A method for fermenting floral cigars based on seasonal changes

Abstract

This invention discloses a seasonally-based floral cigar fermentation method. By selecting seasonal flowers as the fermentation medium, it proposes key fermentation technical parameters and process control methods for different types of cigar tobacco leaves. The cigar fermentation method of this invention can not only reduce the irritation of tobacco leaves, reduce off-flavors and enrich aroma, but also endow the fermented cigar tobacco leaves with a seasonally-changing floral smoking taste, improving the quality of cigars while increasing fun and playability.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and in particular to a fermentation method for floral-scented cigars based on seasonal changes. Background Technology

[0002] In cigar tobacco production, the quality of raw materials is affected by techniques such as variety, cultivation, drying and fermentation. Among these, fermentation is the most critical step in improving the quality of cigar tobacco. A suitable fermentation process can effectively improve the appearance quality, physical properties, chemical composition and sensory quality of tobacco leaves, and is the core technology of cigar tobacco production.

[0003] After the cigars are dried, they undergo agricultural and industrial fermentation. Only after these two fermentations can the tobacco leaves be used in the rolling of cigars. The purpose of agricultural fermentation is to promote the degradation and transformation of macromolecules such as starch and protein in the tobacco leaves, reduce the grassy and irritating smells of the tobacco leaves, and bring out their characteristic aromas. Industrial fermentation, on the other hand, is a secondary fermentation of cigar tobacco leaves by industrial enterprises using different methods and technologies under certain temperature and humidity conditions. Its purpose is to give the tobacco leaves the style and characteristics required according to the brand's needs.

[0004] In recent years, with the increasing acceptance of cigars among domestic consumers, the sales of domestically produced cigars have grown rapidly, demand has continued to expand, and competition has become increasingly fierce. Every industrial enterprise is eager to win the market with truly differentiated products. However, the raw material sources of domestic cigar manufacturers are largely the same, which makes the products increasingly homogenized. Therefore, starting from developing distinctive industrial fermentation processes can help improve the core competitiveness of products and is also an important means of tapping into potential consumer markets. Summary of the Invention

[0005] The purpose of this invention is to provide a seasonally-based floral cigar fermentation method to address the aforementioned problems. This invention selects seasonal flowers as the fermentation medium, conducts targeted research on key fermentation parameters and process control methods for different types of cigar tobacco leaves, explores and determines technical methods that can effectively improve target quality elements during fermentation, and ultimately forms a unique floral cigar fermentation process. This unique cigar fermentation process not only reduces the harshness of the tobacco leaves, lessens off-flavors, and enriches the aroma, but also imparts a seasonally varied floral smoking experience to the fermented cigar tobacco leaves, enhancing both the quality of the cigars and their appeal and enjoyment.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] A seasonally-dependent fermentation method for floral-scented cigars includes the following steps:

[0008] Step S1, flower pretreatment: On a sunny and windless day, pick fresh flowers that are free from pests and diseases and are plump. Lay the picked flowers flat in a cool and ventilated place to dry naturally. Turn the flowers over regularly until the moisture content of the flowers drops to a suitable range, then collect and bag them.

[0009] Step S2, Primary Fermentation of Tobacco Leaves: Place the rehydrated tobacco leaves in a fermentation room for primary fermentation;

[0010] Step S3, secondary fermentation of tobacco leaves: The flowers treated in step S1 and the tobacco leaves that have undergone primary fermentation in step S2 are evenly spread in a certain weight ratio and then placed in a fermentation room for secondary fermentation.

[0011] Step S4, flower enhancement: Remove the flowers from the tobacco leaves after the second fermentation in step S3, re-weigh the flowers after the treatment in step S1, and weigh them again to the same weight as in step S3. Then, spread the tobacco leaves after removing the flowers and the re-weighed flowers evenly in the same way as in step S3, and place them in the same fermentation room as in step S3 to continue the second fermentation. Repeat the flower enhancement operation in step S4 until the fermentation is completed.

