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GB/T 18771.4-2015 English PDF

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GB/T 18771.4-2015: Tobacco vocabulary -- Part 4: Quality evaluation and testing
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GB/T 18771.4: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 18771.4-2015	English	679	Add to Cart	6 days [Need to translate]	Tobacco vocabulary -- Part 4: Quality evaluation and testing	Valid	GB/T 18771.4-2015
GB/T 18771.4-2002	English	879	Add to Cart	6 days [Need to translate]	Tobacco vocabulary -- Part 4: Quality evaluation and testing	Obsolete	GB/T 18771.4-2002

PDF similar to GB/T 18771.4-2015

Standard similar to GB/T 18771.4-2015

GB/T 22838.2 GB 5606.5 GB 5606.4 GB/T 18771.3 GB/T 18771.5 GB/T 18771.2

Basic data

Standard ID	GB/T 18771.4-2015 (GB/T18771.4-2015)
Description (Translated English)	Tobacco vocabulary -- Part 4: Quality evaluation and testing
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	X87
Classification of International Standard	65.160
Word Count Estimation	32,366
Date of Issue	2015-07-03
Date of Implementation	2015-11-02
Older Standard (superseded by this standard)	GB/T 18771.4-2002
Regulation (derived from)	National Standard Announcement 2015 No.22
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This Standard specifies the tobacco, tobacco products, tobacco processing and material quality evaluation and testing of commonly used terms. This Standard applies to the tobacco industry, scientific research, testing, production, operation, management, education and training and other activities.

GB/T 18771.4-2015: Tobacco vocabulary -- Part 4: Quality evaluation and testing

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Tobacco vocabulary. Part 4. Quality evaluation and testing ICS 65.160 X87 National Standards of People's Republic of China Replaces GB/T 18771.4-2002 Tobacco terminology part 4. quality evaluation and testing Published on.2015-07-03 2015-11-02 Implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Published by China National Standardization Administration

Foreword III 1 Scope 1 2 Environment 1 3 Sampling 1 4 Quality Evaluation 3 5 Smoking Machines 16 References 19 Index 20

Foreword

GB/T 18771 Tobacco Terminology is divided into the following 5 parts. --- Part 1. Tobacco type and tobacco production; --- Part 2. Tobacco products and tobacco processing; --- Part 3. Tobacco materials; --- Part 4. Quality evaluation and testing; --- Part 5. Tobacco machinery and tobacco-specific testing equipment. This part is Part 4 of GB/T 18771. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section replaces GB/T 18771.4-2002 "Tobacco Terminology Part 4. Quality Evaluation and Testing". This section is related to Compared with GB/T 18771.4-2002, in addition to editorial changes, the main technical changes are as follows. --- Amended the standard name, some terms and their definitions; --- Added some new terms related to the evaluation and testing of tobacco and tobacco product quality in recent years; --- Removed part of tobacco-specific testing equipment; --- Removed some infrequently used terms, such as "stamp quality" and "surface purity of cigarettes"; --- Deleted some terms in ISO 10185..1993 that were not included in ISO 10185..2004; --- Not completely using ISO 10185..2004 standard. This section is proposed by the State Tobacco Monopoly Administration. This section is under the jurisdiction of the National Tobacco Standardization Technical Committee (SAC/TC144). This section was drafted. China Tobacco Science and Technology Information Center, China Tobacco Standardization Research Center, Nantong Acetate Fiber Co., Ltd. The main drafters of this section. Zheng Xinzhang, Zheng Lu, Feng Qian, Cao Jianhua, Yuan Hong, Zhang Shihua, and Liu Yali. The previous releases of this section are. --- GB/T 18771.4-2002. Tobacco terminology part 4. quality evaluation and testing

1 Scope

This part of GB/T 18771 specifies common terms for tobacco, tobacco products, processing technology and quality evaluation and testing of tobacco materials. This section applies to scientific research, testing, production, operation, management, education and training activities in the tobacco industry.

