JP3190010B2 - Roll film for photography - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic roll film, and more particularly, to a long photographic film in which at least one end is bonded to the surface of a back light-shielding paper or a leader light-shielding paper by a bonding tape. A photographic roll film.

[0002]

2. Description of the Related Art A photographic roll film, which is generally called by the name of a brownie film, has a wide and long shape using a light-shielding paper on a cylindrical winding shaft (generally called a spool). It is in the form of a photographic film wound around it.
Unlike 135 type photographic film, which is generally called 5 mm film, it is not stored in a magazine (or patrone). This brownie film has a short type called 120 size, and 220
There are two types of long type called size. In the former, the whole photographic film is backed and supported by light-shielding paper (back light-shielding paper), and in the latter, the leader light-shielding paper slightly overlaps the both ends of the photographic film. It is joined while forming. The joining between the light-shielding paper or the leader light-shielding paper and the long photographic film is performed by using a separately prepared bonding tape.

A brownie film is advantageous for obtaining a photographic image having a large screen, and its demand has been gradually increasing in recent years. However, the complexity of mounting it on a camera has been a problem in widespread use. That is, in the most commonly used 35 mm film and camera system, the 35
Information related to mm film (type of photosensitive material such as monochrome, negative color, positive color, photographic sensitivity, film length, etc.) is recorded as an electrically readable signal on the outer surface of the magazine containing the film. Have been. Then, when the photographic film is mounted on the camera, an electric signal reading device provided in the camera operates to read relevant information of the mounted photographic film, and according to the information, operating conditions of the camera side. Is set automatically. Therefore, the operator does not need to set complicated operating conditions for the camera. On the other hand, since such magazines are not prepared for brownie films, all operators (photographers) need to manually set the relevant information of the photographic film to be used in the camera.

[0004] In order to solve the above complications in using a brownie film, the present inventor has developed a barcode in which relevant information of the film is recorded on a partial area of the brownie film, particularly on the surface of a bonding tape. Has already invented a system that can automatically read the barcode by an optical reading device provided on the camera side and automatically set operating conditions on the camera side. (Japanese Patent Application No. 7-235127).

[0005]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application No. Hei.
In the novel brownie film provided with the barcode described in the specification of the 5127 application, when the brownie film is mounted on a camera, information on the photographic film is automatically read by the camera side, and necessary settings are set. Since it is performed automatically, the operator does not need to perform complicated input operations, and since incorrect settings are not performed,
The use of such a photographic film is very advantageous in practice. For this reason, the inventor of the present application has continued research to further examine the practical problems. As a result, the above systems often operate as intended, reducing the complexity of the operator (photographer) and allowing the camera to automatically enter the necessary photographic film-related information. However, it has been found that occasionally, a bar code cannot be read by an optical reader provided on the camera side. That is, in the above-mentioned novel brownie film system, it is practically advantageous to attach a bar code to a joining tape for joining a photographic film and a light-shielding paper (or a leader light-shielding paper). Repeated bar code reading tests were performed using a bonding tape printed with a bar code pattern combining a bonding tape with a surface and a black material of a normal light absorbing bar. Occasionally, the bar code reading device on the camera side read the bar code reading test. The disability has been found to occur.

