GB 18739-2002 Xuan paper

This standard specifies the terms and definitions, geographical origin, product classification, requirements, test methods, inspection rules, and marking, labeling, packaging, transportation, and storage of Xuan paper. This standard applies to Xuan paper produced in Jingxian County, Xuancheng City, Anhui Province. GB 18739-2002 Xuan paper GB18739-2002 standard download decompression password: www.bzxz.net

ICS_85.060
National Standard of the People's Republic of China
GB18739--2002
Xuan paper
2002-05-29 Issued
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
2002-09-01 Implementation
GB18739—2002
This standard is a full-text mandatory standard.
This standard is prepared in accordance with the "Regulations on the Protection of Products of Origin" and GB17924-1999 "General Requirements for Products of Origin". Appendix A and Appendix B of this standard are normative appendices, and Appendix C is an informative appendix. This standard is proposed by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. This standard is under the jurisdiction of the Standardization Working Group of Products of Origin. The main drafting organizations of this standard are: China Association for Standardization, Anhui Provincial Bureau of Quality and Technical Supervision, Anhui Jingxian China Xuan Paper Group Co., Ltd. The main drafters of this standard are: Cao Wansheng, Liu Baoping, Xing Chunrong, Gu Jiajun, Wang Hengyi, Qu Shengquan, Cheng Qingyu. 264
1 Scope
GB 18739—2002
This standard specifies the terms and definitions, geographical scope of origin, product classification, requirements, test methods, inspection rules and marking, labeling, packaging, transportation and storage of Xuan paper.
This standard applies to Xuan paper produced in Jingxian County, Xuancheng City, Anhui Province. 2 Normative references
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, the parties to the 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 shall apply to this standard. GB/T450-1989 Paper and paperboard sampling GB/T451.1-1989 Paper and paperboard size and deflection determination method GB/T451.2-1989 Paper and paperboard basis weight determination method GB/T451.3-1989 Paper and paperboard thickness determination method GB/T453-1989 Paper and paperboard tensile strength determination method GB/T455.1-1989 Paper tear resistance determination method GB/T 459-1989 Paper elasticity determination method GB/T 462-1989 Paper and paperboard moisture determination method GB/T 464.1-1989E Paper and paperboard dry heat accelerated aging method (105 ± 2℃, 72h) GB/T 465.2—1989
Determination of the tensile strength of paper and paperboard after immersion in water for a specified timeGB/T1541—1989Determination of the dustiness of paper and paperboardGB/T 2828—1987
Counting sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches)GB/T 7974—1987
Determination of whiteness of paper and paperboard (diffuse/vertical method)GB/T8940.1-1988Determination of whiteness of paper and paperboard45/0 directional reflection methodGB/T 10342—1989
Paper packaging and marking
GB/T 10739—1989
3 Terms and Definitions
Standard atmosphere for handling and testing of pulp, paper and paperboard samplesThe following terms and definitions apply to this standard. 3.1
Xuan paper
Using pteroceltis talavinowi Maxim and rice straw produced in Jingxian County and its surrounding areas, and using the unique mountain spring water of Jingxian County, it is produced in Jingxian County, Anhui Province with traditional craftsmanship and special traditional craft formulas, under strict technical supervision, and is a high-grade art paper with unique properties such as ink wetting and durability, suitable for calligraphy, painting, rubbing, watermarking, etc. 4 Geographical origin range
The geographical origin range of Xuan paper approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China in accordance with the "Provisions on the Protection of Geographical Origin Products" is shown in Appendix A. 265
GB 18739--2002
5 Product classification
5.1 Xuan paper is divided into three categories according to the proportion of raw materials: special pure leather, pure leather, and cotton material. 5.2 The quality grades of Xuan paper are divided into genuine and secondary brands (superior and qualified products). 6 Requirements
6.1 Raw material requirements
6.1.1 Pteris chinensis bark
Pteris chinensis bark grown in the karst hilly areas of Jingxian and surrounding areas, with uniform tissue, uniform fibers, and bast tissue of three-year-old tender branches.
