JPH1088086A - Adhesive label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-adhesive label which is stuck to corrugated fiberboard or is used for sealng a corrugated fiberboard box, is similar in hand and color tone to corrugated fiberboard, is excellent in adaptabilities to thermal transfer recording and printing, and can be easily stamped with a water-base ink. SOLUTION: This label comprises a substrate paper 1 made mainly from pulp, a self-adhesive layer 2 formed on the reverse side thereof, and a release sheet 3 stuck to the self-adhesive layer 2. The substrate paper 1 contains 30-100wt.% (based on the total pulp content; the same applies below) unbleached kraft pulp or contains 20-100wt. % waste paper pulp and 0.01-1.0wt.% coloring pigment and/or dye, has a basis wt. of 20-120g/m<2> , has such a color tone that the values of L, a, and b in the expression according to JIS P 8730 are 50-65, 1-10, and 10-25, respectively, and has a Bekk smoothness of the right side of 100-500sec and that of the reverse side of 1-30sec.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive label attached to a cardboard for display or an adhesive label for sealing a cardboard box.

[0002]

2. Description of the Related Art In general, a cardboard box is used for storing, transporting, and storing various products and commodities. In order to indicate information of contents stored in the cardboard box, a cardboard box is usually used in advance. It is printed and used when making boxes. However, in order to use a cardboard box printed at the time of box-making in order to ship a wide variety of products, it is necessary to always stock a large amount of each cardboard box of each display even with the same size cardboard box. Whenever the contents are changed and the display of the cardboard box is changed, it is necessary to change the plate used for printing each time,
The operation is very complicated. Also, cardboard paper is
Under the influence of the corrugation of the corrugated cardboard, the liner on the corrugated cardboard also has irregularities, resulting in insufficient smoothness.
It is also difficult to apply a clear print such as a bar code on the cardboard surface.

[0003] Therefore, by using a label in which the information of the contents is previously printed and attached to a cardboard box, the information can be easily and quickly written on a large number of cardboard boxes. , Packaging, display, and shipping can be performed efficiently with machinery. However, even though the conventional label is suitable for printing, when pasted on a cardboard box, the surface material of the label is different from the surface paper used for cardboard, for example, high quality paper, PVC, PE
Because the film of T, PP, etc. is used, the color and material (base material) of the label part will be different when affixed to the cardboard, which will damage the texture of the original cardboard box printed at the time of box making. there were.

Conventionally, in the case of a kraft adhesive tape mainly used for sealing cardboard boxes, a resin layer made of a thermoplastic resin such as polyethylene is provided on one side of kraft paper by a laminating method or the like, and if necessary. The resin layer is smoothed using a super calender, and a release agent is applied on the resin layer so that the adhesive of the adhesive tape does not adhere. Since the release agent layer of craft adhesive tape is usually coated with a highly water-repellent release agent,
In general, clear printing and printing cannot be obtained by thermal transfer recording or letterpress printing, and the aqueous stamp ink repels and cannot be stamped.

In order to print on the release agent layer of the kraft pressure-sensitive adhesive tape, for example, Japanese Patent Laid-Open No. 5-14 / 1999 discloses a method in which the release agent layer is repeatedly subjected to corona discharge treatment for printing.
No. 8461. However, this method has a drawback in that the type of ink to be printed is limited, and the ink on the printed surface easily falls off due to friction between cardboard during transportation or the like. Furthermore, when sealing a cardboard box, it was not possible to seal with a stamp using water-based ink or to stamp a lot number, a production date, and the like.

Further, as a label upper paper having a color tone and a texture similar to cardboard, there is, for example, a label based on kraft paper which has been processed by Krupak. However, it is difficult to obtain clear prints and images by thermal transfer recording, and there is a problem such as print omission in letterpress printing. Liner (K liner,
In the case of B liner, C liner, and D liner), the color tone and texture of the paper are the same as those of cardboard, but the surface smoothness of the paper is insufficient, the printability is poor, and the basis weight is generally large. Even if the label is processed, it is considered that the repelling force of the paper is so strong that the label is peeled off due to the curved surface adhesiveness or “I stick” when sealing the cardboard box.

