This standard was first issued in 1987. This standard replaces GB/T 7706-1987 "Letterpress Decorative Printing". This standard specifies the classification, requirements, inspection methods, inspection rules, marking, packaging, transportation, storage, etc. of letterpress decorative printing. This standard applies to paper and plastic film decorative printing produced by letterpress printing (except flexographic printing). Compared with GB/T 7706-1987, this standard has the following major modifications: --- The structure of the standard has been modified in accordance with GB/T 1.1-2000; --- The "appearance", "finished product specification size deviation", "overprint error" and "solid printing requirements" in the standard have been appropriately modified; --- The standard has added the requirement of "ink layer bonding fastness". GB/T 7706-2008 Letterpress Decorative Printing GB/T7706-2008 Standard download decompression password: www.bzxz.net
This standard was first issued in 1987. This standard replaces GB/T 7706-1987 "Letterpress Decorative Printing". This standard specifies the classification, requirements, inspection methods, inspection rules, marking, packaging, transportation, storage, etc. of letterpress decorative printing. This standard applies to paper and plastic film decorative printing produced by letterpress printing (except flexographic printing). Compared with GB/T 7706-1987, this standard is mainly modified as follows: ——The structure of the standard is modified in accordance with GB/T 1.1-2000; ——"Appearance", "Deviation of Finished Product Specifications", "Overprint Error" and "Requirements for Solid Printing" in the standard are appropriately modified; ——"Ink Layer Bonding Fastness" requirements are added to the standard.

The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version is applicable to this standard.
GB/T2792-1998 Determination of 180° peel strength of pressure-sensitive adhesive tapes (eｑvJISZ0237:1991)
GB/T2828.1 Sampling procedures for inspection by attributes Part 1: Sampling plan for batch inspection indexed by acceptance quality limit (AQL)
(GB/T2828.1-2003, ISO2859-1:1999, IDT)
GB/T17934.1-1999 Graphic technology Process control for halftone separations, samples and printed products Part 1: Parameters and test methods (eｑvISO12647-1:1996)
GB/T18722 Printing technology—Application of reflection density measurement and colorimetry in printing process control (GB/T 18722-2002, eqv ISO 13656:2000)
CY/T3—Illumination and observation conditions for color evaluation
ISO 13655—Spectral measurement and color test calculation of printed images
ISO 14981—Optical geometry and metrological conditions for reflection densitometers for printing
ISO 15994—Printing technology—Testing of printed matter for visual gloss
Foreword……………………………………………………………………………………………… Ⅰ
1 Scope……………………………………………………………………………………………… １
2 Normative references………………………………………………………………………… １
３ Terms and definitions………………………………………………………………………… １
４ Product categories……………………………………………………………………………… ２
５ Technical requirements………………………………………………………………………… ２
６ Inspection methods………………………………………………………………………… ４
７ Inspection rules………………………………………………………………………… ７
８ Marking, packaging, transportation and storage……………………… ７
Appendix A (Normative Appendix) Adhesive tape for ink layer fastness test…………………… ９
References…………………………………………………………………………………………………………10

ICS 37. 100. 01
National Standard of the People's Republic of China
GB/T 7706--2008
Replaces G13/T7706-1987
The letterpress prints for decorating2008-07-02Published
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
Implemented on 2008-12-01
GB/T 7706-2008
Normative reference documents
Terms and definitions
Product classification
Technical requirements
Test methods
Test rules
Marking, packaging, legal information, storage
Appendix^ (Normative appendix) Adhesive tape for ink fastness test References
This standard replaces GB/T7706-1987 "Letterpress decorative printed products" This standard is mainly modified as follows compared with GB/T7706-1987: The structure of the standard has been modified in accordance with GB/T1.12000: GB/T7706-2008
"Appearance", "finished product specification and size deviation", "overprint error" and "field printing requirements" in the standard etc. have been appropriately modified; the requirement of "ink layer bonding fastness" has been added to the standard. Appendix A of this standard is a normative appendix. This standard was proposed by the General Administration of Press and Publication.
This standard is under the jurisdiction of the National Printing Standardization Technical Committee: the drafting units of this standard, Shanghai Packaging and Paper (Group) Co., Ltd., Shanghai Station of National Light Industry Packaging and Decoration Printing Products Quality Supervision and Inspection, National Light Industry Packaging Standardization Center, Shanghai Zhengwei Printing Co., Ltd., Shanghai Quzhen Printing Factory Co., Ltd., and China Packaging Technology Association Packaging Printing Committee.
