Some standard content:
Scope of application
National Standard of the People's Republic of China
Burley tobacco
UDC 633.97
GB 8966 --88
This standard applies to burley tobacco that has been cultivated and managed normally, air-cured and re-cured but not fermented. It is mainly based on the written standard, supplemented by physical samples.
Grading, sale, purchase, allocation and supply classification shall be based on this standard. 2 Reference standards
GB2635 Flue-cured tobacco
GB2636 Flue-cured tobacco inspection method
3 Nouns and terms
3.1 Air-cured
Tobacco leaves are cured in air-curing rooms or air-curing sheds under natural climatic conditions without direct sunlight. 3.2 Maturity
Refers to the maturity of the tobacco leaves. It is divided into fully mature, mature and moderately mature. 3.3 Leaf structure refers to the density of tobacco cells. It can be divided into loose, loose, slightly loose, slightly dense, and dense. 3.4 Color
Refers to the different shades of color of tobacco leaves after drying. From light to dark, it can be divided into light yellow, light reddish yellow, nearly reddish yellow, reddish yellow, reddish brown, and slightly green.
3.4.1 Light yellow (buff=L)
Light yellow with a slight red tint.
3.4.2 Light reddish yellow (tan=F)
Light red with yellow spots.
3.4.3 Nearly reddish yellow (tannish red=FR) Red with a slight yellow spot.
3.4.4 Reddish yellow (red=R)
Red with dark yellow spots.
3.4.5 Dark reddish brown (dark red =D)
Red with brown spots.
3.4.6 Slightly greenish-V
The greenish-V content of yellow tobacco leaves is within 20%. 3.5 Finish
Refers to the purity and brightness of the color on the surface of tobacco leaves. It is divided into bright, fairly bright, slightly dark, relatively dark, and dark. 3.6 Body
Refers to the thickness and density of tobacco leaves, or the weight per unit area, expressed in thickness. It is divided into moderate, fairly moderate, slightly thin or slightly thick, relatively thin or relatively thick, thin or thick.
3.7 Length
GB 8966-88
The measurement of the true line of tobacco leaves from the bottom of the main vein to the tip of the leaf, expressed in centimeters. 3.8 Injury tolerance refers to the degree of damage to tobacco leaves caused by breakage, variegation, and waste. 3.8.1 Breakage (break)
Due to factors such as biting, injury, and mechanical damage, the tobacco leaves lose part of their integrity. 3.8.2 Variegated (K)
Refers to the presence of color patches on the surface of tobacco leaves that are different from the basic color, including yellow, gray spots, or whitening. 3.8.3 Waste (waste)
Refers to the damaged part of the tobacco leaves that penetrates through the back of the leaves, causing the tissue to be damaged or lose the strength and firmness of the fibers, such as disease spots, scorch, etc. (excluding thinning).
3.9 Leaf surface
Refers to the flatness or shrinkage of the leaf surface or leaf blade of the tobacco leaf, which can be divided into flatness, slight wrinkles, wrinkles, and shrinkage. 3.10 Elements of grade Refers to the appearance factors used to measure the grade, which can be divided into quality factors and control factors. 3.10.1 Quality factor: Factors that describe or measure the appearance quality of tobacco leaves. 3.10.2 Control factor: Factors that affect or damage the appearance quality of tobacco leaves. 3.11 Codes for terms: C: lower leaf group, B: upper leaf group, N: final grade, L: light yellow, F: light reddish yellow, FR: nearly reddish yellow, R: reddish yellow, D: reddish brown, V: slightly green. 4 Grouping and grading: 4.1 Grouping: According to the location of tobacco leaves, there are two groups: the middle and lower group and the upper group (see Table 1). 4.2 Grades: According to the appearance quality conditions such as leaf maturity, identity, leaf structure, leaf surface, color, gloss, length, and damage, the grades are divided. There are six grades in the middle and lower part, five grades in the upper part, and one final grade, for a total of twelve grades. Table 1
Middle and lower part
5 Technical requirements
Finally to coarsely, covered to slightly exposed, slightly curved near the tip
Coarsely to pasty, relatively exposed to protruding
Grade factors
Wide leaf shape
Leaf tip is relatively
Leaf shape is relatively narrow
Leaf tip is relatively sharp
Flat to wrinkled
Flat to wrinkled
Thin to moderate
Slightly thick to thick
GB 8966—88
Refers to dividing each factor into different degrees and grades and combining them with the corresponding degrees and grades of other related factors to outline the quality status of each level and determine the relative value of each level (see Table 2). Table 2
Grade factors
Maturity
Leaf structure
Quality factors
Controlling factors
Damage degree
Quality regulations are shown in Table 3.