[0006] When the photographic film-related information becomes unreadable, it can be solved by using a manual related information setting device provided in advance on the camera side. Needless to say, occurrences should be avoided as much as possible. In addition, erroneous recognition of a signal is a serious problem. For this reason, the present inventor has further studied to investigate the cause of the occurrence of the inability to read the barcode on the bonding tape, and to search for a solution therefor. As a result, the inability to read or misread the bar code in question is caused by the bending of the joining tape in the bar code area (the area composed of the white light reflecting area and the black light absorbing bar) on the joining tape. It was found to be due to deformation of the coding region. That is, the bonding tape, when bonding the photographic film and the light-shielding paper, even on the back light-shielding paper, or leader light-shielding paper, in any case,
Since a step corresponding to a film thickness of about 100 μm is formed at the joint, deformation is likely to occur, and a normal brownie film is stored in a tightly wound state around a small diameter spool. Since it is used, the above-mentioned step tends to be amplified and fixed. On the other hand, when reading a barcode, the barcode surface is illuminated by irradiating the barcode surface with light for reading from an optical reader and then receiving a pattern of scattered reflected light emitted from the barcode surface on a light receiving surface. To read recorded information. According to the research of the present inventor, the deformation such as a large step or a curl formed in the barcode area reduces the amount of scattered reflected light to be received or corresponds to a barcode pattern actually received. It has been found that it can cause a shift between the light reflection / absorption pattern and the bar code pattern that should be read.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a photographic roll film in which at least one end of a long photographic film is bonded to a back light-shielding paper or a leader light-shielding paper by a bonding tape. A bar code in which film-related information including at least photographic sensitivity relating to the long photographic film is recorded on the surface of the joining tape, and reflects and absorbs irradiation light having a wavelength other than the photosensitive wavelength region of the photographic film, respectively. A bar code that is automatically readable by an optical reader provided inside a camera loaded with the photographic roll film, the bar code being composed of a light reflecting space and a light absorbing bar capable of being read. The reflectance of the light reflecting space of the bar code with respect to the irradiation light is 50% or more, the glossiness is 35% or less, Rate is 30% or less, glossiness of 20
% Or less, and the sum of the glossiness of the light reflection space and the glossiness of the light absorbing bar is 50% or less, and is equivalent to the light reflection space at a position parallel to the bar code on the surface of the joining tape. A photographic roll film provided with a reference region for correcting a reading error having the surface condition described above.

The reflectance specified in the present invention is 900 ± 50.
It refers to the reflectance of the spectral reflection spectrum in the range of nm, and can be measured using a commercially available spectrophotometer. The glossiness means a value specified in JIS Z8741 (60-degree specular glossiness), and can be measured by using a commercially available glossmeter. In the photographic roll film of the present invention, a reference area for reading error correction (a reference area for a light absorbing bar) having a surface state equivalent to that of a light absorbing bar at a position parallel to the bar code on the surface of the bonding tape. Is preferably provided.

Preferred embodiments of the photographic roll film of the present invention are described below. (1) The reflectance of the light reflecting space to the irradiation light is 60
% Or more, and the glossiness is 30% or less (more preferably 20%
The above-mentioned roll film for photography which is the following. (2) The above photographic roll film, wherein the reflectance of the light absorbing bar to the irradiation light is 10% or less and the glossiness is 18% or less. (3) The photographic roll film described above, wherein the sum of the glossiness of the light reflecting space and the glossiness of the light absorbing bar is 40% or less. (4) The photographic roll film described above, wherein the surface of the light absorbing bar is matted. (5) The photographic roll film described above, wherein the photosensitive area of the photographic film is in the range of 400 to 700 nm.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The construction of the photographic roll film of the present invention and the method for producing the same will be described in detail below.
Improvement of the photographic roll film of the present invention is mainly based on 12
The present invention is applicable to 0 type and 220 type brownie films, but the present invention can be advantageously used as long as it is a type of photographic roll film in which a light-shielding paper and a long photographic film are bonded with a bonding tape. Because you can
There is no limitation on its size or type. As the light-shielding paper or the long photographic film, any of those conventionally used or known can be used. If desired, the light-shielding paper may be provided with a deformation or processing (such as formation of a hole at an end) to assist or assure a secure engagement with the spool.

A typical structure of the photographic roll film of the present invention is shown in plan and side views in FIGS. 1 and 2, respectively. That is, a typical form of the photographic roll film of the present invention is composed of a long photographic film 11 and a light-shielding paper 12 like an ordinary brownie film. 13, and a bar code 14 having specific optical characteristics is formed on the surface of the bonding tape 13. In the side area of the bar code, a reading error correction reference area 15 having a surface equivalent to the surface of the light reflecting space of the bar code and having the same light reflectance and glossiness.
Is provided. This reference area 15 is normally secured using the surface of the bonding tape as it is.

The bar code reading operation using the photographic roll film of the present invention and the error correction operation using the reference area of the light reflecting space are performed by, for example, two optical reading devices as shown in FIG. (Optical sensor) 16 and 17 are used. That is, the bar code 14 and the reference area 15 on the joining seal surface of the roll film moving in the length direction in the camera are simultaneously and simultaneously detected by the optical sensors provided at positions suitable for reading in the camera. After reading, the light reflection pattern obtained from the reading of the bar code 14 is transferred to the reference area 15.
Is automatically corrected using a correction signal obtained by reading the data, for example, using a microcomputer or the like. That is, in this way, it is possible to avoid a reading error such as a reading error of a bar code due to a deformation of the bar code 14 caused by a step formed from the end of the photographic film 11 and the surface of the light-shielding paper 12. It becomes possible.

