GB/T 7706-2008 PDF in English
GB/T 7706-2008 (GB/T7706-2008, GBT 7706-2008, GBT7706-2008)
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GB/T 7706-2008: PDF in English (GBT 7706-2008) GB/T 7706-2008
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 37.100.01
A 17
Replacing GB/T 7706-1987
The relief prints for decorating
凸版装潢印刷品
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)
CY/T 3 Color assessment lighting and observation condition
ISO 13655 Spectral measurement and colorimetric computation for graphic
arts images
ISO 14981 Optical, geometrical and metrological requirements for reflection
densitometers for graphic arts use
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.
Note. P- Point, 1P is equal to about 0.35 mm.
5.4.1.3 The lattice point shall be clear and uniform AND free from defects.
5.4.1.4 The printing prime section shall be free from streaks or ghosting.
5.4.1.5 The printing prime section shall be free from the stains which can be
visible by naked eyes.
5.4.1.6 The printing colors shall comply with the requirements of the printed
samples.
5.4.1.7 The film laminating shall be free from wrinkles, bubbles, etc., AND the
edge of the film laminating shall not be tilting.
5.4.1.8 The alumite foil shall be flat, solid, AND free from discoloring, plate
pasting, hot foil pinhole, incompleteness, burr, or scratches.
5.4.1.9 The coating shall be flat and solid, AND free from disclosing or stain
spots.
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.
Note. P-Point, 1 P is equal to about 0.35 mm.
5.4.2.3 The lattice point shall be clear and uniform AND free from defects.
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.
MEASURE the blank width (accurate to 0.1 mm) at any symmetrical section of
the left and right (or upper and lower) part of the sample; then USE the
equation (1) to calculate the position deviation of the finished product pattern.
Where.
δ - Position deviation of the finished product pattern, mm;
d1, d2 - Blank width (accurate to 0.1 mm) at any symmetrical section of the
left and right (or upper and lower) part of the sample, mm;
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
6.5.3.1 During the test, the printed product shall be placed flat on the substrate
as specified in GB/T 17934.1-1999, Appendix B “Substrate materials used for
reflective density measurement”.
6.5.3.2 As for the instrument calibration and use method, FOLLOW the
requirements of 6.5.2.
6.5.3.3 As for the finished product of trimmed size of 135 mm x 195 mm and
below, USE the reflection densitometer to measure 1 point respectively at the
four corners and middle of the same test specimen of same color; as for the
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
6.7.3.1 SELECT smooth test specimen without wrinkle.
6.7.3.2 USE the gloss meter to respectively measure the surface of different
color layer of the test specimen; MEASURE 3 points on the color layer area of
≤ 100 cm2, and MEASURE 5 points on the color layer area of > 100 cm2.
6.7.3.3 When the measurement result difference of each color gloss of each
test specimen is > 5 gloss units, it shall add one times of measurement points.
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.
A - Ink layer fastness;
A1 - Number of cells occupied by the ink layer;
A2 - Number of cells occupied by the exposed ink layer.
7 Inspection rules
7.1 A group of products of same type, same specification, and same
production period under the basically same production condition...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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