2 Environment

2.1 Atmosphere Environmental conditions are determined by one or more of the following parameters. ---temperature; ---Relative humidity; ---pressure. Note. This term applies only to the fields of scientific research and testing in the tobacco industry. [GB/T 16447-2004, definition 2.1] 2.2 Conditioningatmosphere Store the atmosphere (2.1) of the sample (3.4) or sample (3.14) before the test. Note 1. The adjustment of the atmosphere is determined by one or more of the three parameters. temperature, relative humidity and pressure.The values of these parameters are within a given time. The change should be kept within the specified tolerance range. Note 2. The term "conditioning" refers to the placement of the test specimen (3.4) or test specimen (3.14) in a Under specified conditions, it is allowed to remain in the atmosphere for a given period of time. Note 3. Adjustment can be carried out in a laboratory, a special sealed test box or an adjustment box. Note 4. The parameter values and time period of the atmospheric environment to be adjusted and tested depend on the nature of the sample (3.4) or sample (3.14) being tested. Note 5. Rewrite GB/T 16447-2004 definition 2.2. 2.3 Test atmosphere testatmosphere The atmosphere (2.1) to which the sample (3.4) or sample (3.14) was exposed during the test. Note 1. The test atmosphere is determined by one or more of the three parameters. temperature, relative humidity and pressure.The values of these parameters are within a given time. The change should be kept within the specified tolerance range. Note 2. The test can be carried out in a laboratory, a special closed test box or an adjustment box. Which method is selected depends on the properties of the sample (3.4) or sample (3.14). Quality and test itself. If the characteristics of the sample (3.4) or sample (3.14) change little during the test, there is no need to strictly control the test atmosphere. Note 3. Rewrite GB/T 16447-2004 definition 2.3.

3 Sampling

3.1 Lot According to the purpose of sampling, a certain amount of a certain product is composed under substantially the same conditions. Note 1. The "batch" in this section refers to the batch submitted for inspection, which can consist of several production batches or part of a production batch. Note 2. For raw tobacco, it means that it must be produced under the conditions that one or more characteristics (such as tobacco leaf position, color, maturity, tobacco length, etc.) are considered to be consistent The amount of tobacco. The general meaning of the concept is. the tobacco leaves in the batch belong to the same variety and are produced by the same origin. Note 3. Tobacco products such as cigarettes refer to unit products that have been assembled for inspection submission. Note 4. Rewrite ISO 10.185..2004 definition 1.7.1 and GB/T 2828.1-2012 definition 3.1.13. 3.2 Sample unit increment A product that can be described individually. For example. a tangible entity, a certain amount of material, or a combination thereof. Note 1. For raw tobacco refers to a certain amount of tobacco drawn from the same sampling unit (3.7) at the same time, forming part of a single sample (3.9). Note 2. For cigarettes, the unit sample taken from the lot (3.1) for inspection. Note 3. Rewrite GB/T 2828.1-2012 definition 3.1.4. 3.3 Laboratory sample Samples for laboratory inspection or testing. Note. Applies to raw tobacco and cigarettes. 3.4 Test sample A sample randomly selected from a laboratory sample (3.3) for testing or analysis. Note. Applies to raw tobacco and cigarettes. 3.5 Acceptance inspection Inspections to determine whether the quality of each batch (3.1) submitted for inspection is in compliance with the specified requirements. 3.6 Delivery of goods A certain amount of tobacco delivered at the same time. Note. The delivered goods can be one batch (3.1) or several batches (3.1) of tobacco leaves, or some sections of tobacco leaves (3.1). [ISO 10185..2004, definition 1.7.4] 3.7 Sampling unit Delivery of a unit in the goods (3.6). Note 1. It is packaged separately as a cigarette pack, cigarette case, etc. Note 2. For tobacco in bulk, deliveries with a total mass of m kg should be considered to consist of m/100 sampling units. Note 3. The definition of the term "sampling unit" in this standard is a special interpretation of the general definition given in ISO 3534-2, which applies only to raw tobacco. [ISO 10185..2004, definition 1.7.2] 3.8 Stratified sampling First divide the sampling population into several different levels (or sub-populations) according to certain characteristics, and then proceed from each layer according to the specified ratio Random sampling (3.12) was used to form a sample. [ISO 10185..2004, definition 1.6.8] 3.9 Single sample Basic sample A sample of N sample units (3.2) taken from the unit to represent the sampling unit (3.7) as closely as possible. [ISO 10185..2004, definition 1.6.1] 3.10 Grosssample Sum of all single samples (3.9). [ISO 10185..2004, definition 1.6.2] 3.11 Reduced sample A sample taken from the master sample (3.10) and used to represent the master sample (3.10). [ISO 10185..2004, definition 1.6.4] 3.12 Random sampling At each sampling, all units in the batch (3.1) have the same probability of being sampled. [GB/T 5606.1-2004, definition 2.2] 3.13 Sampling point Where to take the sample unit (3.2). [GB/T 5606.1-2004, definition 2.7] 3.14 Testportion A certain number of samples taken for inspection or observation (3.4). [GB/T 5606.1-2004, definition 2.10] 3.15 Type inspection Comprehensive inspection of various indicators specified in the product standard to assess whether the product quality fully meets the standard or meets design requirements. Note. Rewrite GB/T 5606.1-2004 definition 2.11. 3.16 Supervision inspection The product quality inspection agency shall be organized by the government quality supervision department in accordance with the law, and the product quality shall be tested and inspected in accordance with the standards set by the state. Test and judge. [GB/T 5606.1-2004, definition 2.13]