[0007]

SUMMARY OF THE INVENTION A pressure-sensitive adhesive label for application to a cardboard or for sealing has a texture and color tone similar to that of a cardboard, is excellent in thermal transfer recording suitability and printability, and can be stamped with a water-based ink stamp. It is to provide an adhesive label that can be used.

[0008]

Means for Solving the Problems The adhesive label of the present invention comprises:
A pressure-sensitive adhesive label comprising a pressure-sensitive adhesive layer provided on the back surface of a base paper mainly composed of pulp, and a release sheet bonded to the pressure-sensitive adhesive layer, wherein the base paper comprises: 30 to 100% by weight in the raw material, or (b) 20% waste paper pulp in the total pulp raw material
To 100% by weight, and 0.01 to 1.0% by weight of a color pigment and / or a dye based on the whole pulp raw material, and the basis weight of the base paper is 20 to 120 g / m ² , It is characterized by satisfying the following conditions (1) and (2). (1) In the display defined by JIS P 8730, the L value is 50 to 65, the a value is 1 to 10,
The b value is in the range of 10 to 25. (2) The Beck smoothness of the front surface of the base paper is 100 to 500 seconds, and the smoothness of the back surface is 1 to 30 seconds.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an adhesive label to be attached to a cardboard, which has a feeling printed on the cardboard and excellent printing characteristics, and can be stamped with a water-based ink stamp after being attached to the cardboard. As a result of diligent research on, papermaking of base paper (top of label) using specific pulp, and keeping the color tone of the base paper after paper making and the smoothness of the front and back surfaces of the base paper within specified ranges It has been found that the above-mentioned problem can be solved.

Although the constitution of the pressure-sensitive adhesive label of the present invention is not particularly limited, for example, as shown in FIG.
An adhesive layer 2 is formed on the back side of the label upper paper 1, and a release paper 3 coated with a release agent on at least one side is attached to the adhesive application side of the label.
Further, if necessary, a primer may be interposed between the back surface of the label paper and the adhesive layer.

The label base paper of the present invention contains pulp as a main component, and contains a specific amount of unbleached kraft pulp or waste paper pulp, and the color tone of the base paper has an L value in the display specified in JIS P 8730. 50-65, a value is 1-1
It is important that the 0 and b values are in the range of 10 to 25,
When affixed to a cardboard or sealed, a pressure-sensitive adhesive label having a color tone and texture similar to a cardboard can be obtained. Also, the whiteness W of the base paper specified in JIS L 1013
(Lab) is preferably from 35 to 63%.

As unbleached kraft pulp, for example, NU
Unbleached wood pulp such as KP, LUKP,
It is used in the pulp raw material in an amount of 30 to 100% by weight, preferably 50 to 100% by weight. If the amount of unbleached kraft pulp is less than 30% by weight, a color tone and texture similar to cardboard cannot be obtained. Other chemicals such as a sizing agent, a retention agent, and a paper strength agent are added.

[0013] In the case of waste paper pulp, 2
A dye or a color pigment is added to papermaking pulp in an amount of 0 to 100% by weight to reproduce the same color as kraft paper mainly containing unbleached kraft pulp. As the dye, a water-soluble dye is preferably used. For example, a direct dye, a basic dye, an acid dye, a sulfur dye, a disperse dye, a leuco dye and the like are used, and particularly, an amine salt or a quaternary ammonium salt type water-soluble base is used. Sex dyes are preferably used. As the color pigment, for example, an azo pigment or a polycyclic pigment is used. The total used amount of the coloring pigment and the dye is 0.01 to 1.0% by weight based on the whole pulp raw material. When mixing the color pigments and dyes in the pulp solution, the color pigments and dyes are appropriately dispersed, the permeability to the pulp fiber is increased, and in order to facilitate the coloring, a pH adjuster, a pigment water dispersant, A surfactant, a fixing agent and the like are appropriately blended.

[0014] The basis weight of base paper is ^{20~120g / m 2, 50~90g / m} 2 is preferred. Basis weight 20g / m
If it is less than ^2, the strength of the base paper decreases, which hinders the use of cardboard sealing. On the other hand, if it exceeds 120 g / m ² , the paper stiffness (repulsion force) becomes strong, and the curved surface adhesion and the cardboard sealing property are increased. Cause trouble.

