1. Maturity: refers to the maturity of cured tobacco leaves (including field maturity and cured maturity), and the maturity is divided into the following grades.

(1) mellow: refers to the upper tobacco leaves reaching high maturity in the field and fully mature after modulation.

(2) Maturation: The tobacco leaves are fully matured in the field and after baking.

(3) Maturity: Tobacco leaves have just reached maturity in the field, and the biochemical changes are not sufficient or mature enough after improper modulation.

(4) Immature: The tobacco leaves in the field are immature.

(5) Early maturity: generally refers to the foot leaves, whose appearance is too early, but they are not really mature.

2. Leaf structure: refers to the density of tobacco cells, which is divided into the following grades:

(1) Open

(2) Firmness

(3) slightly close

(4) Tightness

3. Body: refers to the thickness, density or weight per unit area of tobacco leaves. In terms of thickness, it is divided into the following grades:

(1) thin

(2) Not too thin

(3) Medium

(4) Meat quality

(5) heavy

4. Oil: a soft semi-liquid substance contained in tobacco leaves, which can be divided into the following grades according to its content:

(1) Rich: rich in oil and smooth in appearance.

(2) Oiliness: There is still a lot of oil, which looks very oily.

(3) less oil: less oil, the appearance is still oily.

(4) Thin: poor oil content, no oily feeling on the surface.

5. Color intensity: refers to the saturation range and intensity of tobacco surface color, which is divided into the following grades:

(1) Depth: The color of the blade surface is uniform and saturated.

(2) Intense: the color is uniform and the saturation is slightly inferior.

(3) Moderate: uniform color and average saturation.

(4) Weak: uneven color and low saturation.

(5) Pale: uneven color and light color.

6. Length: the distance from the stem end to the tip of the main vein of the leaf, expressed in centimeters.

7. Waste: the tissue of tobacco leaves is destroyed, losing the strength and firmness of silk, and the use value is extremely low, expressed as a percentage.

8. Damage: The integrity of the blade is damaged and lost, expressed as a percentage.

9. Color: the state of related color, color saturation and color price of the same type of tobacco leaves after modulation. Divided into the following colors:

(1) Lemon: The appearance of tobacco leaves is completely yellow or slightly inconspicuous red, which is within the color gamut of light yellow and positive yellow.

(2) Orange: The appearance of tobacco leaves is orange-red, which is within the color gamut of golden yellow and dark yellow.

(3) Red: The appearance of tobacco leaves is red or light brownish yellow, which is within the color gamut of red, yellow and brownish yellow.

10. Greenish: refers to yellow tobacco leaves with blue veins or slightly floating blue areas within the range of 10%.

1 1. Green: refers to yellow tobacco leaves containing any visible cyan, not exceeding 30%.

12. Smoothness: refers to the smoothness or hardness of tobacco tissue. Any leaf with a smooth or hard area exceeding 20% is classified as smooth.

13. variegated color: refers to the non-basic color blocks on the surface of tobacco leaves (except blue and yellow tobacco), including mild gluten, steamed slices and local ash hanging, whole leaf pollution, more green marks, serious red burning, flushing, and leaves being damaged by aphids. Where the variegated area reaches or exceeds 20%, it is regarded as variegated leaves.

14. color code: the colors in grading are represented by the following codes: L- lemon yellow, F- orange yellow, R- reddish brown, K- variegated, V- microstrip cyan, Gy- cyan yellow.

15. Grouping code: Grouping is represented by the following codes: CX- cutter or lug, B- blade, H- blade, C- cutter, X- lug and S- smooth.

Three. Acceptance rules

First, the principle of grading. When the maturity, leaf structure, identity, oil content, chromaticity and length of flue-cured tobacco meet certain requirements, it will be rated as a certain grade, with damage and residual injury as control indicators, and the length shall not be less than the specified percentage.

Second, the determination of the last level. If the recheck is inconsistent with the determined grade, the original grade is invalid.

Third, a batch of tobacco leaves is between the boundaries of two colors, and should be properly colored and graded according to other qualities.

Fourth, a batch of tobacco leaves is set at a lower grade at the boundary between the two grades.

Fifthly, a batch of tobacco grade factors are set as Grade B, and if one factor is lower than Grade B, it is Grade C; One or more factors are higher than Grade B, and it is still Grade B. ..

Sixth, green leaves, frosted tobacco leaves, fire injury, fire smoke, odor, mildew, doping, moisture overrun and so on. It's not classified.

Seventh, the middle leaves shorter than 35 cm are divided into the lower leaf group.

Eighth, tobacco leaves with variegated areas exceeding 20% shall be classified according to variegated groups.

Ninth, tobacco leaves with mottled area less than 20% are allowed to be graded in the positive group, but the sum of mottled and residual injury shall not exceed the percentage of residual injury of the corresponding grade, and the excess shall be designated as the next grade; If the sum of noise and disability exceeds the minimum allowable disability level of this group, it can be graded appropriately in the noise group.

Tenth, smoke fading is graded in smooth leaf group.

Eleventh light red flue-cured tobacco that has no obvious effect on the basic color should be rated below the second grade in the corresponding position and color group.

Twelfth, the damage is calculated according to the percentage of the total damaged area in a cigarette to the actual total damaged area; The integrity of each tobacco leaf must reach more than 50%, and less than 50% is classified as foreign tobacco.

Thirteenth, all tobacco leaves that are not included in the standard grade but still have use value can be regarded as foreign tobacco. The purchasing department can decide whether to purchase according to the needs of users.