The main drafters of this standard: Zheng Shaoku, Chen Fuxiang, Ji Heping, Wei Jiasan, Gao Xiqing, Wang Yao. This standard was first issued in 1987.
1 Scope
Bai Duan Decoration Printing Products
GB/T 7706—7008
This standard specifies the classification, requirements, inspection methods, inspection rules, marking, packaging, transportation, storage, etc. of relief printing. This standard applies to paper and plastic film decorative printed products produced by relief printing (except flexographic printing) 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all referenced documents with dates, all amendments (excluding the contents of the survey) or revisions accompanying them are not applicable to this standard: however, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard GB/T2752—1998 Determination of 180° peel strength of pressure-sensitive adhesive tape (eqVJIS20237:199-) GB/T2828.1 Sampling inspection procedure for counting Part 1: Sample suppression plan for batch inspection based on acceptance quality limit (AQI.) (GB/T 2828,1—2003,ISO 2859-:1999,1I)T) GB/17934.1199 Printing technology - Process control of color separation, proofs and finished products - Part 1: Parameters and test methods (EVIS012647-1:1996) GB/T18722 Printing technology - Application of reflection density measurement and colorimetry in printing process control (GB/T18722-2002,eqv1s0-3656:2000)
CY/-3 Color evaluation - Illumination and viewing conditions
IS013655 Spectral measurement and reduction of printed images
IS014S81 Optical geometry and metrological conditions for printed monthly reflection densitometers ISO15S91 Printing technology - Test of printed products - Visual gloss 3 Terms and definitions
The following terms and definitions apply to this standard: 3.1
Relief printing printing
The method of printing with the printing plate with the image part higher than the non-image part. It is divided into direct relief printing and indirect relief printing. [G13/T 9851.1 2G08,5.7
Hotfoil-stamping
The process of transferring the hot stamping material to the stamped object through the hot stamping die on paper, cardboard, paper products, coated articles, etc. LGB/T 9851. 7—2008,4. 6
Film luminating
The process of laminating the surface of the printed product with a plastic film coated with an adhesive GB/T 9851. 7.--2008.4. 5.1
Glazing
The process of coating the surface of the printed product with a transparent and bright material. _GB/T 985-.72008,4.4]
GB/T 7706—2008
Primary part
The part reflecting the theme on the surface, such as images, text, logos, etc. GB/T 7705--2008 Planographic printing products,3.83.6
Subprimesction
The part other than the primary part GB/T7705-2008 Planographic decorative printed products 8.94 Product classification
Fine products
High-grade decorative printed products produced with high-quality printing technology, auxiliary materials and fine plate-making technology, and with quality that meets all the indicators of fine products. 4.2 General products
Other decorative printed materials except fine products 5 Technical requirements
5.1 Finished product size deviation
Cutting specifications should comply with the provisions of Table 1. 5.1.1 Cutting product specifications
390×543 and below
390X543 and above
Cutting finished product size deviation
Size limit deviation
Fine products
Die-cut finished product size deviation should comply with the provisions of Table 2. Table 2 Die-cut finished product size deviation
Size, service limit deviation
Die-cut finished product specifications
: 35×195 and below
135×195 and above 1
Fine products
5.1.3 The position deviation of the finished product pattern with symmetry requirements should comply with the provisions of 3. ho.5
Table 3 Position deviation of finished product pattern with symmetry requirements Finished product specifications
1.35×19. and F
135× 95 1
5.2 The overprint error should comply with the provisions of installation 4. 2
Fine products
Allowable deviation of symmetrical pattern
Unit: meter
General products
Unit: exposure×
General products
Unit: depth
General products
Overprinting part
Main part
Secondary part
Solid printing requirements shall comply with the provisions of Table 5,
Indicator name
Density deviation of the same color
Applicable color
Glossiness of hatching layer
Abrasion resistance of carving layer
Layer bonding strength:
Table 4 Overprint error
Fine products
Table 5 Solid printing requirements
CIEL\a'h'
Output acceptable frequency index of invisible depth requirements. AE
G,(Go\)
Allowable error of overprint
GB/T7706—2008
Unit is meter
General product
Indicator value
Fine product
L*>b0. 09
·General product
L ≤50. 00 L >60.00