The base paper of the present invention uses unbleached kraft pulp or waste paper pulp as a raw material for pulp. These can be used in combination, and according to quality requirements, for example, semi-bleached wood pulp. Wood pulp such as bleached wood pulp, or cotton pulp, straw pulp, bamboo pulp, bagasse pulp, Manila hemp pulp, hemp pulp, mulberry pulp, goose pulp, honey pulp and the like can also be used in combination.

Examples of the internal sizing agent include alkyl ketene dimer sizing agent, alkenyl succinic anhydride sizing agent, stearic anhydride sizing agent, petroleum resin sizing agent, petroleum resin sizing agent, rosin sizing agent, Wax-based sizing agents and the like can be mentioned. Retention agent,
Examples of the drainage improver include Al, Fe, Sn, and Z.
n and other polyvalent metal compounds (sulfuric acid bands, aluminum chloride, etc.). Examples of the paper strength enhancer include various raw starches, various processed starches, various polyacrylamides, various polyvinyl alcohols, and the like. In addition, as a wet paper strength enhancer,
Melamine-formaldehyde resin, urea-formaldehyde resin, epoxidized polyamide polyamine resin, polyethyleneimine, and the like.

Surface sizing can be performed mainly for the purpose of improving the surface strength. As a surface sizing agent,
For example, various processed starch, various polyacrylamide, various polyvinyl alcohol, carboxymethyl cellulose,
Acrylic ester copolymer, 1-olefin-maleic anhydride copolymer, styrene-acrylic copolymer,
Latex and the like can be mentioned.

In general, the paper base material used on the surface of corrugated cardboard is mostly a K liner mainly using unbleached pulp and a jute liner (D liner, C liner, B liner) containing a large amount of waste paper. . In recent years, the percentage of waste paper contained in paper has been increasing, and pigments and dyes exhibiting colors such as yellow, red, blue, and green are mixed in the pulp of the surface layer of the K liner or the jute liner to make the paper yellow. By coloring so as to give a brown color, the color tone of the unbleached pulp is adjusted to make paper. The color tone of the cardboard using the liner is yellow to brown. The surface of the adhesive label paper of the present invention has a natural texture similar to these cardboards,
And a color tone.

In the present invention, in order for the surface of the base paper to have excellent suitability for thermal transfer recording and printing, and for the back surface of the base paper to have good adhesion to the adhesive, the surface of the base paper must be smoothed. It is necessary that the degree is 100 to 500 seconds and the back surface Beck smoothness is 1 to 30 seconds. Here, the Beck smoothness is a value specified in JIS P 8119. When the smoothness of the surface of the base paper is less than 100 seconds, the printing is apt to occur during thermal transfer recording or printing, and the image becomes unclear. On the other hand, it is considered that the higher the surface smoothness, the better the thermal transfer recording suitability and the printability. However, at present, the upper limit of the smoothness obtained as kraft paper is about 500 seconds.

When the Beck smoothness of the back side of the base paper is 1 to 30 seconds, when the pressure-sensitive adhesive is applied (particularly when the pressure-sensitive adhesive is applied by a transfer method), the adhesive impregnation rate of the base paper is And the adhesive strength between the pressure-sensitive adhesive coating layer and the paper is moderate. If the Beck smoothness of the back surface exceeds 30 seconds, the amount of the adhesive impregnated into the base paper becomes insufficient, the adhesion strength between the pressure-sensitive adhesive coating layer and the paper is not sufficiently exhibited, and the Beck smoothness of the back surface is also reduced. Is less than 1, on the contrary, the amount of the adhesive impregnated in the paper becomes excessive, and the adhesive is exuded on the base paper to cause "staining" on the label paper, which is not preferable in appearance. The adhesive impregnation rate of the base paper is preferably 5 to 30% by weight of the applied amount of the adhesive.

As a method of increasing the smoothness of the base paper surface and lowering the smoothness of the back surface of the base paper, for example, in a drying method in a paper making process such as a Yankee dryer, only one side of a wet paper is a mirror cylinder. It is possible to obtain a single-sided smooth base paper by drying in contact with
Generally, the smooth F side can be used as the base paper front side, and the W side can be used as the base paper back side. If necessary, it is also possible to adjust the smoothness by a super calendar process.

As paper having a difference in smoothness between the front and back sides, wrapping paper such as single-gloss kraft paper, bleached single-gloss kraft paper, and pure white roll paper is known. Among them, one-sided kraft paper is
Its color tone and appearance are similar to those of cardboard, and it can be subjected to adhesive processing to obtain a desired adhesive label for cardboard applications.

