GB/T 7706-2008The relief prints for decorating (English PDF)

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]

4.1 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

5.1 Dimension deviation of finished product specification

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.

6.1 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.

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

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. […]