[0012] Step S5, Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balancing and then natural aging.

[0013] A further proposed method is as follows: In step 1, camellias are harvested from January to March each calendar year, gardenias from April to June, osmanthus from July to September, and plum blossoms from October to December. The ambient temperature for natural drying is 10-15℃ for camellias and plum blossoms, and 20-25℃ for gardenias and osmanthus. The flowers are laid out in a single layer, and camellias and plum blossoms are turned over every 2-3 hours, while gardenias and osmanthus are turned over every 0.5-1 hour. The moisture content of camellias and plum blossoms is 18-20%, while that of gardenias and osmanthus is 16-18%.

[0014] A further step is as follows: In step 2, the moisture content of the eggplant wrapper tobacco leaves after rehydration is 20-22%, the ambient temperature and humidity of the fermentation room are 30-35℃ and 70-75%, and the fermentation cycle is 1-2 days; the moisture content of the eggplant binder tobacco leaves after rehydration is 22-25%, the ambient temperature and humidity of the fermentation room are 35-40℃ and 75-80%, and the fermentation cycle is 7-9 days; the moisture content of the eggplant core tobacco leaves after rehydration is 25-27%, the ambient temperature and humidity of the fermentation room are 40-45℃ and 80-85%, and the fermentation cycle is 15-20 days.

[0015] A further step is to use 0.1-0.2 kg of flowers per 1 kg of eggplant wrapper tobacco leaves, 0.2-0.3 kg of flowers per 1 kg of eggplant binder tobacco leaves, and 0.3-0.4 kg of flowers per 1 kg of eggplant core tobacco leaves, spreading them evenly in a layer-by-layer manner. The temperature and humidity of the fermentation room are 30-35℃ and 70-75%, and the fermentation cycle is 12-18 hours.

[0016] A further step is to perform the following in step 4: the wrapper tobacco leaves are patterned 2-4 times, the binder tobacco leaves 5-7 times, and the core tobacco leaves 8-10 times.

[0017] A further proposed method is as follows: In step 5, the moisture content of the tobacco leaves after moisture balance is 17±1%, the aging time of the wrapper is 7 days, the aging time of the binder tobacco leaves is 30 days, the aging time of the core tobacco leaves is 60 days, and the ambient temperature and humidity for tobacco leaf aging is 23±2℃ and 60-65%.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The tobacco leaves fermented by the technical method of the present invention can reduce the green and impurities of tobacco leaves, reduce irritation, and improve the industrial usability of tobacco leaves;

[0020] (2) Enhance and enrich the characteristic aroma of tobacco leaves, while giving tobacco leaves different taste characteristics, and create a distinct four-season floral cigar smoking experience.

[0021] (3) Floral cigars based on different seasons can increase consumers’ interest in purchasing, while also increasing the fun and playability of the smoking process and enhancing brand loyalty. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] Materials: Tobacco wrappers, binders, and fillers from a random production batch from January to March 2022 were used for experimental verification. The materials are shown in Table 1.

[0025] Table 1 Test Materials

[0026]

[0027] Implementation plan:

[0028] S1 Flower Pretreatment: On a sunny and windless day, pick plump camellia flowers that are free from pests and diseases. Lay the camellia flowers in a single layer and place them in a cool and ventilated place with an ambient temperature of 15℃ to air dry naturally. Turn the flowers over every 3 hours until the moisture content of the flowers drops to 20%, then collect and bag them.

[0029] S2 Tobacco Leaf Primary Fermentation: Take 10 kg each of eggplant wrapper, eggplant binder, and eggplant core tobacco leaves for rehydration. After rehydration, the moisture content of the eggplant wrapper tobacco leaves should be controlled at 22%, the moisture content of the eggplant binder tobacco leaves should be controlled at 25%, and the moisture content of the eggplant core tobacco leaves should be controlled at 27%. Place the rehydrated eggplant wrapper tobacco leaves in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 1 day, the eggplant binder tobacco leaves in a fermentation room with an ambient temperature and humidity of 35℃ and 75% for 7 days, and the eggplant core tobacco leaves in a fermentation room with an ambient temperature and humidity of 40℃ and 80% for 15 days.