6.1.2 Sandy rice straw
Golden rice straw with long fibers, strong toughness, and not easy to rot grown on the sandy soil of the river valley plains in Jingxian and surrounding areas. 6.1.3 Water
Taken from mountain spring water in Jingxian.
6.2 Process requirements
The process is as follows:
6.2.1 Material selection
a) Processing procedure of Chinese cedarwood bark
Cutting - steaming - soaking - peeling - sun drying - skinning b) Processing procedure of grass burning
Grass selection - grass cutting (grass pounding and grass breaking) - burying and soaking - washing - ash staining - piling and washing - sun drying - steaming and washing - sun drying - grass burning 6.2.2 Pulping
a) Chinese cedarwood bark
Skinning - soaking - steaming - washing - pressing - selection and inspection - bleaching - —Washing——Squeezing——Selection and inspection——Beater——Washing——Bleaching sandalwood fiber material b) Grass material
6.2.3 Ingredients
Phellodendron bark material
6.2.4 Papermaking
Whipgrass——Beater——Washing——Bleaching——Bleaching grass fiber material—Crushing——Mix——Screening——Beater——Washing all materials—Watering——Glueing—Paper scooping—Squeezing——Paper baking—Paper selection—Paper cutting finished product 6.3 Sensory index
The paper is soft and tough, feels smooth, the paper surface should be flat, with faint bamboo curtain patterns, the cutting edges should be neat and clean, and the paper surface should not have folds, cracks, holes, sand particles and attachments that affect the use. The color tone of the same batch of products should be consistent, and the brightness (whiteness) difference should not be greater than 3% (absolute value). 6.4 Common specifications, quality and deviations of Xuan paper
Common specifications, quality and deviations of Xuan paper are shown in Table 1. 266
Four-foot singleWww.bzxZ.net
Heavy four-foot single
Four-foot padded
Four-foot two-layer
Four-foot three-layer
Leather four-foot single
Leather cotton
Five-foot single
Five-foot padded
Five-foot two-layer
Five-foot three-layer
Leather five-foot single
Six-foot single
Six-foot padded
Six-foot two-layer
Six-foot three-layer
Shakuhachi screen
Eight-foot piece
2 Zhang Xuan
6 Zhang (Lu Huang)
2 Zhang (Qianxi)
Table 1 Dimensional deviation and tolerance of each knife quality
Specification/mm
690×1380
700×1380
840X1530
970×1800
530×2340
1242×2484
1449×3675
1932×5037
2460×6530 (raw edge)
Note 1: It is recommended that the paper is flat paper, with 100 sheets as one knife. Note 2: It can also be implemented according to the order contract.
6.5 Physical and chemical indicators
The physical and chemical indicators shall conform to the requirements of Table 2.
Dimension deviation
Weight per cutter/kg
GB18739—2002
Allowable difference per force/g
—100
—100
—150
—200
—100
—150
—150
—250
—350
—3750
GB 18739--2002
Indicator name
Firmness/(g/cm\)
Brightness (whiteness)
Breaking length average/km
Tear index average/mN·m/g
Wet strength average/mN
Method 1 (see Appendix B)
Ink wetting
Water absorption
Flexibility
Method 2 (see Appendix C)
Aging resistance Whiteness (absolute value) Decrease
Average/mm
Difference/mm
Average elongation after moisture
Average shrinkage after drying
(0.5~2.0)mm2 (piece/m2)
(0.3~~1.5)mm2(black)/(piece/m2)
Greater than 1.5mm2(black)
Double pulp group/piece/m2)
Table 2 Physical and chemical indicators
Special clean leather
≥440
27. 0% ~33. 0%
0～5%
Note 1: Method 2 is not used as the basis for type inspection and delivery inspection. Note 2: The following items are qualified products if any of them is found, but no more than two items are found at the same time: a) the breaking length is less than 10% of the prescribed value; b) the tear index is less than 5% of the prescribed value; the brightness (whiteness) is less than 2% (absolute value) of the prescribed value; c) the dust content exceeds the prescribed value by 20%.