bInk layer bonding strength refers to the bonding strength between the layers and the film planes. Products without this requirement can cancel this indicator. 5.4 Printing surface appearance
5.4.1 Fine product
5.4.1.1 The finished product is intact, without scratches, stains, or defects. 5. 4. 1. 2 The printed characters should be clear and complete, without defects or deformations, and characters smaller than 5. 5P (No. 7) should not affect the reading. Note: P Puint.1 P is about equal to F0. 35 mn.5. 4. 1. 3
, the dots are clear and even, without any defects,
5. 4. 1.4
there should be no streaks or ghosting in the main parts of the print, 5.4.1.5there should be no visible stains in the main parts of the print. The printing color should meet the requirements of the printing sample
5. 4. 1.6
5. 4. 1. 7
5. 4. 1. 8
The coating should not have wrinkles, air pools, etc., and the edges of the coating layer should not be lifted. The hot foil of electrochemical aluminum should be flat, firm, not discolored, not flat, and should not have foil sand, weak defects, rough edges, and scratches. 5.4. 1. 9 The glazing should be flat, firm, not discolored, and not have stains. 5.4.? General products
5.4.2.1 The finished product should be intact: no obvious scratches, liquid stains, or war defects. 5.4.2.2 The printed text should be clear and complete, without obvious defects or deformations. Words smaller than 5.P (No. 7) should not affect reading. Note; F Point+1 P is approximately equal to 0, 35 nm.5.4.2.3 The dots should be clear and complete. No obvious defects. 5.4.2.4 There should be no streaks or ghosting in the main parts of the printing. -
L'≤60.00
5.4.2.5 There should be no stains with a diameter >0.4m on the main part L of each finished product, and no more than 3 stains with a diameter ≤0.4mm.5.4.2.6 The printing color should basically meet the requirements of the printing sample. 3
GB/T 7706 -2008
5.4.2.7 There should be no bubbles with a diameter of 0.4InII on each laminated finished product, and no more than 3 air pools with a diameter of 0.4mm.5.4.2.8 The electroplated aluminum hot box should be flat and firm, not discolored, not smeared, and there should be no sand holes with a diameter >0.3mm on the right side of each finished product, and no convex diameter of 0.3mm. The number of seconds of the condensation box of mm cannot exceed 2 5.4.2.9 The glazing should be flat, firm, not discolored, and without bright spots. 6 Inspection method
6.1 Inspection conditions
6.1.1 Laboratory overflow and humidity: The temperature is 23℃±5℃, and the relative humidity is 60%+%. 6.1.2 Sample pretreatment: Under the conditions of 6.1.1, the sample should be placed in an environment without ultraviolet light for 8 hours. 6.1.3 Sample viewing light source: It should comply with the provisions of CY/T3. 6.2 Appearance
Place the sample under the sample viewing light source specified in 6.1.3 and identify it by oral measurement. Among them, the points and bubbles are measured with a 20-degree scale microscope with an accuracy of 0.01mm and certified by the meter. 6.3 Dimensional deviation of finished products
6.3.1 Dimensional deviation of cut and die-cut finished products: Measure the length (accurate to 0.1mm) of the cut or die-cut finished product sample with a specified size, and the difference between the length and the specified size is taken as the dimensional deviation of the finished product sample.
6.3.2 Dimensional deviation of the pattern position of the finished product with symmetry requirements: Measure the position difference of the right and left patterns of the sample.
The width of the blank space at any symmetrical part (or above or below) (accurate to 0.1II), and then calculate the finished product pattern position deviation according to the formula (Id-d
6--The width of the blank space at the symmetrical part of the sample (or below) mm. 6.4 Overprint error
Place the sample under the observation group light source specified in G.1.3, and use a 20x scale microscope with an accuracy of 0.01mm to measure the overprint error between any color of the main part and the secondary part of the sample at 3 points, and take the maximum value as the overprint error of the main part and the secondary part of the sample.
6.5 Density deviation of the same color
6.5.1 Instrument
A reflection densitometer that complies with ISO 1198I is used. 6.5.2 Instrument calibration and use method
According to the provisions of GB/T18722,
6.5. 3 Inspection steps
6.5.3.1 During the test, the printed matter shall be placed flat on a substrate that meets the requirements of Appendix 13 of GB/T 17934.11995\Substrate materials for measuring reflection density*.