FIG. 4 shows, in addition to the reference area 15 of the light reflecting space provided in parallel with the bar code 14,
Further, a bonding tape provided with a reference region 18 of a light absorbing bar is shown. Using this bonding tape and three optical sensors 16, 17, 19 as schematically shown in FIG.
By performing the reading operation and the correcting operation as described with reference to FIG. 3, it is possible to more effectively avoid a reading error occurring when reading a barcode on the bonding tape.

According to the present invention, as described above, a bar code is formed on the surface of the joining tape, and a surface state equivalent to the light reflection space (particularly in terms of light reflectance and gloss) is provided at a position parallel to the bar code. ) Is provided.
It is also preferable to provide a reference region having a surface state equivalent to that of the light absorbing par.

According to the present invention, as described above, a bar code having specific optical characteristics (the reflectance and glossiness of the light reflecting space and the light absorbing bar, respectively) is printed on the surface of the bonding tape (including thermal transfer). ) Or a method in which a barcode is formed by pasting a printed piece of paper, and a reference area for reading error correction is secured beside the barcode. The barcode is usually composed of a light reflecting space which is a background area (ground area) and a light absorbing bar which is usually colored black.

For the light reflecting space, a material having a high light reflectance and a low gloss is selected from a material such as an opaque white sheet such as a normal high-quality paper, a coated paper, and an opaque synthetic paper. It is formed by utilizing. Therefore, among the white sheets having high light reflectivity generally used for the base material of the bar code (the base material for forming the light reflection space),
It is necessary to select one with low gloss.

The light-absorbing bar formed on the base material of the barcode needs to have a low light reflectance like a normal barcode, and also have a sufficiently low gloss.
A device is required to form a preferable light absorbing bar having such a low glossiness. For example, on the surface of the sheet having a matte surface, a thermal transfer coloring ink composed of a coloring agent such as carbon black or a basic base dye and a thermoplastic binder was applied, and a thermal transfer ink layer having a matte surface on the back surface was formed. Thereafter, a method of thermally transferring the ink layer to the surface of the barcode substrate can be used. By the thermal transfer method of the ink layer whose back surface is matted, a light absorbing bar having low reflectance and low gloss can be provided on the surface of the barcode substrate.

Examples of the support of the thermal transfer sheet used in the above thermal transfer method include polyester film, polycarbonate film, triacetyl cellulose film,
Plastic film such as polyamide film and regenerated cellulose film, and chemically treated paper such as glassine paper and condenser paper, with a thickness of 2 to 30 μm
Some of them can be mentioned. A physical pattern such as unevenness may be formed on the surface of these supports. These concavo-convex patterns can be formed, for example, by subjecting the surface of the support to a treatment such as sandblasting or solvent corrosion, so that the surface has a roughness of 1000 seconds or less in Beck smoothness. Alternatively, it is also advantageous to form a matted undercoat layer comprising a binder and a granular inorganic white pigment such as titanium dioxide (white carbon), silica, calcium carbonate, etc. on the support of the thermal transfer sheet. By forming the matted undercoat layer, it is not necessary to form physical unevenness (matting) on the surface of the thermal transfer ink layer. For the formation of the matte surface, it is also advantageous to use a powder of an organic polymer substance such as cellulose fiber, urea resin powder, polymer beads and the like. In the case where a plastic film is used as the support, the surface of the back side (the surface opposite to the surface on which the heat transferable ink layer is provided) is treated with a fatty acid or a fatty acid in consideration of the workability of the subsequent heat transfer treatment. It is also preferable to provide a stick prevention layer made of a silicone resin or the like.