The pressure-sensitive adhesive used in the pressure-sensitive adhesive label of the present invention may be a conventionally known pressure-sensitive adhesive. For example, natural rubber mainly composed of isoprene, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene- Rubber-based pressure-sensitive adhesives mainly composed of rubber such as styrene copolymer (SBS) and silicone rubber.
An acrylic pressure-sensitive adhesive mainly containing an acrylic ester or methacrylic ester of No. 18 is widely used. In order to improve the adhesive performance of the rubber-based pressure-sensitive adhesive or acrylic pressure-sensitive adhesive, a tackifier, oil, a cross-linking agent, or the like may be blended and used.

In order to make the waste paper raw material with the label attached to the cardboard, the water-soluble or water-swellable adhesive is used in order to simplify the step of removing the pressure-sensitive adhesive from the label when manufacturing the waste paper raw material. It is preferred to use some adhesive. The water-swellable pressure-sensitive adhesive or the water-soluble pressure-sensitive adhesive is composed of a copolymer having an unsaturated carboxylic acid-containing monomer and an acrylate-based monomer as constituent units, and the copolymers are entangled or cross-linked, It is a pressure-sensitive adhesive that has properties such as finite expansion or dissolution upon contact with water. Further, in practice, when it is necessary to change the water solubility or the adhesive properties of the pressure-sensitive adhesive, a hydrophilic plasticizer or a hydrophilic epoxy compound which is generally used may be used in combination with the water-swellable pressure-sensitive adhesive. Good. Examples of such a water-swellable pressure-sensitive adhesive or water-soluble pressure-sensitive adhesive include, for example,
An adhesive described in JP-A-9-23294 can be used.

The coating amount of the pressure-sensitive adhesive is set in accordance with the conditions and purpose of use of the pressure-sensitive adhesive label.
Preferably ^{150g / m 2, 5~100g / m} 2 is more preferable. Generally, as an adhesive label for cardboard use, the adhesive force specified in JIS Z 0237 is preferably 50 to 5,000 gf / 25 mm for a SUS plate, and 50 to 2,500 for a cardboard.
It is preferably about gf / 25 mm, and does not peel off in a normal use environment. For example, when a label is attached to a cardboard box and the cardboard box is reused, it is necessary to cleanly remove the label from the cardboard box, and the adhesive strength to the SUS plate is preferably 50 to 1,000 gf / 25 mm. Adhesive strength is 50-500
gf / 25 mm is preferable.

As a method for producing a pressure-sensitive adhesive sheet, a pressure-sensitive adhesive is usually applied to a release agent-coated layer of a release paper, and dried if necessary to obtain a pressure-sensitive adhesive-coated layer. Taken. A method may be used in which the pressure-sensitive adhesive is directly applied to the paper on the label, bonded to the release agent-coated surface of the release paper, and wound. It is desirable that the adhesive applied surface has no foaming or unevenness. If the adhesive applied surface has irregularities due to foaming, uneven application, or the like, the upper paper of the label also has an irregular shape, and the printing suitability at the time of printing and printing is reduced.

The release sheet is provided on one or both sides of the substrate, a silicone-based release agent containing polyoxysiloxane as a main component, a polymer having a long-chain alkyl group, a fluororesin,
It is obtained by applying a release agent such as shellac resin. The coating amount of the release agent layer is such that the coating amount after drying is 0.01 to 5 g / m ^2.
Is preferable, and 0.01 to 3 g / m ² is more preferable. As the base material for the release sheet, for example, polyethylene terephthalate (PET), biaxially oriented polypropylene (OP)
P), paper such as polyvinyl chloride (PVC), high-quality paper, glassine paper, kraft paper, impregnated paper, and the like, or those obtained by laminating the above paper or those coated with a filler layer are usually used. It is preferable to apply a pressure-sensitive adhesive and dry it with hot air so as to have less unevenness.

[0028]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto. In the following, “parts” and “%” all indicate “parts by weight” and “% by weight”.