[0030] S3 Secondary fermentation of tobacco leaves: Take 1kg, 2kg and 3kg of camellia flowers after the treatment in step S1, and then spread them evenly with the eggplant wrappers, eggplant sleeves and eggplant core tobacco leaves after the initial fermentation in step S2, in the manner of one layer of tobacco leaves and one layer of flowers. After spreading, place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours for fermentation.

[0031] S4 Flower Removal: Remove the flowers from the eggplant wrappers, eggplant binders, and eggplant core tobacco leaves that have reached the fermentation cycle in step S3. Weigh out 1kg, 2kg, and 3kg of camellia flowers that have been treated in step S1. Then, evenly spread the tobacco leaves with the flowers removed and the re-weighed camellia flowers and place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours. Repeat the flower removal operation in step S4 in sequence. Repeat the flower removal operation 4 times for the eggplant wrapper tobacco leaves, 7 times for the eggplant binder tobacco leaves, and 10 times for the eggplant core tobacco leaves. Stop fermentation after reaching the number of flower removal operations.

[0032] S5 Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balance. The moisture content after moisture balance is controlled at 18%. Then, the tobacco leaves are transferred to an environment of 25℃ and 65% moisture for natural aging. The wrapper is aged for 7 days, the binder for 30 days, and the core for 60 days. After the aging time is reached, samples are taken for smoking evaluation.

[0033] Example 2

[0034] Materials: Tobacco wrappers, binders, and fillers from a random production batch from April to June 2022 were used for experimental verification. The materials are shown in Table 2.

[0035] Table 2 Test Materials

[0036]

[0037] Implementation plan:

[0038] S1 Flower Pretreatment: On a sunny and windless day, pick plump gardenia flowers that are free from pests and diseases. Lay the gardenia flowers in a single layer and place them in a cool and ventilated place with an ambient temperature of 25℃ to air dry naturally. Turn the flowers over once every 1 hour until the moisture content of the flowers drops to 18%, then collect and bag them.

[0039] S2 Tobacco Leaf Primary Fermentation: Take 10 kg each of eggplant wrapper, eggplant binder, and eggplant core tobacco leaves for rehydration. After rehydration, the moisture content of the eggplant wrapper tobacco leaves should be controlled at 22%, the moisture content of the eggplant binder tobacco leaves should be controlled at 25%, and the moisture content of the eggplant core tobacco leaves should be controlled at 27%. Place the rehydrated eggplant wrapper tobacco leaves in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 1 day, the eggplant binder tobacco leaves in a fermentation room with an ambient temperature and humidity of 35℃ and 75% for 7 days, and the eggplant core tobacco leaves in a fermentation room with an ambient temperature and humidity of 40℃ and 80% for 15 days.

[0040] S3 Secondary fermentation of tobacco leaves: Take 1kg, 2kg and 3kg of gardenia flowers after the treatment in step S1, and then spread them evenly with the eggplant wrappers, eggplant sleeves and eggplant core tobacco leaves after the initial fermentation in step S2, in the manner of one layer of tobacco leaves and one layer of flowers. After spreading, place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours for fermentation.

[0041] S4 Flower Removal: Remove the flowers from the eggplant wrappers, eggplant binders, and eggplant core tobacco leaves that have reached the fermentation cycle in step S3. Weigh out 1kg, 2kg, and 3kg of gardenia flowers that have been treated in step S1. Then, evenly spread the tobacco leaves with the flowers removed and the newly weighed gardenia flowers, and place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours. Repeat the flower removal operation in step S4 in sequence. Repeat the flower removal operation 4 times for the eggplant wrapper tobacco leaves, 7 times for the eggplant binder tobacco leaves, and 10 times for the eggplant core tobacco leaves. Stop fermentation after reaching the required number of flower removal operations.