The thermal transfer ink comprises a coloring material (pigment or dye) and a thermoplastic binder.
If desired, non-colored pigments, plasticizers, lubricants and the like may be added supplementarily. Examples of preferred thermoplastic binders include waxes such as carnauba wax, microcrystalline wax, styrene-butadiene copolymer, ethylene-vinyl acetate copolymer, vinyl chloride-
Examples thereof include thermoplastic resins such as vinyl acetate copolymer, polybutyral resin, polyester resin, ethyl cellulose, and natural rubber. In order to form a matted surface on the thermal transfer ink layer, a resin soluble in a specific solvent and an insoluble resin are mixed to form a thermal transfer ink layer, and then the ink is formed with the specific solvent. A matted surface can also be formed by treating the surface of the layer. Alternatively, a thermosetting resin such as an unsaturated polyester, an epoxy resin, or a urethane resin may be mixed with a thermoplastic binder and used. The ratio of the coloring material (particularly the particulate coloring pigment) to the binder in the thermal transfer ink is usually in the range of 20 to 35% by weight, preferably 3 to 35% by weight.
0 to 35% by weight.

The transfer of the thermal transferable ink layer to the surface of the barcode substrate is performed by superposing a heat-sensitive transfer sheet comprising the above-described support and the thermal transferable ink layer on the surface of the barcode substrate.
A known arbitrary method such as a method in which a thermal head is pressed against the back surface of the thermal transfer sheet to transfer the thermal transferable ink layer to the substrate surface in a desired pattern or a method using laser light as a heat source can be used. it can. In addition, the base material on which the barcode is printed as described above may be used as a bonding tape by applying an adhesive on the back surface (an adhesive layer may be formed on the surface of the base material in advance). Alternatively, the above-mentioned base material may be used by attaching it to the surface of a separately prepared bonding tape.

In the formation of the reference region for the light reflecting space on the joining tape, the surface of the joining tape substrate is usually used as it is, similarly to the light reflecting space of the barcode. For example, as shown in FIG. 1, the reference area can be easily secured by printing the barcode on the surface of the bonding tape at a position offset to one side of the roll film.

The formation of the reference region for the light absorbing bar on the joining tape is performed by, for example, as shown in FIG. 4, a position where the bar code is shifted to one side of the roll film on the surface of the joining tape. The reference region for the light absorbing bar can be provided by forming a belt-shaped printing region in parallel with the bar code using the same material as the light absorbing bar in a part of the reference region formed by printing the light absorbing bar.
It is advantageous to form the reference region for the light absorbing bar at the same time as forming the barcode on the bonding sheet. That is, by simultaneously transferring the barcode and the belt-shaped portion of the light-absorbing bar onto the bonding sheet using the thermal transfer ink, both can be formed simultaneously.

[0023]

【Example】

[Example 1] (1) Base material for bonding tape The following five types of sheets were prepared as base materials for a bonding tape. A: 20% softwood pulp digested by the Kraft method
Pulp mixed with 80% hardwood pulp, paper strength enhancer (cationized acrylamide), sizing agent (rosin derivative), and fixing agent (aluminum sulfate) to make long net paper to produce high quality paper (thickness: about 90 μm) ) To obtain the substrate A
And B: A light reflection layer (layer thickness: a mixture of kaolin, calcium carbonate, and titanium oxide dispersed in polyvinyl alcohol and an acrylic emulsion) on the surface of the substrate A.
(Approximately 12 μm) to form a base material B. C: Commercially available cast coated paper (glossy paper, thickness: about 100
μm) was obtained and used as a substrate C. D: Polypropylene synthetic paper (trade name: YUPO SGS7)
5, manufactured by Oji Yuka Co., Ltd.) and used as a substrate D. E: A base material E was obtained by extruding a molten polyethylene resin on the surface of the base material A and laminating it in a film shape (film thickness: about 12 μm).

(2) Hot-melt ink ribbons The following three types of ink ribbons were manufactured as thermoplastic ink ribbons for transferring and printing light absorbing bars for barcodes on the surface of the joining tape. a: A solution of calcium laurate (mixture of mono and diester) was applied to one surface of a polyester film (thickness: 3 μm) and dried to form a stick prevention layer. Then, a mixture of 3 parts by weight of titanium dioxide (white carbon), 7 parts by weight of urea resin fine powder, 40 parts by weight of ethylene-vinyl acetate copolymer, and 50 parts by weight of toluene is applied to the other surface of the polyester film. Then, by drying, a matted undercoat layer having a layer thickness of 2 μm was formed. Then, 30 parts by weight of carnauba wax was added to the surface of this matted undercoat layer,
An ink mixture comprising 35 parts by weight of ester wax, 25 parts by weight of carbon black, and 10 parts by weight of oil is applied and dried to form a heat-meltable ink layer (layer thickness: about 2 μm) to form an ink ribbon a. Obtained.