4 Quality Evaluation

4.1 Tobacco 4.1.1 Tobacco stalk percentage percentageofstemintobaccoleaf The mass of leaf veins with a diameter exceeding a certain range in the tobacco leaf sample as a percentage of the total mass of the tobacco leaf sample. 4.1.2 Tobacco moisture content percentageofmoistureintobaccoleaf The moisture content of the tobacco leaf sample as a percentage of the total mass of the tobacco leaf sample. 4.1.3 Sandy rate percentageofsandintobaccoleaf The mass of sand contained in the tobacco leaf sample as a percentage of the total mass of the tobacco leaf sample. 4.1.4 Tobacco leaf smoulder performanceoftobaccoleaf Tobacco leaf burning performance in the absence of open flame. Note. The smoldering properties of tobacco leaves include the smoldering holding power of tobacco leaves (4.1.5), the smoldering rate of tobacco leaves (4.1.6), and the uniformity of smoldering tobacco leaves (4.1.7). 4.1.5 Tobacco leaf smoldering holding powerabilityoftobaccoleafmaintainingsmoulder Under specified experimental conditions, the ability of the leaves of tobacco leaves to remain open flame-free. 4.1.6 Tobacco leaf smoldering rate How fast the tobacco leaves burn in the absence of open flame under specified experimental conditions. 4.1.7 Smoulderinguniformityoftobaccoleaf Under the prescribed experimental conditions, when the leaves of the tobacco leaves burned in the absence of an open flame, the burning rate of each part of the combustion zone was consistent. 4.1.8 Smouldering time Under the specified experimental conditions, the tobacco leaf was ignited, the time from the time the flame was blown out to the time when the last Mars of the leaf went out time. 4.1.9 Flame-out tobacco leaf self-extinguishingtobaccoleaf Under the specified experimental conditions, the smoldering time (4.1.8) is less than a certain period of time. 4.2 Tobacco products 4.2.1 Short looseends A certain area and depth of cavity formed by the end of a cigarette or cigar because the tobacco is not filled. 4.2.2 Openseam Twist the cracks at the ends of the cigarette or filter rod in a certain way. 4.2.3 (Cigarette) self-extinguishing The smoldering phenomenon ceases after the cigarette is ignited. 4.2.4 Ashholdingcapability After the cigarette or cigar is ignited, the soot on the burning cone does not fall off within a certain period of time. 4.2.5 Air leak There is a gap in filter cigarettes at the overlap of the tipping paper. When the cigarette is burned, the ambient air enters the cigarette from the gap. 4.2.6 Cigarette moisture content percentageofmoistureincigarette The percentage of the moisture content in the tobacco shreds in the cigarette sticks to the total mass of the tobacco shreds. 4.2.7 Drawresistance The pressure difference between the two ends of the cigarette when it is smoked. Note 1. The method of measuring the suction resistance is to seal the cigarette in a measuring device, and insert the output end (4.2.13) into a depth of 9mm. Under the standard conditions of GB/T 16447 The negative pressure applied to the input end (4.2.12) was maintained at the output end (4.2.13) at a flow rate of 17.5 mL/s. Note 2. All ventilation areas and cigarettes should be exposed to the atmosphere. Note 3. The measurement results are expressed in Pascal. The value expressed in mmH2O can be converted into Pascals using 1mmH2O = 9.80665Pa. Note 4. Sometimes the suction resistance can also be given by the subjective judgment of the cigarette when it is being smoked by the consumer or the smoking group. In this case, due to non-compliance with the formal definition The suction resistance is not measured objectively. Note 5. Rewrite GB/T 22838.5-2009 definition 3.2. 4.2.8 Hardness In a certain atmospheric (2.1) environment, the cigarette rod or filter rod is resistant to deformation in the radial direction. With a certain area of the probe, a certain pressure, apply After adding to the cigarette for a certain time, it is expressed by the percentage of the length in the diameter direction and the original diameter. Note. Rewrite definition 3.2 of GB 5606.3-2005 and definition 3.3 of GB/T 5605-2011. 