Grade code
Middle and lower part
(B)
Maturity
Mature, fully ripe
Mature, fully ripe
Mature, moderately ripe
Mature, moderately ripe
Mature, moderately ripe
Mildly ripe, moderately ripe
Moderately medium
Thin to thick
Fully ripe, mature, moderately ripe
Thin, relatively thin, slightly thin, moderately ripe, moderately thick, relatively thick, thick and loose, loose, slightly loose, slightly dense, dense
Flat, slightly wrinkled, wrinkled, wrinkled Shrinkage
Light yellow, light reddish yellow, nearly reddish yellow, reddish yellow, reddish brown, bright, still bright, slightly dark, dark, dark, expressed in centimeters
Expressed in percentage
Slightly loose
Slightly loose
Slightly loose
Near reddish yellow, reddish yellow
Still bright
Near reddish yellow, light reddish yellow
Light reddish yellow
Light reddish yellow, light yellow
Red yellow, nearly reddish yellow
Red yellow, reddish brown
Still bright
Degree of injury
cmlPercentage of leaf area allowed
5.3 Grade Description
GB 8966--88
Middle and lower leaf group (C) This group includes waist leaves, lower second shed leaves and foot leaves. Tobacco leaf characteristics: leaf shape is relatively wide, leaf tip is relatively blunt, leaf veins are relatively thin to relatively thick, covered to slightly exposed. Maturity is good, leaf structure is slightly loose to loose, color is close to red yellow to light yellow, body is moderate to thin, foot leaves have ground damage.
Middle and lower first level (C,) is mainly produced in waist leaves. Mature: slightly loose, flat, close to red yellow, or partially red yellow, bright, moderate, damage does not exceed 5%, leaf length is not less than 48cm. Middle and lower second level (C2) is produced in waist leaves and lower second shed leaves. Mature, slightly loose, flat, close to red yellow, or with a small amount of light red yellow, still bright, still moderate, damage does not exceed 10%, leaf length is not less than 45cm. The lower middle level (C3) is produced from the lower two sheds and leaves near the waist. Mature to fully mature, loose, slightly wrinkled, light reddish yellow, slightly dark, slightly thin, the degree of damage does not exceed 15%, and the leaf length is not less than 40cm. The lower middle level (C) is produced from the lower two sheds. Mature to fully mature, loose, slightly wrinkled, light reddish yellow, or partially light yellow, darker, thinner, the degree of damage does not exceed 20%, and the leaf length is not less than 35cm. The lower middle level (Cs)
Mainly produced from the foot leaves, a small amount of the lower two shed leaves. Mature to fairly mature, loose, wrinkled, light yellow, darker, thin, the degree of damage does not exceed 25%, and the leaf length is not less than 30cm. The lower middle level (C) is produced from the foot leaves. Mature to fairly mature, loose, wrinkled, light yellow, dark, thin, the degree of damage does not exceed 30%, and the leaf length is not less than 25cm.
Upper leaf group (B) This group includes the upper two sheds and top leaves. Tobacco leaf characteristics: narrow leaf shape, sharp leaf tip, thick and exposed veins, slightly loose to dense leaf structure, red-yellow to red-brown color, slightly thick to thick. Upper Grade 1 (B,) is produced in the upper second shed. Mature, slightly loose, flat, red-yellow or partially red-yellow, still bright, slightly thick, damage not exceeding 10%, leaf length not less than 45cm. Upper Grade 2 (B2) is produced in the upper second shed and tobacco leaves close to the upper second shed. Mature, slightly dense, slightly wrinkled, red-yellow or a small part of red-brown, slightly darker, thicker, damage not exceeding 15%, leaf length not less than 40cm. Upper Grade 3 (B3) is produced in the upper second shed and top leaves. Mature to still mature, slightly dense, slightly wrinkled, red-brown, darker, thicker, damage not exceeding 20%, leaf length not less than 35cm.