B: As a material for forming a matted undercoat layer, 10 parts by weight of titanium dioxide, 35 parts by weight of an ethylene-vinyl acetate copolymer, 5 parts by weight of microcrystalline wax,
Except that a mixture consisting of 50 parts by weight of toluene was used, a matte layer having a thickness of 2 μm was formed on the surface of the polyester film provided with the stick prevention layer on the back side in the same manner as in the above-described method of manufacturing the ink ribbon a. Forming a coating layer,
Next, a heat-meltable ink layer was formed on the surface of the matted undercoat layer in the same manner as above to obtain an ink ribbon b. c: An ink ribbon c was obtained in the same manner as in the method for producing the ink ribbons a and b except that the matted undercoat layer was not provided.

(3) Bar code bonding tape An isoprene-based pressure-sensitive adhesive is applied to the back surface of the bonding tape base material to form a pressure-sensitive adhesive layer having a thickness of 30 μm. The heat-meltable ink layer of the ink ribbon was overlapped, and the heat-meltable ink layer was transferred in a barcode shape to a position offset to one side of the substrate surface (see FIG. 1) using a thermal transfer printer.

(4) Measurement of Light Reflectivity and Gloss of Surface of Joining Tape with Bar Code The light reflectance (light reflecting space reflectance) of the substrate surface in the bar code area of the joining tape obtained as described above. The reflectance (light absorption bar reflectance) of each of the transfer ink portions and the glossiness of each portion were measured using monochromatic light having a wavelength of 900 ± 50 nm. The measuring instruments are as follows. Light reflectance: using a spectrophotometer 330 (manufactured by Hitachi, Ltd.), φ60 integrating sphere (measurement area (φ): 20 m)
m) Gloss: Multi-angle gloss meter TC-108DPA
(Tokyo Denshoku Co., Ltd.) used (irradiation angle: 60 degrees)

(5) Observation evaluation of bar code reading error The joining tape on which the bar code is printed is 24 mm × 58 m
m, and this bonding tape was attached to a bonding portion between a photographic film of a 220 type brownie film and a back light-shielding paper. Then, the brownie film was wound around a spool, and left as it was under a storage condition of 60 ° C. for 2 months. Then, the wrapping state of the photographic film was released, and the bar code on the bonding tape was read immediately using a pair of reading optical sensors shown in FIG. 3 to read the bar code and the reference area for the light reflecting space. The error correction operation by comparing both read signals was repeated (100 times), and the frequency of occurrence of a read error (unreadable) was examined. The results of the above reading test are shown in Table 1 with the following symbols. AA: No reading error occurred. BB: Read failure occurred once or twice.

If reading is impossible, manual input of information to the camera (including setting of photographing conditions and the like) is possible, so if the frequency is not high, no serious trouble will occur in practical use. However, it is natural that it is advantageous for an operator who is not very proficient in camera operation to avoid occurrence of unreadable. (6) Measurement results of light reflectance and glossiness and read test results Table 1 shows each measurement result and test results.

[0030]

[Table 1] Table 1 ──────────────────────────────────── Base Ink Reflection Rate ( %) Luminous degree (%) Reading result Space bar Space bar ──────────────────────────────────── Aa 65.5 4.3 3.1 8.2 AA b 65.5 4.2 3.1 14.0 Aac 65.5 4.1 3.1 34.0 BB ───────────────────────────── Ba 80.3 5.3 15.1 8.0 AAb 80.3 5. 1 15.1 18.1 AAC 80.3 6.2 15.1 36.5 BB} ──────── Ca 74.5 5.1 77.3 9.2 BBb 74. 5.2 77.3 18.5 BB c 74.5 5.3 77.3 43.0 BB} Ｄ Da 79.6 5.4 7.1 7.6 AAb 79.6 5.7 7.1 17.5 AAc 79.6 5.9 7.1 44 .2 BB @Ea 58.5 4.6 33.4 9.0 AAb 58.5 4.1 33.4 18.4 BB c 58.5 3.4 33.4 39.9 BB} ──────────────────