4.2.9 Side tribal silk contentoflossofcuttobaccofromtheends Under certain conditions, a certain number of cigarette samples fall from the end during the process of turning or vibration, etc., and the exposed end of the cigarette The ratio of the number. Note. According to GB/T 22838.16-2009 and GB/T 22838.17-2009. 4.2.10 Tobacco containing percentage ofdustincuttobacco The mass of a certain amount of tobacco in the cut tobacco is the percentage of the cut tobacco mass. 4.2.11 Total airflow When the cigarette is placed in the test device at the insertion depth specified in ISO 3308, the total gas flow from the butt end. Note. Under standard conditions, the total air flow Q = 17.5mL/s. [GB/T 22838.15-2009, definition 3.3] 4.2.12 Inputend The end of a cigarette or cigar to be lit. Note. Rewrite ISO 10185..2004 definition 1.3.2.1.1. 4.2.13 Outputend Opposite the input (4.2.12). [ISO 10185..2004, definition 1.3.2.1.2] 4.2.14 Ventilation airflow The amount of air that is not ignited by the cigarette through the wrapper. Note. When the cigarette is placed in the test device at the insertion depth specified in ISO 3308, the cigarette filter end is caused by the airflow through the cigarette due to the effect of the cigarette's suction resistance. Under negative pressure. [GB/T 22838.15-2009, definition 3.5] 4.2.15 Ventilation rate degreeofventilation Ventilation volume (4.2.14) as a percentage of total air flow (4.2.11). [GB/T 22838.15-2009, definition 3.7] 4.2.16 Total ventilation When a cigarette is placed in a test device at the insertion depth specified in ISO 3308, air is drawn from all of its wrappers. [GB/T 22838.15-2009, definition 3.6] 4.2.17 Paper ventilation Air inhaled from cigarette paper (including areas overlapping with tipping paper). [GB/T 22838.15-2009, definition 3.10] 4.2.18 Cigarette-paperventilation Air inhaled from cigarette paper (excluding areas overlapping with tipping paper). [GB/T 22838.15-2009, definition 3.14] 4.2.19 Filter tipping-paperventilation Air inhaled from the end of the cigarette butt to the tip of tipping paper and cigarette paper. [GB/T 22838.15-2009, definition 3.13] 4.2.20 Filter ventilation Air sucked from the end of the cigarette butt to the point where the cigarette and the filter meet. [GB/T 22838.15-2009, definition 3.9] 4.2.21 Cigarette buttentilation Air inhaled from the end of the cigarette butt to the sign of the cigarette butt. [GB/T 22838.15-2009, definition 3.11] 4.2.22 Cigarette burning section ventilation burnabletobaccorodventilation Air inhaled from the cigarette butt mark to the cigarette input (4.2.12). [GB/T 22838.15-2009, definition 3.12] 4.2.23 Hot collapse The radial collapse during cigarette burning. 4.2.24 Monitor cigarette monitortestpiece Cigarettes obtained from a batch of cigarette products produced under particularly stringent and controlled production conditions. Note 1. This batch of cigarettes showed the greatest possible consistency in terms of their physical and chemical properties and smoke characteristics (4.2.32). Note 2. Revised according to 3.10 of ISO 4387..2000. [ISO 10185..2004, definition 1.1.5] 4.2.25 (Cigar) graying degree Comprehensive performance of cigar burning and smoking (4.2.26), gray matter (4.2.28) and solid gray (4.2.27) degree. [GB 15269.4-2011, definition 3.13] 4.2.26 (Cigar) burning uniformity When the cigar is burning or smoldering, the height of the burning circle of the cigarette is different. [GB 15269.4-2011, definition 3.14] 4.2.27 (Cigar) ashcoherence During the smoking process of cigars, the ashes of the tobacco jacket and the jacket are attached to the tightness of the burning cone. [GB 15269.4-2011, definition 3.15] 4.2.28 (Cigar) ash quality The comprehensive degree of soot gray and soot fineness during cigar burning. [GB 15269.4-2011, definition 3.16] 4.2.29 (Cigar) hole Holes in cigar jackets with a diameter of more than 2mm. [GB 15269.3-2011, definition 3.1] 4.2.30 (Cigar) peeling off-wrapper The flaming or peeling of cigar coats. Note. Rewrite GB 15269.3-2011 definition 3.2. 