Pure leather
0.35±0.04
≥390
Should meet the requirements of standard samples
25. 0%~35. 0%
Not allowed
Not allowed
Cotton materials
≥320
22. 0% ~38. 0%
7.1 The following tests shall be carried out under the conditions specified in GB/T10739, and sample sampling shall be carried out in accordance with GB/T450. 7.2 The raw material composition of Xuan paper shall be determined in accordance with GB/T4688. 268
7.3 The paper size shall be determined in accordance with GB/T451.1. 7.4 The quantitative quantity shall be determined in accordance with GB/T451.2. 7.5 Physical and chemical indicators
7.5.1 Tightness
Measured in accordance with GB/T451.3.
7.5.2 Brightness (whiteness)
GB 18739—2002
Measured in accordance with GB/T7974 or GB/T8940.1. During arbitration, measured in accordance with GB/T7974—1987. 7.5.3 Vertical and horizontal average of tear length
Measured in accordance with GB/T453.
7.5.4 Vertical and horizontal average of tear index
Measured in accordance with GB/T455.1.
7.5.5 Vertical and horizontal average of wet strength
Measured in accordance with GB/T465.2, with the immersion time of 10 minutes. 7.5.6 Ink wetting property
The test shall be carried out in accordance with the provisions of Appendix B or Appendix C. In case of arbitration, the test shall be carried out in accordance with the provisions of Appendix B. 7.5.7 The decrease in whiteness (absolute value) against aging shall be carried out in accordance with the provisions of GB/T464.1-1989. After continuous heating for 72 hours, the whiteness of the sample before and after aging shall be measured and the difference shall be calculated. 7.5.8 Water absorption
Cut 5 longitudinal and transverse samples with a width of 15 mm and a length of 250 mm. One end shall be clamped on the paper clamp of the water absorption tester. The other end of the sample shall be vertically inserted into the water with a temperature of (23 ± 1) ℃ for 5 mm. When the liquid level rises to a height of 20 mm from the sample, the timing shall be started. After 60 seconds, the height of the liquid level rise shall be read from the height of 20 mm. The test result shall be expressed as the arithmetic mean of the measured values, accurate to 1 mm. 7.5.9 Elasticity
The test shall be carried out in accordance with the provisions of GB/T459.
7.5.10 Dust degree
Measured in accordance with GB/T1541.
7.5.11 Double pulp mass
Cut a sample of 1m×1m paper with an area of ​​1m2, and check the two single fiber bundles connected to form a dumbbell-shaped pulp mass against the light, and count the total number to express the measurement result.
7.5.12 Moisture
Measured in accordance with GB/T462.
7.5.13 Appearance
Use visual inspection method.
8 Inspection rules
Inspection is divided into acceptance inspection and type inspection.
8.1 Acceptance inspection
8.1.1 Products of the same type are considered as a batch with the quantity delivered at one time, and the sample unit is na. 8.1.2 Production should ensure that the products produced meet the requirements of this standard. When delivering, a product quality certificate should be attached. The cut edge of the cut paper should be clearly stamped.
8.1.3 During the delivery inspection, the inspection level, sampling inspection plan and acceptable quality level (AQL) of the inspection items shall be carried out in accordance with the provisions of Table 3. 269
GB 18739--2002
Batch/knife
26～150
151~500
501~1200
1 201～10 000
8.1.4 Judgment rules
Table 3 Sampling plan and qualified judgment
Normal secondary inspection sampling plan
Class B nonconforming products
Sample size
13(26)
20(40)
Inspection level S-4
Class C nonconforming products
AQL= 10
Classification of unqualified products
Class B unqualified products
Ink wetting
Flexibility
Water absorption
Wet strength
Aging resistance
Class C unqualified products
Brightness (whiteness)
Breaking length
Tear index
Double pulp group
Delivery moisture
Appearance defects
If both Class B and Class C unqualified products appear, under the premise of meeting the A. and R. judgment requirements for Class B unqualified products, and only when the sum of Class B and Class C unqualified products is less than or equal to the A. value of Class C unqualified products, it is judged as a batch qualified; if it is greater than the R. value of Class C unqualified products, it is judged as a batch unqualified; if it is less than R. and greater than A. , then the second sample shall be measured and judged, and the judgment method is the same as before. 8.2 Type inspection