IV. Acceptance specifications

(1) moisture content of tobacco leaves: generally, the moisture content of primary flue-cured tobacco leaves is 16 ~ 18% (including 16 ~ 17% from April to September), and the moisture content of secondary flue-cured tobacco leaves is1/kloc-.

(2) Sandy soil rate: the natural sandy soil rate does not exceed 65,438+0.65,438+0% for primary flue-cured tobacco and 65,438+0% for secondary flue-cured tobacco.

(3) Damage rate and purity error: middle orange (C 1F, C2F, C3F), lemon yellow 1, grade 2 (C 1L, C2L), upper orange (B 1F, B2F), lemon yellow. The lemon yellow in the middle is Grade 3 (C3L), the orange in the lower part is 1 Grade, Grade 2, Grade 3 (X 1F, X2F, X3F), and the lemon yellow is 1 Grade, Grade 2 (X 1L, X2L). The damage rate and purity error of smooth leaves in the lower shed (X2V), the middle shed (C3V), the upper shed (B2V, B3V) and the grade of 1 (S 1) are controlled at 15% and 20% respectively. Upper lemon yellow grade 4 (B4L), lower lemon yellow grades 3 and 4 (X3L, X4L), orange grade 4 (X4F), smooth leaf grade 2 (S2), middle and lower mottled 1, 2 (CX 1K, CX2K), upper mottled 1,.

(4) Tie handles: specifications require natural handles, and each handle has 25-30 leaves. The circumference of the handle is 100- 120mm, and the winding width is 50mm.

Verb (abbreviation of verb) checking method

A, check according to the 15 rating system.

Second, export supply can be carried out in accordance with the methods stipulated in the agreement between the supply and demand sides.

Third, the physical sample is one of the certificates for inspection and grading, and once confirmed by both parties, it is the basis for inspection.

Intransitive verbs package, mark, transport and store.

(1) packaging

First, each package (slice) of flue-cured tobacco must be of the same origin and grade. During the handover of supply and demand, the natural debris of each package (piece) shall not exceed 3%.

Two, packaging materials must be solid, dry, clean, no odor, no residual poison.

Three, the cigarette butts in the package (piece) should be neatly arranged and pressed in order, and there can be no sundries.

Fourth, the type of packaging. There are two kinds of packaging: linen packaging and carton packaging: ① linen packaging. The net weight of each package is divided into 50 kg and 60 kg, with a package volume of 40 cm× 60 cm× 80 cm for 50 kg and 40 cm× 65 cm× 85 cm for 60 kg. ② Carton packaging. The net weight of each box is 200 kg, the internal diameter specification is 1.097mm× 672mm× 705mm, and the external diameter specification is1.1/5mm× 690mm× 725mm.

(2) signs

First, the handwriting must be clear, and the identification card should be put in the bag.

Second, the identification content: ① place of origin; ② Level (capital and code); ③ weight; ④ Year and month of the product; ⑤ Name of supplier.

Third, the packaging should be marked with grades and codes.

(3) Transportation

First, when transporting the package, there must be a cover on it, which should be tightly wrapped and covered, and protected from sun and moisture.

Second, it is not allowed to mix with odor and toxic substances, and it is not allowed to ship vehicles with odor and pollutants.

Third, when handling, you must handle it with care, and don't let the package fall or hook.

(4) Guarantee management

1. Stacking height: 1 ~ 2 grade (excluding grouping grade 2), the height of the first flue-cured tobacco packed in gunny bags shall not exceed 5 bales, the height of the third and fourth grades shall not exceed 6 bales, and the height of the second flue-cured tobacco shall not exceed 7 bales. Carton packaging is not subject to this restriction.

2. Location: It must be dry and ventilated, with high terrain, not relying on fire sources and oil depots.

3. Packaging space: It must be placed on the mat at least 300 mm above the ground and at least 300 mm away from the house wall.

4. Do not mix with toxic substances or odorous substances.

5. Stacking in the open air: There must be a rain-proof and sun-proof cover around and sealed. The bottom of the pile is above 300 mm from the ground, and the wood (stone) is well padded to prevent rainwater from invading.

6. Safety: During storage, be sure to prevent moisture, mildew and insects, and check regularly to ensure the safety of goods.

Advantages of Grade 7 and Grade 40 national flue-cured tobacco standards

First, the distinction of tobacco quality is more reasonable. After grouping by position and color, the quality of tobacco leaves in the same group was purified, which was close to the national advanced standard and met the export needs.

Secondly, it promoted the improvement of the production level of the three drugs, and solved the problems of good maturity, dark color, slightly dark luster, many mature spots or even different degrees of red star disease tobacco leaves. The quality of this part of tobacco leaves is high, which relaxes the requirements for diseased spots and luster.

Third, it is convenient for grading operation and easy to be accepted by tobacco farmers. Tobacco farmers report that it sounds difficult and easy to do. The number of groups and series increases, the grade difference decreases, and it is easy to master.

Fourth, the grade difference is small and reasonable, which avoids the competition between grade and price and ensures the order of acquisition.

Fifth, on the basis of the improvement of standardized planting level, the income of tobacco farmers has increased significantly.

Eight, the implementation of 40 national standards for flue-cured tobacco should pay attention to the problem.

First, places with low production levels are not suitable for the three modernizations. According to a rough estimate, only 30 ~ 40% of tobacco fields in China meet the requirements of three-chemical production. If you are eager to promote it, it will be counterproductive.

Second, in areas with a high level of industrialization, modernization and industrialized production, when implementing the 40-level system, the purchase of the 15 level system should be stopped to prevent the two standards from overlapping.

Third, before the cigarette formula structure has not changed, don't rush to fully implement it.

Fourth, only by strengthening organizational leadership and doing technical training can it be better implemented.