheet 30 of the second embodiment was made. The base sheet 14 was a paper sheet. The formation method of the printing parts 16 and 18 is as shown in Table 2.

  When the peel-off mark was evaluated using the general-purpose sealing seal 20 for the prototype packaging paper sheet 30, the second printed layer 38 was almost completely removed, and a good-looking and beautiful peel-off trace appeared. .

10, 30, 40 Packaging sheet 12, 32 Packaging box 14, 44 Base sheet 22, 26, 34 First printing layer 24, 28, 38 Second printing layer 36 Protective layer 42 Packaging bag

Claims (5)

In the packaging sheet used for packaging of goods,
A base sheet as a main body; a first printed layer provided on an upper surface of the base sheet; and at least a portion of the first printed layer on the upper surface of the base sheet and the first printed layer. A second printed layer provided in the region,
The peel strength of the first print layer with respect to the base sheet is stronger than the peel strength of the second print layer with respect to the first print layer, and the second print layer is separated from the first print layer. The packaging sheet, which can be identified by the visibility of the first printed layer at the peeled portion.   The base sheet is a paper material, the first print layer is formed by offset printing using an oxidation polymerization type ink mixed with extender pigment, and the second print layer is a photosensitive monomer. The packaging sheet according to claim 1, wherein the sheet is formed by offset printing using an ultraviolet curable ink in which a predetermined pigment is mixed. In the packaging sheet used for packaging of goods,
A base sheet as a main body, a first printing layer provided on the top surface of the base sheet, a transparent or translucent protective layer covering the top surface of the base sheet and the first printing layer, and A second printed layer provided in a region including at least a portion of the first printed layer on the upper surface of the protective layer;
The protective layer has a releasability for interfacial peeling of the second printed layer when a certain peeling force is applied to the second printed layer, and the second printed layer is separated from the protective layer. The packaging sheet, which can be identified by the visibility of the first printed layer at the peeled portion.   The protective layer is formed by coating an aqueous varnish mainly composed of a styrene / acrylic acid copolymer and water, and the second printed layer is mainly composed of a photosensitive monomer, and a predetermined pigment is added thereto. The packaging sheet according to claim 3, which is formed by offset printing using an ultraviolet curable ink mixed with. The first printing layer is mainly composed of a synthetic resin and a vegetable oil, and an ink in which a predetermined pigment is mixed therein, or a photosensitive monomer as a main component, and the predetermined pigment is mixed in the ink. The packaging sheet according to claim 4, which is formed by offset printing using an ultraviolet curable ink.

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