[0042] S5 Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balance. The moisture content after moisture balance is controlled at 18%. Then, the tobacco leaves are transferred to an environment of 25℃ and 65% moisture for natural aging. The wrapper is aged for 7 days, the binder for 30 days, and the core for 60 days. After the aging time is reached, samples are taken for smoking evaluation.

[0043] Example 3

[0044] Materials: Three production batches of citrus wrappers, binders, and fillers from July to September 2022 were randomly selected for experimental verification. The materials are shown in Table 3.

[0045] Table 3 Test Materials

[0046]

[0047] Implementation plan:

[0048] S1 Flower Pretreatment: On a sunny and windless day, pick plump osmanthus flowers that are free from pests and diseases. Lay the osmanthus flowers in a single layer and place them in a cool and ventilated place with an ambient temperature of 20℃ to air dry naturally. Turn the flowers over every 0.5 hours until the moisture content of the flowers drops to 16%, then collect and bag them.

[0049] S2 Tobacco Leaf Primary Fermentation: Take 10 kg each of eggplant wrapper, eggplant binder, and eggplant core tobacco leaves for rehydration. After rehydration, the moisture content of the eggplant wrapper tobacco leaves should be controlled at 20%, the moisture content of the eggplant binder tobacco leaves should be controlled at 22%, and the moisture content of the eggplant core tobacco leaves should be controlled at 25%. Place the rehydrated eggplant wrapper tobacco leaves in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 1 day, the eggplant binder tobacco leaves in a fermentation room with an ambient temperature and humidity of 35℃ and 75% for 7 days, and the eggplant core tobacco leaves in a fermentation room with an ambient temperature and humidity of 40℃ and 80% for 15 days.

[0050] S3 Secondary fermentation of tobacco leaves: Take 1kg, 2kg and 3kg of osmanthus flowers after the treatment in step S1, and then spread them evenly with the eggplant wrappers, eggplant sleeves and eggplant core tobacco leaves after the initial fermentation in step S2, in the manner of one layer of tobacco leaves and one layer of flowers. After spreading, place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours for fermentation.

[0051] S4 Flower Removal: Remove the flowers from the eggplant wrappers, eggplant binders, and eggplant core tobacco leaves that have reached the fermentation cycle in step S3. Weigh 1kg, 2kg, and 3kg of osmanthus flowers that have been treated in step S1, respectively. Then, evenly spread the tobacco leaves with the flowers removed and the re-weighed osmanthus flowers, and place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours. Repeat the flower removal operation in step S4 in sequence. Repeat the flower removal operation for the eggplant wrapper tobacco leaves twice, the eggplant binder tobacco leaves five times, and the eggplant core tobacco leaves eight times. Stop fermentation after reaching the required number of flower removal operations.

[0052] S5 Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balance. The moisture content after moisture balance is controlled at 16%. Then the tobacco leaves are transferred to an environment of 21℃ and 60% moisture for natural aging. The wrapper is aged for 7 days, the binder for 30 days, and the core for 60 days. After the aging time is reached, samples are taken for evaluation.

[0053] Example 4

[0054] Materials: Three production batches of citrus wrappers, binders, and fillers from October to December 2022 were randomly selected for experimental verification. The materials are shown in Table 4.

[0055] Table 4 Test Materials

[0056]

[0057] Implementation plan:

[0058] S1 Flower Pretreatment: On a sunny and windless day, pick plump plum blossoms that are free from pests and diseases. Lay the plum blossoms in a single layer and place them in a cool and ventilated place with an ambient temperature of 10℃ to air dry naturally. Turn the flowers over every 2 hours until the moisture content of the flowers drops to 18%, then collect and bag them.