Example 1 NUKP 80 parts, LUKP 20
Parts, cationic starch 0.2 parts, acrylamide-based paper strength enhancer (trade name: Polystron 191, Arakawa Chemical Industry Co., Ltd.)
And 5,000 parts of water.
A wet paper is formed by a paper machine, and one side (front side) of the wet paper is brought into close contact with the surface of a Yankee dryer to reduce the moisture content from 75% to 1%.
Drying to 0% gave a base paper of 60 g / m ² . Also,
As a release sheet, a silicone-based release agent (trademark: KS-772, manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to a base paper of blue glassine paper 82 g / m ^{2 so} that the coating amount after drying is 1.0 g / m ^2. Was applied with a Mayer bar and dried to obtain a release paper. A commercially available acrylic pressure-sensitive adhesive (trademark: AT-5) is applied to the release paper.
48, manufactured by Saiden Chemical Co., Ltd.)
Apply with a comma coater so as to be 0.0 g / m ² ,
After drying, the pressure-sensitive adhesive coated surface and the rough surface (back side) of the label paper were adhered to produce a pressure-sensitive adhesive label. The adhesive strength of the obtained adhesive label was measured based on JIS Z 0237, and the adhesive strength to a SUS plate was 2,000 gf / 25.
mm.

Example 2 As label paper, 100 parts of waste paper pulp, 0.2 parts of cationic starch, 0.2 parts of acrylamide-based paper-strengthening agent (trade name: Polystron 191, Arakawa Chemical Industry Co., Ltd.), 5,000 parts of water and a cationic dye (Paper F
After mixing 5 parts of Ast Brown Z-BRK (manufactured by Bayer K.K.), a wet paper is formed with a paper machine, and one side (front side) of the wet paper is brought into close contact with the surface of a Yankee dryer to reduce the moisture content from 75%. 60 g after drying to 10%
/ M ² . An adhesive label was produced in the same manner as in Example 1 except that the obtained base paper was used as the label paper.

Comparative Example 1 A semi-bleached kraft paper of gold color (trade name: OK Gold, manufactured by Shin-Oji Paper Co., Ltd., 70 g /
except using m ²⁾ is to prepare a pressure-sensitive adhesive label in the same manner as in Example 1.

Comparative Example 2 Cream-colored high-quality paper (trade name: OT) was used as the label paper.
An adhesive label was obtained in the same manner as in Example 1 except that cream, Shin-Oji Paper Co., Ltd., 70 g / m ² ) was used.

Comparative Example 3 An adhesive label was obtained in the same manner as in Example 1 except that 81.4 g / m ^{2 of high-} quality paper was used as the upper paper of the label.

Evaluation Method The pressure-sensitive adhesive labels (or used label papers) obtained in the above Examples and Comparative Examples were evaluated by the following methods, and the results are shown in Table 1. In the following evaluations, the O level is suitable for practical use, but the Δ level or less is insufficient and not suitable for practical use. [Color tone of the upper paper] The color tone of the upper paper surface is based on JIS P 814.
Using a photoelectric colorimeter (trade name: Spectral Whiteness Colorimeter SC-10WN, manufactured by Suga Test Instruments Co., Ltd.) specified in 8 as a standard light C, the tristimulus value in a 2 ° field of view was JI
The L value, a value, and b value specified in SZ8730 were determined.

[Beck Smoothness] The Beck smoothness of the front and back of the upper paper was measured based on JIS P8119.

[Hand feeling of label] The hand feeling of the label may be K-7 liner (trade name: NRK liner 280).
g / m ² , manufactured by Honshu Paper Co., Ltd.), a label was applied to a cardboard paper having a surface substrate, and the texture of the label and the cardboard was visually observed to perform a sensory evaluation. (Evaluation criteria) ：: The color tone and texture of the cardboard surface and the label portion are very similar. ：: The color tone of the cardboard surface and the label part are very similar, and the texture is slightly different. Δ: The color tone and texture of the cardboard surface and the label portion are considerably different. X: The color tone and texture of the cardboard surface and the label part are completely different.

[Printing Suitability] (a) Thermal Transfer Printing Suitability Thermal transfer recording suitability was evaluated using a word processor (trade name: OASYS L).
X-2000, manufactured by Fujitsu Ltd.)
The sensory evaluation was performed by visually observing print unevenness of characters printed at 00 dpi (10.5 point characters: 60 × 60 dots) at a print speed of 190 characters / second. (Evaluation criteria) ：: No printing unevenness (printing loss). Δ: Printing unevenness (printing missing) is small. ×: Printing unevenness (printing missing).