Upper Grade 4 (B) is mainly produced in the top leaves. Mature to moderately mature, dense, wrinkled, reddish brown, dark, thick, damage not exceeding 25%, leaf length not less than 30cm.
Upper Grade 5 (B,) Produced from top leaves. Mature to moderately mature, dense, wrinkled, reddish brown, dark, thick, damage not exceeding 30%, leaf length not less than 25cm.
Ungraded (N) Tobacco leaves with quality lower than the lowest grade of the upper and middle and lower leaf groups are classified as this grade. The leaves are thin to thick, damage not exceeding 40%, and length not less than 25cm.
5.4 Principles for the treatment of several types of tobacco leaves:
5.4.1 Sun-cured or cured burley tobacco leaves that do not meet this standard shall be rejected. 5.4.2 Grades below the middle grade 5 and upper grade 4 are allowed to have a slightly green area of no more than 10%, and the last grade is allowed to have a slightly green area, with a green content of less than 20% or an area of no more than 30%. Www.bzxZ.net
Note: In this standard, all "below grade ××" include grade ××. 5.4.3 Extinguished tobacco leaves (referring to those with a smoldering duration of less than 2s), if the extinguishment rate exceeds 15%, shall not be purchased. 5.4.4 Tobacco leaves with active tendons, wet tendons and moisture exceeding the specified value must be re-dried before being sold, and shall not be purchased by deducting moisture. 5.4.5 Tobacco leaves with no use value for cigarettes, such as withered, black dregs, tobacco tips, tobacco seedlings, tobacco rights, mildew (due to deterioration), as well as tobacco stems, broken tobacco and slightly green areas exceeding 30% shall not be purchased. 5.4.6 The base leaves are graded below grade 5 in the middle, and the top leaves are graded below grade 3 in the upper part. 5.4.7 Tobacco leaves contaminated with banned pesticides such as DDT, 666, 1605, 1059, etc. are strictly prohibited from being purchased. 5.5 For the provisions on purity tolerance, moisture content and natural sand and soil ratio, see Table 4. Grade
Purity tolerance shall not exceed
GB 8966-88
15~182)
Note: 1) The purity tolerance specified in the table refers to the upper and lower grades. 2) The moisture content in the fourth quarter is 15%~17%.
Re-cured tobacco
11 ~ 13
Natural sand content shall not exceed
Re-cured tobacco
5.6 The natural bundle shall be used as the standard. The circumference of the bundle head is 100~120mm. The bundle material must be made of burley tobacco leaves of the same grade. The width of the "tobacco wrap" is 30~50mm. The tobacco bundle must be tied tightly, and the exposed part of the bundle head shall not exceed 10mm. The top of the bundle head shall not be wrapped. There shall be no straw, tobacco, tobacco seedlings, tobacco buds, fragments, short stems and other adulterants in the tobacco bundle. 5.7 Burley tobacco is classified as a certain grade only when its maturity, identity, leaf structure, leaf surface, color and gloss all reach a certain grade. Length and damage are control indicators and shall be implemented as specified. 5.8 Export burley tobacco is based on this standard. If there are special requirements, they can be handled according to the agreement reached. 6
Inspection method
Inspect in accordance with GB2636.
7 Acceptance rules
7.1 The number of samples for on-site inspection is 10% to 20% of the samples for each burley tobacco (referring to the same grade of burley tobacco in the same region) within 100 pieces, and 5% to 10% of the samples for the part exceeding 100 pieces. If necessary, the sampling ratio shall be increased as appropriate. Each piece shall be inspected at 5 to 7 locations from the center to the surroundings, totaling about 3 to 5 kg. Unfinished tobacco leaves can be inspected in full, or 6 to 9 locations shall be taken according to the parts, 3 to 5 kg or 30 to 50 pieces for inspection.