[0059] S2 Tobacco Leaf Primary Fermentation: Take 10 kg each of eggplant wrapper, eggplant binder, and eggplant core tobacco leaves for rehydration. After rehydration, the moisture content of the eggplant wrapper tobacco leaves should be controlled at 20%, the moisture content of the eggplant binder tobacco leaves should be controlled at 22%, and the moisture content of the eggplant core tobacco leaves should be controlled at 25%. Place the rehydrated eggplant wrapper tobacco leaves in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 1 day, the eggplant binder tobacco leaves in a fermentation room with an ambient temperature and humidity of 35℃ and 75% for 7 days, and the eggplant core tobacco leaves in a fermentation room with an ambient temperature and humidity of 40℃ and 80% for 15 days.

[0060] S3 Secondary Fermentation of Tobacco Leaves: Take 1kg, 2kg and 3kg of plum blossoms after the treatment in step S1, and then spread them evenly with the eggplant wrappers, eggplant sleeves and eggplant core tobacco leaves after the initial fermentation in step S2, in the manner of one layer of tobacco leaves and one layer of plum blossoms. After spreading, place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours for fermentation.

[0061] S4 Flower Removal: Remove the flowers from the eggplant wrappers, eggplant binders, and eggplant core tobacco leaves that have reached the fermentation cycle in step S3. Weigh 1kg, 2kg, and 3kg of the plum blossoms treated in step S1, respectively. Then, evenly spread the tobacco leaves with the flowers removed and the re-weighed plum blossoms, and place them in a fermentation room with an ambient temperature and humidity of 30℃ and 70% for 12 hours. Repeat the flower removal operation in step S4 in sequence. Repeat the flower removal operation for the eggplant wrapper tobacco leaves twice, the eggplant binder tobacco leaves five times, and the eggplant core tobacco leaves eight times. Stop fermentation after reaching the required number of flower removal operations.

[0062] S5 Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balance. The moisture content after moisture balance is controlled at 16%. Then the tobacco leaves are transferred to an environment of 21℃ and 60% moisture for natural aging. The wrapper is aged for 7 days, the binder for 30 days, and the core for 60 days. After the aging time is reached, samples are taken for evaluation.

[0063] Comparative Examples

[0064] Tobacco leaves from the same production batch and with the same enterprise code as those in Examples 1-4, and produced using conventional fermentation methods, were randomly selected as controls for comparison and smoking evaluation. The Great Wall Cigar Factory's "Cigar Style Characteristic Evaluation Scoring Table" was then used for scoring, and the results are shown in Tables 5-8.

[0065] Table 5. Evaluation Scoring Table for Style Characteristics of Cigars in Batch 20220216

[0066]

[0067] Table 6. Evaluation Scoring Table for Style Characteristics of Cigars Batch 20220607

[0068]

[0069] Table 7. Evaluation Scoring Table for Style Characteristics of Cigars Batch 20220930

[0070]

[0071] Table 8. Evaluation Scoring Table for Style Characteristics of Cigars Batch 20221211

[0072]

[0073] The experiment selected four batches of tobacco leaves (wrapper, binder, and core) from actual production between January and December 2022 for verification. Simultaneously, tobacco leaves from the same production batch, with the same enterprise code, and using conventional fermentation methods were randomly selected for comparative smoking evaluation. The results are shown in Tables 5-8. Compared with conventional fermentation, tobacco leaves fermented with camellia flowers exhibited a richer aroma, particularly a more prominent fruity aroma, while also effectively reducing the grassy or unpleasant odors in the tobacco leaves. Gardenia flowers primarily enhanced the sweet aroma of the tobacco leaves, improving the smoothness and richness of the smoke, while also making the smoke more delicate and the aftertaste more comfortable. Tobacco leaves fermented with osmanthus flowers had a predominantly sweet and floral aroma, supplemented by honey and woody notes, resulting in a richer aroma profile, a delicate and full-bodied smoke, and a comfortable aftertaste. Tobacco leaves fermented with plum blossoms effectively enhanced the honey and floral aromas of the tobacco leaves.