6.5.3.2 Instrument calibration and use methods shall be in accordance with G.5.2 requirements. 6.5.3.3 The size of the sheet is 135 For finished products with a size of 135 mm × 195 mm or less, use a reflective color densitometer to measure at each of the four corners and the middle of the same sample with the same color; for finished products with a size of 135 mm × 195 mm or less, use a reflective color densitometer to measure at 5 points on the same sample. 6.5.4 Test results
6.5.4.1 The color density deviation of each sample is calculated according to formula (2) where:
Density deviation:
The average value of the n-th color density
The color density measured for the :th time;
The number of times measured.
6.5.4.2 Compare the average values ​​of the color density deviations of each package and take the maximum value as the color density deviation of the sample. 6.6 Color difference of the same color in the same batch
6. 6. 1 Instrument
Use a spectrophotometer (colorimeter) that complies with ISO13655/6.6.2 Instrument calibration and use method
Perform according to the provisions of G13/T18722
6.6.3 Inspection steps
GB/T 7706—2008
Use any sheet in the sample as the reference sheet, and use a spectrophotometer to measure its CIELα value first, then measure the color difference of the same color and the same part of the sample and the base sheet, 6.6.4 Inspection conclusion
Compare the color difference of the same color of the same batch of the sample, and take the maximum value as the color difference of the same color of the same batch of the sample. 6.7 Glossiness of ink layer
Use a gloss meter that complies with ISO
5994
6.7.2 Instrument calibration and use method
According to the provisions of ISO15994
6.7.3 Inspection steps
6.7.3. 1 Take a flat, wrinkle-free sample. 6.7.3.2 Use a gloss meter to measure 3 points on the surface of different color layers of the sample with an area of ​​≤100cm, and 5 points on the color layer with an area of ​​100cm.
6.7.3.3 When the difference in glossiness measurement results of each color of each sample is greater than 5 glossiness units, double the measurement points. 6.7. 4 Test results
Calculate the average glossiness of the same color at each point of the sample as the glossiness of the device layer of the color selected for the test. 6.8 Abrasiveness of ink layer 6.8.1 Apparatus 6.8.1.1 Friction testing machine The friction table is a hard plastic body with a surface roughness of not less than -160 [Lm, and has a device for fixing the sample; the friction body is made of two pieces of rubber with a thickness of 8 mm, a locking degree of s3 Hs-~53 Hs, and a size of 25 mm×50 mm; the inner sides of the two friction bodies are 45 mm apart). The friction test frequency should reach 43 times/min+2 times/min, and the stroke is about 63 m. The friction testing machine is shown in Figure 1.5. GH/T 7706-20C8. Except for the aid of education, 6.8.1.2 Reflection densitometer The reflection densitometer is the same as 6.5.1.6.5.2.
6.8.2 Test conditions
Direction of movement
Figure 1 Friction testing machine
6. 8. 2. 1 The friction paper is 80 g/m clean offset paper with a thickness of 50 mm6. 8. 2. 2 The weight is 20 N 1-0. 2 N.6.8.2.3 The number of friction times is 43 times/min~2 times/min, and the stroke is about 60 mm. 6. 8.3 Test steps
Friction paper
Blast paper
Cut into samples of certain size and place them on the friction table. The area of ​​the sample to be tested should be larger than the area rubbed by the friction body. 6.8.3.1
6.8.3.2 Determine the color density of the layer to be abraded according to 6.5.3, measure 3 points and take the average value. 6.8.3.3 Fix the sample on the friction body and fix the friction paper on the friction body. 6.8.3.4 Run the friction tester back and forth 13 times/mil1-2 times/mitl, stop the machine and remove the sample. 6.8.3.5 Determine the color density of the layer that is most severely abraded according to 6.5.5, measure 3 points and take the average value. 6.8.4 Test resultswwW.bzxz.Net
The wear resistance of the ink layer is calculated according to formula (3).
Where.
The wear resistance of the ink layer;
The average density value after the sample is abraded:
The density value before the sample is abraded.