4.2.31 (Cigar) splitting The phenomenon that the cigar coat breaks more than 5mm. Note. Rewrite GB 15269.3-2011 definition 3.3. 4.2.32 Smoke An aerosol formed when a cigarette is burned. 4.2.33 Mainstream smoke All smoke escaping from the end of the cigarette butt during aspiration (4.2.32). [ISO 10185..2004, definition 1.2.4] 4.2.34 Sidestreamsmoke All smoke (4.2.32) except for the smoke (4.2.32) escaping from the end of the cigarette butt during smoking. [ISO 10185..2004, definition 1.2.5] 4.2.35 Smoulderstreamsmoke All smoke escaping from the end of the cigarette butt during the continuous suction interval (4.2.32). [ISO 10185..2004, definition 1.2.6] 4.2.36 Vapourphase The portion of smoke after passing through the particulate trap during the smoking process of cigarettes in accordance with ISO 4387 (4.2.32). [ISO 10185..2004, definition 1.2.7] 4.2.37 Total particulate matter Crude smoke condensate The mainstream smoke (4.2.33) part captured in the smoke trap (5.7). [GB/T 19609-2004, definition 3.1] 4.2.38 Dry granular phase dryparticulatematter; DPM Dry flue gas condensate Total particulate matter after removal of water (4.2.37). [GB/T 19609-2004, definition 3.2] 4.2.39 Nicotine dry particulate phase (or tar) nicotine-freedryparticulatematter; NFDPM Nicotine-freedrysmokecondensate Total particulate matter after removal of nicotine and moisture (4.2.37). [GB/T 19609-2004, definition 3.3] 4.2.40 Cigarette vapourphaseofcigarettesidestream Part of the sidestream smoke (4.2.34) after passing through the particulate matter trap under the conditions specified in the standard. [YC/T 349-2010, definition 3.1] 4.2.41 Total particulate matter Sidestream flue gas (4.2.34) Initial condensate, captured on the sidestream smoke trap and sidestream smoke condensed on the inner wall of the fishtail hood (4.2.34) section. [YC/T 185-2004, definition 3.1] 4.2.42 Sidestream smoke tar nicotine-freedrysidestreamparticulatematter Sidestream flue gas (4.2.34) de-nicotine dry particulate phase (4.2.39), dry sidestream flue gas condensate without nicotine, that is, captured in sidestream The total particulate matter (4.2.37) on the trap minus the moisture and nicotine in it, plus the condensation at 8.7 estimated in YC/T 185-2004 Tar on the inner wall of the fishtail hood (4.2.39). [YC/T 185-2004, definition 3.2] 4.2.43 Sidestreamnicotine The sum of nicotine condensed on the inner wall of the fishtail hood, captured on the sidestream smoke trap, and collected in the absorption bottle. [YC/T 185-2004, definition 3.3] 4.2.44 Cigarette filter alkaloid retention rate alkalioidretention indexofacigarettefilter Percentage of alkaloids trapped in cigarette filters versus alkaloids entering the filter. [ISO 10185..2004, definition 1.5.9.1] 4.2.45 Smoke condensate retention rate of cigarette filter smokecondensateretention indexofacigarettefilter Percentage of original flue gas condensate (4.2.37) retained by the cigarette filter and original flue gas condensate (4.2.37) entering the filter. [ISO 10185..2004, definition 1.5.9.2] 4.2.46 Aroma aroma A collective term for the pleasant and comfortable breath inherent in tobacco itself. 4.2.47 Flavour Sum of tobacco and tobacco products (4.2.32) The sum of pleasant, comfortable, and scented smells, tastes, and nerves 4.2.48 Offensivetaste Does not have the unpleasant smell of the essential odor of tobacco. Such as grass gas, miscellaneous gas, essential gas, charred gas, turpentine gas, pollen gas, earthy gas, earth Square miscellaneous gas and sultry breath. 