[0074] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. Furthermore, various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the spirit of the present invention, they should also be considered as the content disclosed in the present invention.

Claims

1. A method for fermenting floral-scented cigars based on seasonal changes, characterized in that, The following steps are involved: Step S1, Flower pretreatment: Choose sunny, windless days to pick fresh flowers that are free from pests and diseases and are in full bloom. Pick camellias from January to March each year, gardenias from April to June, osmanthus from July to September, and plum blossoms from October to December. After picking, lay the flowers flat in a cool, ventilated place to air dry naturally. The ambient temperature for air drying is 10-15℃ for camellias and plum blossoms, and 20-25℃ for gardenias and osmanthus. The flowers are laid out in a single layer and turned regularly. Camellias and plum blossoms are turned every 2-3 hours, while gardenias and osmanthus are turned every 0.5-1 hour. The flowers were collected and bagged after their moisture content dropped to a suitable range. The moisture content range for camellias and plum blossoms was 18-20%, while that for gardenias and osmanthus was 16-18%. Step S2, Primary Fermentation of Tobacco Leaves: Place the rehydrated tobacco leaves in a fermentation room for primary fermentation; Step S3, secondary fermentation of tobacco leaves: The flowers treated in step S1 and the tobacco leaves that have undergone primary fermentation in step S2 are evenly spread in a certain weight ratio and then placed in a fermentation room for secondary fermentation. Step S4, flower enhancement: Remove the flowers from the tobacco leaves after the second fermentation in step S3, re-weigh the flowers after the treatment in step S1, and weigh them again to the same weight as in step S3. Then, spread the tobacco leaves after removing the flowers and the re-weighed flowers evenly in the same way as in step S3, and place them in the same fermentation room as in step S3 to continue the second fermentation. Repeat the flower enhancement operation in step S4 until the fermentation is completed. Step S5, Natural Aging: The tobacco leaves that have finished fermentation in step S4 are subjected to moisture balancing and then natural aging.

2. The method for fermenting floral-scented cigars based on seasonal changes as described in claim 1, characterized in that, In step S2, the moisture content of the eggplant wrapper tobacco leaves after rehydration is 20-22%, the ambient temperature and humidity of the fermentation room are 30-35℃ and 70-75%, and the fermentation cycle is 1-2 days; the moisture content of the eggplant binder tobacco leaves after rehydration is 22-25%, the ambient temperature and humidity of the fermentation room are 35-40℃ and 75-80%, and the fermentation cycle is 7-9 days; the moisture content of the eggplant core tobacco leaves after rehydration is 25-27%, the ambient temperature and humidity of the fermentation room are 40-45℃ and 80-85%, and the fermentation cycle is 15-20 days.

3. The method for fermenting floral-scented cigars based on seasonal changes as described in claim 1, characterized in that, In step S3, 0.1-0.2 kg of flowers are added to every 1 kg of eggplant wrapper tobacco leaves, 0.2-0.3 kg of flowers are added to every 1 kg of eggplant binder tobacco leaves, and 0.3-0.4 kg of flowers are added to every 1 kg of eggplant core tobacco leaves. The leaves are evenly spread in a layer-by-layer manner. The temperature and humidity of the fermentation room are 30-35℃ and 70-75%, and the fermentation cycle is 12-18 hours.

4. The method for fermenting floral-scented cigars based on seasonal changes as described in claim 1, characterized in that, In step S4, the outer layer tobacco leaves are patterned 2-4 times, the inner layer tobacco leaves are patterned 5-7 times, and the core tobacco leaves are patterned 8-10 times.

5. The method for fermenting floral-scented cigars based on seasonal changes as described in claim 1, characterized in that, In step S5, the moisture content of the tobacco leaves after moisture balance is 17±1%, the aging time of the wrapper is 7 days, the aging time of the binder tobacco leaves is 30 days, the aging time of the core tobacco leaves is 60 days, and the ambient temperature and humidity for tobacco leaf aging is 23±2℃ and 60-65%.

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