When any party disagrees with the inspection results during the on-site inspection, it shall be submitted to the higher-level competent department for inspection in accordance with the provisions of GB2636. If there is still disagreement with the inspection results, it can be re-inspected, and the re-inspection shall prevail. 7.2 Preparation and implementation of physical samples
GB 8966--88
7.2.1 Physical samples are divided into basic samples and imitation samples, both of which are representative samples. Basic samples are formulated according to the written standards, reviewed by the relevant departments, and reported to the National Bureau of Standards for approval and implementation after national balancing. Basic samples are updated every three years. Imitation samples are imitated by tobacco companies in provinces, cities, and autonomous regions or entrusted to grassroots units to imitate and send to provincial tobacco companies for approval, and are approved and implemented by the provincial Bureau of Standards. Imitation samples are updated once a year.
7.2.2 Preparation of physical samples
Physical samples are mainly composed of leaves of medium quality of various grades, including roughly equal numbers of better and worse leaves, with 15 to 25 leaves per bunch.
When preparing samples, undamaged leaves can be used. When sealing, indicate the grade, number of leaves in the bunch, date, and stamp the approval unit. Implementation of physical samples
7.2.3.1 When implementing, the overall quality level of the physical samples should be used as a reference. 7.2.3.2 When there is a dispute over the imitation sample, the basic sample should be used as the basis. 8 Packaging, marking, transportation, storage and preservation
8.1 Packaging
Each piece of burley tobacco must be tobacco leaves of the same production area and the same grade. There shall be no foreign matter, excessive moisture or moldy and deteriorated tobacco leaves in cigarette packs or boxes. The natural broken tobacco shall not exceed 3%. 8.1.2 The tobacco packaging materials must be firm, dry, clean, free of odor and residual poison. 8.1.3 When packing tobacco leaves, put the heads outward, arrange them neatly, press them in sequence, and keep the package upright. Bundle three horizontal and two vertical, and sew the package with no less than 40 stitches. The net weight of each package in gunny bags is 60 and 50kg. The outer dimensions of the 60kg package are 40cm×60cm×85cm, and the 50kg package is 8.1.4
40cm×50 (60) cm×80cm. Pack in cartons, with a net weight of 200kg per box. 8.2 Marking
The following should be indicated on the front of the cigarette package or the body of the cigarette box: 8.2.1
Origin (province, county),
Grade (in capital letters),
Weight (net weight, tare weight),
Product year,
Name of the purchasing unit or redrying factory.
Grade and code should be indicated on both ends of the cigarette package or cigarette box. 8.2.22
Special tobacco leaves should be added with special symbols after the grade and code of the cigarette package: "W" symbol for tobacco leaves with excessive moisture content, and "PS" symbol for bottom leaves with excessive natural sand content. b.
The marking must be clear, and the acceptance card should be placed in the package. 8.2.4
8.3 Transportation
During transportation, cigarette packages and boxes must be covered, tightly packed and covered to avoid sunlight and moisture, and must not be transported together with odorous and 8.3.1
toxic items. Tobacco leaves must not be transported on odorous and contaminated transport vehicles. 8.3.2 Be careful when loading and unloading, and do not drop or hook the packages. 8.4 Storage and preservation
8.4.1. The stacking height during storage is no more than 4 packs for top-grade tobacco, no more than 5 packs for medium-grade tobacco, no more than 6 packs for other grades, and no more than 7 packs for re-cured tobacco. 8.4.2 The storage place for tobacco packs must be dry and ventilated, and must not be close to stoves and oil warehouses, and must not be stored together with odorous and toxic items. The tobacco packs must be placed on cushions 300mm above the ground and walls and columns. 8.4.3 When stacked in the open air, there must be rainproof covers on and around the top, and the surroundings must be sealed tightly. The bottom of the stack must be more than 300mm above the ground. The ends of the cushions must be flush with the tobacco packs to prevent rainwater from soaking through the cushions. 419
GB8966—88
During storage, regular inspections must be carried out to prevent deterioration and insect infestation. Ensure the safety of the goods. Additional remarks:
This standard was proposed by China National Tobacco Corporation. This standard was drafted by Zhengzhou Tobacco Research Institute of China National Tobacco Corporation. The main drafters of this standard are Yu Huatang, Li Yalong, He Wensheng, Chen Hanxin and Shi.
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