6.9 Adhesion strength of adhesive layer
6.9.1 Test device
D×100%
6.9.1.1 The selection of the test tape shall comply with the provisions of A.1 in Appendix A. 6.9.1.2 The requirements for adhesive reverse pressure rolling are shown in A.2.1..(3) in Appendix A
6.9.1.3 The mass disc separation test machine is shown in Figure 2. The diameter of disc A is 170 mm and the width is 55 mm; the diameter of disc B is 65 mm and the width is 50 mm. The pressure between discs A and B is 100 N. 6
6.9.2 Test steps
6.9.2.1 Roll the tape back and forth on the ink printed surface of the standard sample on the tape rolling machine for three times to ensure that the required sample parts are completely adhered, and leave the sample after the tape is adhered for 5min to 10min. 6.9.2.2
6.9.2.3
6.9.2.4
Fix the test mold
end on disk A, and the exposed tape on disk B (Figure 2). Rotate the disk at a speed of 0.6m/s~1.0m/s, peel off the tape, and cover the peeled part with a 201m wide semi-transparent millimeter grid paper. Count the number of grids occupied by the ink layer and the number of grids of the peeled ink layer.
6.9.3 Test results
The bonding strength of the cushion layer is calculated according to formula (1):
Bonding strength of the A-layer
grid number of the ink layer
grid number of the peeled ink layer.
7 Inspection rules
7.1 A group of unit products of the same variety, same specification and same production cycle with basically the same production conditions is called a batch. (4)
7.? Sampling is carried out in accordance with the provisions of the inspection sampling plan of GF/T2828.1. The sampling unit is pieces, and the minimum number of samples for each batch is 5 pieces.
7.3 Determination of unqualified products: Each product shall be inspected in accordance with the provisions of this standard. If one or more technical indicators do not meet the requirements, the product shall be unqualified.
7.4 Determination of unqualified batches: Each batch of products shall be inspected in accordance with the provisions of this standard. If one or more products are unqualified, double sampling shall be conducted for re-inspection. If there are still one or more unqualified products, the batch is an unqualified batch. 8 Marking, packaging, transportation, storage
8.1 Marking
A qualified inspection label should be affixed to the head of the product. Indicate the manufacturer, product name, variety and specification, quantity, manufacturer name, production period and inspector code, etc.
GB/T7706-2008
According to the contract requirements or the volume, quality and quantity of the product, use the same packaging paper and strapping tape to pack, plastic bags or cartons. 8.3
Do not throw, smash or step on during transportation. It should be protected from moisture, sun exposure, rain, heat, heavy pressure and corrosive gas and liquid. 8.4
The storage environment requires ventilation, moisture, dust, sun protection, oil, sieve, corrosive gas and liquid, and cannot be heavily pressed. The storage period is generally no more than 6 months from the date of production.
A.1 Basic requirements for adhesive tapes
A.1.1 Strength
A.1.2 Adhesion
Tape substrate
A.1.4 Adhesive
Appendix A
(Normative appendix)
Tape for ink layer fastness test
2.9N/19nn~3.33N/19mm
Synthetic olefinic rubber
Aromatic hydrocarbons
Method for measuring adhesive tape adhesion
A.2.1 Tape rolling machine
A.2.1.1 The tape is a rubber-covered roller with a diameter of 84mm and a thickness of 45mm. A.2.1.2 The rubber thickness (Shore A type) is 60~80 and the original thickness is 6min. A.2.1.3 Yoke load 20 N ± 0.5 N.
A.2.1.4 Rolling speed 0.3 m/min:
Tensile testing machine
Tensile testing machine should be able to record the peeling load automatically and have a drawing output. A.2.3 Test method
4. 2. 3. 1 Test case temperature is 25 ℃ + 2 ℃, relative humidity is 60% + 5%. A.2.3.2 The material to be adhered by the tape should be placed under the conditions of A.2.3. 1 for 2 h. GB/T 7706—2008
A.2.3.3 Peel off the tape, stick it to the adhered material, roll it back and forth three times on the tape roller 1. Let it sit for 5 minutes before testing again. A.2. 3. 4
Adhesion.
The tensile testing machine is continuously peeled at a speed of 0.3 m/min. According to the planimeter method in 7.2 of G[3/T 2792-1998, each roll is measured three times and the average value is the tape agent force.2. Measure each roll three times using the planimeter method and calculate the average value as the tape agent force.2. Measure each roll three times using the planimeter method and calculate the average value as the tape agent force.
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