8.2.1 Type inspection shall be carried out in any of the following situations, and the inspection items shall be all the technical indicators of this standard. a) When the product is discontinued and production is resumed;
Normal production, once every six months;
When the factory inspection results are significantly different from the last type inspection; When the national quality supervision agency proposes a type inspection requirement. Type inspection adopts sampling inspection, and samples are randomly selected from the products within a cycle. 8.2.2
The samples shall be inspected according to all the technical indicators specified in this standard, and shall be judged as qualified if they meet the requirements. If the type inspection fails, a re-inspection may be carried out. If the re-inspection is qualified, it shall be judged as qualified, and if the re-inspection is unqualified, it shall be judged as unqualified. 8.2.4
9 Marking, labeling, packaging, transportation, storage 9.1 Marking, labeling, packaging
Should comply with the provisions of GB/T10342, and mark the origin product logo, product name, raw materials (or raw materials and ingredients), specifications and dimensions, manufacturer's name and address, production date, implementation product standard number or in accordance with the provisions of the order contract; there should also be warning signs such as "afraid of moisture". 9.2 Transportation
When transporting, a canopy and clean means of transportation should be used. During transportation, the product should not be exposed to the sun, rain, moisture, or violent collision. 9.3 Storage
The product should be stored in a cool, dry, ventilated warehouse; it is strictly prohibited to stack it in the open air, expose it to the sun, rain or near heat sources. 270
County Administrative Division『
JING XIAN XING ZHENG QUHUA TUT:200000
Oral grass hair production
Weekly shooting age
@Xinfeng
-Company
Production sedan chair worker
Shuinanzhong
43 incense burner tender stone
Longmen also
Si Pu Mian
Village Sanhe
Wangjingshan
Appendix A
(Regulations Appendix)
Xuan paper origin area map
The most beautiful health
Lanli Town
(em filter
In the square
Jian Shoutang
Dry Guantou
Big Country Black Dream
It is a de-shelled
People's food
Gao Shilu
Item this government skin eye
@ Township (Shop) People's Government
9, Electric
Enterprise and Institution List
GB 18739—2002
Healthy Garden
Shangyi Company
Appendix B
(Normative Appendix)
Test Method for Ink Wetting Property of Xuan Paper I
GB 18739—2002
B.1 Use standard ink such as Chinese ink to prepare 100% and 2% concentration ink, and put them into 50mL dropper bottles respectively. B.2 Cut four 250mm×250mm samples. B.3 Experimental steps
B.3.1Take a piece of sample paper, place it flat on a table covered with a blanket, and drop a drop of 100% and 2% ink on different positions. When there is no ink on the paper, drop a drop of 2% ink on the edge of the 100% ink drop; use a brush dipped in 100% ink to draw a "cross" on the 2% ink drop. B.3.2 Use a brush dipped in 2% ink to randomly draw the word "#" on the sample. B.3.3 Repeat steps A.3.1 and A.3.2 on the same sample. B.3.4 Test the four samples cut according to steps A.3.1, A.3.2 and A3.3 respectively. B.4 Test results
B.4.1 Compare the dried samples with the standard. B.4.2 Check the reaction of rice paper to ink color. Thick ink is dark and bright, and light ink is light but not gray. B4.3 Check the change of rice paper to ink color. Rice paper must be It must have the proper ability to absorb ink particles and diffuse ink, and can both conduct ink with water and resist ink with water, so as to achieve the effect of ever-changing ink rhyme and express the style of ink dripping. When accumulating ink, each stroke is clearly distinguished, and the thick and thin strokes do not convect, which can show the subtle effect of thick and thin, thick and thin, and both wet and dry. B.4.4 Check the reflection of the layers of the rice paper, and require the layers of heavy strokes to be clear. B.4.5 Compare with the standard sample. If it meets the standard sample, the test result is judged as "qualified" and if it does not meet the standard sample, the test result is judged as unqualified. 271
GB 18739--2002
C.1 Instruments and reagents
Appendix C
(Informative Appendix)
Test method 2 for ink wetting of rice paper
Microscopic scanning densitometer, should meet the following conditions: C.1. 1
Data resolution 0.01D;
Sensitivity 0-4D optical density level;
Measurement hole area 50um×50um;
Scanning point spacing 50um;
Scanning distance 40mm or more.