From the results in Table 1 above, it can be seen that, on the bonding tape, the light reflecting space region and the light absorbing bar region each have a low glossiness and the total glossiness of the bars is equal to or less than a certain value. A reference area having a surface state equivalent to the light reflection space is formed at a position along the barcode where a code is formed, and the reference area is read in parallel with the reading of the barcode. By using the data to correct the former bar code read data, even if the bonding tape has a curl (generation of curl or step) after winding and storing the roll film for photo on the spool, It can be seen that the occurrence of errors such as the inability to read barcodes is almost completely avoided.

[Embodiment 2] In Embodiment 1, a reference region for a light absorbing bar is transferred to a part of a reference region for a light reflection space by using a hot-melt ink ribbon at the same time when a bar code is formed. Was manufactured as shown in FIG. Similarly, using the above-described bonding tape and a set of three optical sensors shown in FIG. 5, the respective light reflection patterns are formed by the bar code, the light reflection space reference region, and the light absorption bar reference region. The reading and the light reflection pattern of the barcode were corrected.
As a result, no reading error occurred in the barcode reading operation of the brownie film to which the bonding tape manufactured using the base material and the hot-melt ink ribbon described in Example 1 was adhered.

[0033]

The photographic roll film of the present invention has a construction in which a long photographic film and light-shielding paper are joined with a joining tape having a barcode on the surface, and the barcode on the joining tape is a specific type. It has an optical characteristic and a reference area for error correction at the position parallel to the barcode area and an error correction reference area with the same optical properties as the space part of the barcode (and, if necessary, the bar part). By performing the necessary error correction operation using the provided optical reading device, it becomes possible to automatically input the relevant information of the photographic film to the camera without worrying about malfunction. Accordingly, photographing using a relatively large roll film composed of a long photographic film such as a brownie film and light-shielding paper can be performed without complicated photographic film information input.

[Brief description of the drawings]

FIG. 1 is a plan view showing a typical configuration of a photographic roll film in which a long photographic film and a light-shielding paper are bonded by a bonding film with a bar coat of the present invention.

FIG. 2 is a side view of the photographic roll film of FIG.

FIG. 3 is a schematic diagram showing a barcode reading operation and a reference region reading operation of the photographic roll film of FIG. 1;

FIG. 4 is a schematic view showing another embodiment of the joining tape having a barcode and a reference area attached to the photographic roll film of the present invention.

FIG. 5 is a schematic diagram showing a bar code reading operation and a reading operation of two reference areas of a photographic roll film in which the joining tape of FIG. 4 is attached so as to join an end portion of a photographic film and a light-shielding paper surface. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Elongated photographic film 12 Shielding paper 13 Bonding tape 14 Barcode 15 Reference area for light reflection space 16 Optical sensor 17 Optical sensor 18 Reference area for optical absorption bar 19 Optical sensor

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-56648 (JP, A) JP-A-5-224365 (JP, A) JP-A-8-179475 (JP, A) JP-A-8-179 254794 (JP, A) JP-A-8-96060 (JP, A)

Claims (1)

(57) [Claims] 1. A photographic roll film in which at least one end of a long photographic film is bonded to a back light-shielding paper or a leader light-shielding paper by a bonding tape, wherein the surface of the bonding tape is A bar code on which film-related information including at least photographic sensitivity relating to the long photographic film is recorded, and a light reflection space capable of reflecting and absorbing irradiation light having a wavelength other than the sensitivity wavelength region of the photographic film, respectively. A bar code which is constituted by a light absorbing bar and which can be automatically read by an optical reading device provided inside a camera for loading the photographic roll film is formed, and the bar code for the irradiation light is formed. The reflectance of the light reflecting space of the cord is 50% or more and the glossiness is 35% or less, and the reflectance of the light absorbing bar is 30% or less and the glossiness is 30% or less. Is not more than 20%, and the sum of the glossiness of the light reflecting space and the glossiness of the light absorbing bar is 50%.
%, And a reference area for reading error correction having a surface state equivalent to a light reflection space is provided at a position parallel to the bar code on the surface of the joining tape. .