4.2.49 Irritating The sensory discomfort caused by smoke (4.2.32). Such as the sprint on the nasal cavity, mouth, throat, hairy thorns and so on. 4.2.50 Aftertaste After exhaling smoke (4.2.32) from the oral cavity and nasal cavity, the taste sensations left over. 4.2.51 Off-taste It does not have the obvious strange smell of the essential odor of tobacco products. 4.2.52 Mustydour Obvious moldy odor that is not an essential odor of tobacco products. 4.3 Ambient smoke 4.3.1 Ambient air Air contained in a specific indoor or outdoor environment. [GB/T 21135-2007, definition 3.2] 4.3.2 Environmental tobacco smoke environmenttobaccosmoke; ETS A mixture of aging and diluted mainstream smoke (4.2.33) exhaled by the human body and aging and diluted sidestream smoke (4.2.34). [ISO 10185..2004, definition 1.2.8] 4.3.3 Respirable suspended particles; RSP When the particle size selective sampling device is used for the capture, the collection efficiency curve of the aerodynamic diameter of 4.0 μm which meets the median cut point is particle. [GB/T 21133-2007, definition 3.2] 4.3.4 Ultravioletparticulatematter; UVPM Environmental tobacco smoke obtained by comparing the UV absorbance of a sample of respirable suspended particulate matter (4.3.3) with a substitute standard (4.3.5) The estimated value of the contribution of gaseous particulate matter (4.3.7) to respirable suspended particulate matter (4.3.3). [ISO 10185..2004, definition 1.5.6] 4.3.5 Surrogatestandard A chemical whose concentration has a quantitative relationship with a known concentration of environmental tobacco smoke particulate matter (ETS-PM) (4.3.7) solution. [ISO 10185..2004, definition 1.5.6.1] 4.3.6 Fluorescent Particulate Matter; FPM Environmental tobacco smoke obtained by comparing the fluorescence intensity of a sample of respirable suspended particulate matter (4.3.3) with a substitute standard (4.3.5) Particulate matter (4.3.7) is an estimate of the contribution of respirable suspended particulate matter (4.3.3). [ISO 10185..2004, definition 1.5.7] 4.3.7 Environmental tobacco smoke particulate matter environmenttobaccosmokeparticulatematter; ETS-PM Particulate matter in environmental tobacco smoke (4.3.2). [ISO 10185..2004, definition 1.5.8] 4.3.8 Vapour-phasenicotine Nicotine is not bound to the aerosol particulate matter. [ISO 10185..2004, definition 1.5.8.1] 4.3.9 Solanesol articulate matter; Sol-PM Environmental tobacco smoke particulate matter (ETS-PM) (4.3.7) based on the determination of tobacco specific compound solanesol Estimated contribution of particulate matter (RSP) (4.3.3). [ISO 10185..2004, definition 1.5.8.2] 4.4 Processing technology 4.4.1 Cigarette packet retransmission rate steelermeabilityinbaledtobacco After the whole package of tobacco leaves has been subjected to vacuum moisture re-treatment, the temperature or moisture content of the tobacco package has been significantly increased. The percentage of the total mass of the tobacco leaf. 4.4.2 Loosenedratio After the solution process, the mass of the unraveled tobacco leaves as a percentage of the total mass of the sampled tobacco leaves. 4.4.3 Tearing ratio The mass of the sliced tobacco torn off by the leafer from the tobacco leaves is a percentage of the total mass of the sliced tobacco put into the leafer. Note. The total mass of tobacco put into the leaf machine is equal to the total mass of the leaf put into the leaf machine minus the mass of the stem. 4.4.4 Wind fraction The mass of the flakes separated by the wind extension is the percentage of the mass of the free flakes entering the wind extension. Note. Free flakes are flakes that have been torn from the stem. 4.4.5 Stemcontentinlamina Of the sliced tobacco samples separated by the leaf-leaf wind, the tobacco stems with a diameter greater than 1.5 mm on the sliced tobacco and the quality of the stems mixed with the sliced tobacco accounted for the sliced tobacco. Percent of total ...

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