GB/T 7706-2008 PDF English
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The relief prints for decorating
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| GB/T 7706-1987 | English | 319 |
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GB/T 7706-2008: The relief prints for decorating---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT7706-2008
GB
NATIONAL STANDARD
ICS 37.100.01
A 17
Replacing GB/T 7706-1987
The relief prints for decorating
Issued on. JULY 2, 2008
Implemented on. DECEMBER 01, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Product classification... 6
5 Technical requirements... 6
6 Test methods... 9
7 Inspection rules... 16
8 Marking, packaging, transportation, and storage... 16
Appendix A (Normative) Tape for ink layer fastness test... 18
References... 20
Foreword
This standard replaces GB/T 7706-1987 “The relief prints for decorating”.
As compared with GB/T 7706-1987, the main changes of this standard are as
follows.
- MODIFY the standard structure in accordance with GB/T 1.1-2000;
- MODIFY appropriately the "appearance", "finished product specification
size deviation", "overprint error" and "field printing requirements" in the
standard;
- ADD the "ink layer fastness" requirements in 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 shall be under the jurisdiction of the National Printing
Standardization Technical Committee.
The drafting organizations of this standard. Shanghai Packaging Paper (Group)
Co., Ltd., National Light Industry Packaging and Decorating Printing Products
Quality Supervision and Testing Shanghai Branch, National Light Industry
Packaging Standardization Center, Shanghai Zhengwei Printing Co., Ltd.,
Shanghai Jizhen Printing Factory Co., Ltd., China Packaging Technical
Association Packaging and Printing Committee.
The main drafters of this standard. Zheng Shaonan, Chen Qixiang, Cai Heping,
Wei Jiahong, Gao Huijing, Wang Guoxiong.
This standard was firstly issued in 1987.
The relief prints for decorating
1 Scope
This standard specifies the classification, requirements, inspection methods,
inspection rules, marking, packaging, transportation, storage, and so on, of the
relief prints for decorating.
This standard applies to the paper and plastic film decoration printed products
as produced through relief prints (except for flexo printing) technology.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 2792-1998 Test method for peel strength of pressure-sensitive tape at
180° angle (eqv JISZ 0237.1991)
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1.
Sampling scheme indexed by acceptance quality limit (AQL) for lot-by-lot
inspection (GB/T 2828.1-2003, ISO 2859-1.1999, IDT)
GB/T 17934.1-1999 Graphic technology - Process control for manufacture
of half-tone color separations, proof production prints - Part 1.Parameters
and measurement methods (eqv ISO 12647-1.1996)
GB/T 18722 Graphic technology - Application of reflection densitometry and
colorimetry to process control in graphic arts (GB/T 18722-2002, eqv
ISO13656.2000)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Relief printing
It refers to the method using the printing plate in which the graphic part is
higher than the non-graphic part. It is divided into direct relief printing and
indirect relief printing.
[GB/T 9851.1-2008, 5.7]
3.2
Hot foil-stamping
It refers to the process of using the hot die to transfer the hot stamping
materials to the stamped product on such items as paper, cardboard, paper
products, coating and so on.
[GB/T 9851.7-2008, 4.6]
3.3
Film laminating
It refers to the process of laminating a plastic film on the surface of a printed
product.
[GB/T 9851.7-2008, 4.5]
3.4
Coating
It refers to the process of coating transparent and bright materials over a
printed product.
[GB/T 9851.7-2008, 4.4]
4 Product classification
4.1 Fine products
It refers to the high-grade printed decorating which uses high quality printing
main and auxiliary materials through fine plate-making technology AND
reaches to each quality indicator of the fine product.
4.2 Ordinary products
5 Technical requirements
5.1 Dimension deviation of finished product specification
5.2 Overprint error shall comply with the provisions of Table 4.
Table 4 Overprint error in millimeters
Overprint section Allowable deviation of overprint Fine product Ordinary product
5.3 Field printing requirements shall be in accordance with Table 5.
5.4 Printing surface appearance
5.4.1 Fine product
5.4.1.1 The finished product shall be clean and free of scratches, stains and
defects.
5.4.1.2 Text printing shall be clear and complete, and free from incompleteness
or distortion, AND the letter less than 5.5P (No. 7) shall not affect the word
reading.
5.4.2 Ordinary products
5.4.2.1 The finished product shall be clean AND free from obvious scratches,
stains, or incompleteness.
5.4.2.2 The text printing shall be clear and complete AND free from obvious
incompleteness or deformation; AND the letter less than 5.5 P (Number 7)
shall not affect word reading.