(B) Topographic printing aptitude RI tester (trade name: RI-3, manufactured by Akira Seisakusho Co., Ltd.)
Using black ink for offset (trade name: Graf-
G, manufactured by Dainippon Ink and Chemicals, Inc.) was weighed in an amount of 0.2 ml, uniformly kneaded using a rubber roll having a Shore hardness of 75, and then transferred onto the label paper at a speed of 30 m / min. The transfer unevenness of the ink transferred to the paper surface of the label was visually observed and sensory evaluated. (Evaluation criteria) ：: No transfer unevenness. Δ: Transfer unevenness is small. X: Transfer unevenness is present.

(C) Suitability for stamp printing As a stamp ink, a shachihata sol stamp stand H-3 (black) manufactured by Shachihata Industry Co., Ltd. was used for stamp printing, and the unevenness of printing of characters after 1 minute was visually observed. Observation and sensory evaluation were performed. (Evaluation criteria) ：: No printing unevenness (printing loss). Δ: Printing unevenness (printing missing) is small. ×: Printing unevenness (printing missing).

[Adhesive Impregnation Rate] The adhesive impregnation rate was calculated from the following equation. (Adhesive impregnation rate (% by weight)) = A / B × 100 Here, A represents the impregnated amount of the adhesive, and B represents the applied amount of the adhesive, each of which is calculated by the following formula. A (g / m ² ) = (substrate weight after removing adhesive) − (substrate weight before applying adhesive) B (g / m ² ) = (substrate weight after applying adhesive) -(Substrate weight before applying adhesive)

[Adhesiveness of pressure-sensitive adhesive] The adhesiveness of the pressure-sensitive adhesive was determined by laminating the pressure-sensitive adhesive surfaces of the pressure-sensitive adhesive labels, peeling in a 180 ° direction (“T” peel), and observing the peeling state of the pressure-sensitive adhesive surface. (Evaluation criteria) ：: Peeling between the pressure-sensitive adhesive layer / pressure-sensitive adhesive layer or paper tear. Δ: The state of peeling on the paper surface / adhesive-coated surface appears randomly. ×: Peeled off on the paper surface / adhesive coated surface.

[0042]

[Table 1]

As can be seen from Table 1, the pressure-sensitive adhesive labels obtained in the examples have a color tone on the label paper surface of 50 to 65, a value of 1 to 10, and b value of 10 to 10 in Lab display.
25, has a texture very similar to a cardboard, and the smoothness of the paper surface on the label is in the range of 100 to 500 seconds, so that it is excellent in thermal transfer suitability, print suitability, stamp printability, and on the label. Since the smoothness of the back surface of the paper was in the range of 1 to 30 seconds, the adhesiveness of the adhesive to the base paper was good.

[0044]

According to the present invention, a sticky label having a texture and color tone similar to that of cardboard, having excellent heat transfer recording suitability and printability, and capable of being stamped with a water-based ink stamp is practically used in applications for sticking to and sealing cardboard. This will greatly contribute to the industry.

[Brief description of the drawings]

FIG. 1 is an example of a side view showing a configuration of an adhesive label of the present invention.

[Explanation of symbols]

 1: Label paper (base paper) 2: Adhesive coating layer 3: Release paper

Claims (1)

[Claims] 1. A pressure-sensitive adhesive label comprising a pressure-sensitive adhesive layer provided on the back surface of a base paper containing pulp as a main component, and a release sheet bonded to the pressure-sensitive adhesive layer, wherein the base paper comprises (a)
30 to 100% by weight of unbleached kraft pulp in the whole pulp raw material, or (b) 20 to 100% by weight of the waste paper pulp in the whole pulp raw material, and the coloring pigment and / or dye based on the whole pulp raw material. 0.01 to 1.0% by weight
And the basis weight of the base paper is 20 to 120 g / m ^2.
And an adhesive label satisfying the following conditions (1) and (2). (1) In the display defined by JIS P 8730, the L value is 50 to 65, the a value is 1 to 10,
The b value is in the range of 10 to 25. (2) The Beck smoothness of the front surface of the base paper is 100 to 500 seconds, and the smoothness of the back surface is 1 to 30 seconds.