C.1.2Burette
Acid burette with a capacity of 25mL.
C.1.3Standard ink
For example, use Chinese ink.
C.1.4 Blankets, press plates and other tools.
C.2 Sample preparation
C.2.1 Cut four 250mm×250mm samples and lay them flat on a table covered with a blanket. C.2.2 Fill a 25mL burette with standard ink, fix the burette on the test tube rack, and adjust the height of the burette so that the bottom end of its lower opening is 50 meters away from the sample surface. mm. Drop a drop of ink on the sample and wait for it to dry naturally. C.3 Determination steps
C.3.1 Place the sample in C.2.2 on the stage of the microscopic scanning densitometer. The scanning direction of the instrument should be consistent with the longitudinal (lateral) direction of the sample, and try to make the scanning track pass through the center of the ink. Adjust the linear scanning range of the instrument to be sufficient to pass through the longitudinal (lateral) direction of the sample ink. C.3.2 Adjust the optical density of the blank area of ​​the paper to zero. C.3.3 Start the instrument and start the measurement. First, make the scanning track pass through the longitudinal (or transverse) direction of the ink, then rotate the sample 90°, and adjust the instrument according to C.3.1 so that the scanning track passes through the transverse (or longitudinal) direction of the ink. C.3.4 Record two groups of (longitudinal and transverse) measurement values ​​respectively. C. 4 Calculation and expression of measurement results
C.4.1 The reflection of the ink color is expressed as the mean value, represented by the symbol A (action). From the first value greater than 0.01 in a set of measured values ​​to the last value greater than 0.01, remove all 0.00, and substitute the remaining values ​​as valid values ​​into formula (C.1) to obtain the A value. A=X- X+X+ +X--+X.
.(C.1)
Where:
XX..X.Valid measured value
n-——the number of valid measured values.
C.4.2 The change of ink color is expressed as the coefficient of variation, represented by the symbol D (difference). Remove all values ​​less than 1.00 in a set of measured values, and substitute the remaining valid values ​​into formula (C.2) to obtain the D value. 272
X 100%
× 100%
GB187392002
.....(C. 2)
3 The diffusion and shaping condition when the liquid is dropped is expressed as the difference between the two groups of variation coefficients in the longitudinal and transverse directions, represented by the symbol S(shape). Calculate according to formula C.4.3
(C.3) to obtain the S value.
S(%) =Dlongitudinal(%) -— D(%)
Where:
Diffusion and shaping condition, %,
Longitudinal variation coefficient;
Transverse variation coefficient.
C.4.4 Take the arithmetic mean of the four samples as the measurement result, A retains one decimal place, D retains one decimal place, and S retains to an integer. 273The D value is obtained. 272
X 100%
× 100%
GB187392002
.....(C. 2)
3 The diffusion and shaping condition when the liquid is dropped is expressed as the difference between the two groups of variation coefficients in the longitudinal and transverse directions, represented by the symbol S(shape). Calculate according to formula C.4.3
(C.3) to obtain the S value.
S(%) =D longitudinal(%) -— D(%)
Where:
Diffusion and shaping condition, %,
Longitudinal variation coefficient;
Transverse variation coefficient.
C.4.4 Take the arithmetic mean of the four samples as the measurement result, A retains one decimal place, D retains one decimal place, and S retains to an integer. 273The D value is obtained. 272
X 100%
× 100%
GB187392002
.....(C. 2)
3 The diffusion and shaping condition when the liquid is dropped is expressed as the difference between the two groups of variation coefficients in the longitudinal and transverse directions, represented by the symbol S(shape). Calculate according to formula C.4.3
(C.3) to obtain the S value.
S(%) =D longitudinal(%) -— D(%)
Where:
Diffusion and shaping condition, %,
Longitudinal variation coefficient;
Transverse variation coefficient.
C.4.4 Take the arithmetic mean of the four samples as the measurement result, A retains one decimal place, D retains one decimal place, and S retains to an integer. 273
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