5.4.2.4 The printing prime section shall be free from streaks or ghosting.
5.4.2.5 The prime section of each finished product shall not have stain spot of
diameter > 0.4 mm OR more than 3 stains of diameter ≤ 0.4mm.
5.4.2.6 The printing color shall basically comply with the requirements for the
printed sample.
5.4.2.7 Each film laminating finished product shall not have bubble of
diameter > 0.4 mm OR more than 3 bubble of diameter ≤ 0.4mm.
6 Test methods
6.1 Test conditions
6.1.1 Lab temperature and humidity. temperature is 23 °C ± 5 °C AND the
relative humidity is.
6.2 Appearance
PLACE the test specimen under the observation light source as specified in
6.1.3; USE visual inspection for assessment. As for the stain spot and bubble,
USE the qualified 20-fold scale microscope of accuracy 0.01 mm for
measurement.
6.3 Dimension deviation of finished product
6.3.1 Dimension deviation of cutting finished product and die cutting
finished product
6.3.2 Position deviation of finished product pattern with symmetrical
requirements
6.4 Overprint error
PLACE the test specimen under the observation light source as specified in
6.1.3.USE the 20-fold scale microscope of accuracy 0.01 mm to respectively
measure the overprint errors (3 points respectively) between any two colors at
the prime section and subprime section of the test specimen; respectively
TAKE the maximum values and USE them as the overprint errors of the prime
section and subprime section of the test specimen.
6.5 Same color density deviation
6.5.1 Instruments
USE the reflection densitometer in accordance with ISO 14981.
6.5.2 Instrument calibration and use method
FOLLOW the provisions of GB/T 18722.
6.5.3 Test procedures
6.5.4 Test results
6.5.4.1 The same color density deviation of each sample is calculated in
accordance with the equation (2).
6.6.2 Instrument calibration and use methods
FOLLOW the provisions of GB/T 18722.
6.6.3 Test procedures
From the test specimen, randomly SELECT one piece as the reference test
specimen; USE the spectrophotometer to measure the CIEL*a*b* value firstly;
then respectively MEASURE the color difference between the rest test
specimen and the reference test specimen at the same location of same color.
6.6.4 Test results
COMPARE the same batch same color difference of each color of the test
specimen, and USE the maximum value as the same batch same color
difference of this test specimen.
6.7 Ink layer gloss
6.7.1 Instruments
USE the gloss meter in accordance with ISO 15994.
6.7.2 Instrument calibration and use methods
FOLLOW the provisions of ISO 15994.
6.7.3 Test procedures
6.7.4 Test results
CALCULATE the average value of the same color gloss at each point of the
test specimen, which is used as the ink layer gloss of this color of this test
specimen.
6.8 Ink layer abrasion resistance
6.8.1 Instruments
6.8.1.1 Friction tester
The friction bench uses the rigid plastic of surface roughness not less than
1.60 μm, with a device to fix the test specimen; the friction body uses two
pieces of rubbers of thickness 8 mm, hardness 50 Hs ~ 53 Hs, and size 25 mm
x 50 mm, with the internal spacing between the two rubbers in 45 mm; the
friction test times shall reach to 43 times/min ± 2 times/min AND the travel is
about 60 mm. As for the friction tester, SEE Figure 1.
Figure 1 Friction tester
6.8.1.2 Reflection densitometer
Reflection densitometer is same as those specified in 6.5.1 and 6.5.2.
6.8.2 Test conditions
6.8.2.1 Abrasive paper is 80g/m2 clean offset paper with the width of 50 mm.
6.8.2.2 The load is 20 N ± 0.2 N.
6.8.2.3 The number of friction is 43 times/min ± 2 times/min AND the travel is
about 60 mm.
6.8.3 Test procedures
7 Inspection rules
7.1 A group of products of same type, same specification, and same
production period under the basically same production conditions for a batch.
7.2 In accordance with GB/T 2828.1 Inspection sampling plan, TAKE sample in
the unit of piece.
8 Marking, packaging, transportation, and storage
8.1 Marking
Each package shall be affixed with the inspection qualification label on the
head, AND marked with the user unit, product name, type and specification,
quantity, manufacturer name, production date, and inspector code, etc.
8.3 Transportation
During transportation, it is not allowed to throw, smash, or tread on the product,
AND it shall avoid moisture, sun exposure, rain, heat baking, heavy load, or
corrosive gas or liquid.
8.4 Storage
The storage environment shall be ventilated and moisture proof, dust proof
and sun proof, mildew proof, corrosive gas and liquid proof, and avoid heavy
load. AND the storage period is generally not more than 6 months from the
date of production.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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