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Other This subheading includes: 1. tobacco extracts and essences as described in the HS Explanatory Note to heading 2403 , first paragraph, (7); 2. tobacco powder (generally obtained by a process of, for example, grinding, resulting in a specific particle size distribution). There should be no impurities and the particle size should be under 0,4 mm; 3. spun, scented and fermented Brazilian tobaccos pressed in skins into a ball shape (Mangotes); ►M19 4. expanded tobacco (cut tobacco leaves or stems, which have been increased in size in a process of cellular expansion); it is not suitable to be smoked on its own and is used as a filler in the production of cut tobacco used in cigarettes (cut filler tobacco – CFT); ◄ 5. products for smoking (for example, ‘water pipe tobacco’), consisting wholly of tobacco substitutes and substances other than tobacco. Scope The scope of the smoking test is to set up a harmonised method to distinguish manufactured tobacco (tobacco ready for smoking without any further processing) of heading 2403 from unmanufactured tobacco of heading 2401 . In order to make a distinction between manufactured tobacco of heading 2403 and unmanufactured tobacco of heading 2401 , a smoking test shall be performed. The sieving test shall only be performed in the event that it is not be possible to smoke the sample without further (industrial) processing. Introduction For the purpose of subheading 2403 19 the expression ‘suitable for smoking’ means that the product could be rolled or filled in the cigarette form and burned with several puffs, or could be filled into the pipe and burned with several puffs). Principle of the test Whether it is possible to smoke a tobacco sample is assessed in several ways: by rolling with a cigarette paper to prepare a ‘roll your own’ (RYO) cigarette and filling into the cigarette tube (CTF) or filling the tobacco into a pipe. Pipe and prepared cigarettes are lit and smoked. The ignition and smoking are evaluated. Field of application The test is applicable for any tobacco or tobacco products including parts of tobacco products such as cigar filler. The test can be hazardous when the sample is contaminated (affected) by mould. Equipment Temperature and humidity control box for sample conditioning (temperature 22 ± 1 °C and humidity 60 ± 3 %) Cigarette tube filler Cigarette papers (length 70 mm, width 37 mm) Cigarette tubes (diameter 7.3 mm, length 85 mm including the filter) Lighter Brush for cleaning of cigarette tube filler Pipe Pipe tamper Tools for pipe cleaning Smoking machine (ISO 3308 compliant) Sample preparation The sample is thoroughly mixed and if necessary sub-sampled by coning and quartering. When the sample is dry (water content is less than 8 % by mass), it should be conditioned (temperature 22 ± 1 °C and humidity 60 ± 3 %) for at least 48 hours. The sample is not allowed to be cut in any way, broken, crushed, ground or otherwise split. Test procedure Clean the cigarette tube filler and the pipe. Pipe: Cigarettes: Test evaluation (typical examples) If one of the smoking tests is positive, the tobacco can be smoked (subheading 2403 19 ). Pipe smoking test evaluation RYO cigarette smoking test evaluation CTF cigarette smoking test evaluation Final evaluation Remark It is not possible to fill the sample into the pipe (whole tobacco leaves, large pieces of tobacco leaves, stems, etc.) It is not possible to roll the cigarette (whole tobacco leaves, large pieces of tobacco leaves, stems, etc.) It is not possible to prepare the cigarette (whole tobacco leaves, large pieces of tobacco leaves, stems, etc.) It is not possible to smoke the sample without further (industrial) processing Typical for subheadings 2401 10 , 2401 20 , 2401 30 It is not possible to smoke the sample in the pipe (the stuffing shows no or very low permeability and pipe goes out almost immediately after ignition) It is not possible to roll the sample into the cigarette, sample does not contain tobacco fibres which maintains the roll (keep together), filling is falling out from the cigarette paper The sample was filled into the cigarette tube and the prepared cigarette was smoked The sample is suitable (capable) for smoking Typical for tobacco refuse (small lamina particles) – subheadings 2403 19 It is possible to smoke the sample in the pipe The sample was rolled into the cigarette paper and the prepared cigarette was smoked The sample was filled into the cigarette tube and the prepared cigarette was smoked The sample is suitable (capable) for smoking Typical for cut tobacco – subheading 2403 19 It is not possible to smoke the sample in the pipe (the stuffing is burned very quickly and great amount of heat is released - the pipe could be damaged) Sample was rolled into the cigarette paper and the prepared cigarette was smoked The sample was filled into the cigarette tube and the prepared cigarette was smoked The sample is suitable (capable) for smoking Typical for fine cut tobacco - subheading 2403 19 It is not possible to fill the sample into the pipe (the sample particles are very hard) It is not possible to roll the cigarette (hard particles rip the cigarette paper) It is not possible to fill the cigarette tube (hard particles rip the cigarette paper) It is not possible to smoke the sample without further (industrial) processing Typical for cut stems – subheading 2401 30 For some samples (especially tobacco refuse) it is possible to roll almost shapeless ‘rolls’. If such ‘rolls’ crumble away before lighting or the ‘tobacco particles’ fall out from the lit ‘rolls’ after the first puff, the result is then noted as follows: ‘it is not possible to roll the cigarette’. Literature ISO 3402 Tobacco and tobacco products - Atmosphere for conditioning and testing. In order to make a distinction between manufactured tobacco of heading 2403 and unmanufactured tobacco of heading 2401 , a smoking test shall be performed. The sieving test shall only be performed in the event it shall not be possible to smoke the sample without further (industrial) processing. Principle of the method The method is based on determination of mass fractions of the sample remaining on sieves with different mesh size to distinguish between products classified under subheading 2401 20 and products classified under subheading 2401 30 . If 50 % by mass or more of the particles in sample are larger than 3.15 mm (c.f. CORESTA method no 16), the sample is partly or wholly stemmed/stripped tobacco (subheading 2401 20 ). If more than 50 % by mass of the particles is smaller than 3.15 mm (in one of all three dimensions), the sample is tobacco refuse (subheading 2401 30 ). Applicability The results can be affected by physicochemical properties of the sample and several other factors: Equipment Temperature and humidity control box for sample conditioning (temperature (22 ± 1 °C) and humidity (60 ± 3 %)). Analytical balances - accuracy min. 0.01 g Set of circular sieves of specifications according to ISO 3310-1 (metal wire cloth - square aperture), sieve diameter 200 mm, sieve high 50 mm and aperture diameters as follows 0.4 mm; 3.15 mm and 6.3 mm Ultrasonic bath for cleaning of the sieves Vibration sieve separator able to produce vibration at 50 Hz and of amplitude 3 mm Bottom and cover for the set of sieves Brush for removing the sample particles from sieves Sample preparation The sample is thoroughly mixed and if necessary sub-sampled by coning and quartering and divided into two test portions. The sample is weighed (from 50 g to 150 g) and then conditioned at a temperature of 22 ± 1 °C and a humidity of 60 ± 3 % for at least 48 hours. After that all work with the sample should be performed in the controlled atmosphere with a temperature of 22 ± 1 °C and a humidity of 60 ± 5 %. Testing temperature and humidity should be measured and included in the test report. Also the atmospheric pressure should be measured and included into the test report when the atmospheric pressure is outside the range 86 kPa – 106 kPa. Method Sieves should be clean and undamaged. Every sieve is weighed precisely (0.01 g). Sieves are composed bottom up as follows - bottom (retention container for dust collection), sieve with the smallest aperture diameter, other sieves by ascending aperture diameter and cover. The conditioned sample is weighed with absolute precision of 0.01 g and evenly spread on the upper sieve which is then closed with the cover. The set of sieves is placed into the vibration sieve separator and subjected to vibrations at 50 Hz with an amplitude of 3 mm for 5 to 15 minutes (according to the sample weight). When the sieving is finished the set of sieves is removed from the separator. Then the cover of the sieve and upper sieve is removed. Dust particles stuck to the sides of the upper sieve are brushed into the sieve and then by five strokes by hand to the sieve these particles are forced to fall through into the sieve underneath (sieve with the smaller aperture diameter). This dust is removed gradually from all sieves. Each sieve with the sample particles is weighed precisely (0.01 g) as well as the bottom with the dust. The test is performed in parallel but with another portion of the test sample. Calculations The results are calculated as sample mass fraction (residue) remaining on the particular sieve. For each sieve the sample mass fraction Z X is calculated according to the formula: in % by mass, where m R is weight (in g) of the particular sieve with the residue, m X is weight (in g) of the particular sieve and m S is the sample weight (in g). The sieving recovery Y s is calculated according to the formula: in %, where m R is weight (in g) of the particular sieve with the residue, m X is weight (in g) of the particular sieve and m S is the sample weight (in g). Evaluation and expression of results The sieving recovery should be higher than 99 %. If not, the whole test should be repeated with another sample portion. The sample conditioning is checked according to ISO 3402. The results are expressed as sample mass fraction (residue on the particular sieves) in % by mass rounded to one decimal. The test report should include also the sieve aperture diameters, time of sieving, vibration amplitude and frequency, sample weight, temperature and humidity of testing atmosphere. Metrological parameters Limit of quantification is 5 % by mass. Repeatability limit is 1.5 % by mass for sample mass fraction between 5 and 20 % by mass. For sample mass fraction higher than 20 % by mass is the repeatability limit r = 0.06 x Zx. Measurement uncertainty is 2 % by mass for sample mass fraction between 5 and 20 % by mass. For sample mass fraction higher than 20 % by mass is the measurement uncertainty U = 0,1 x Zx. Literature CORESTA Recommended Method No 16: Lamina strip particle size determination ISO 2395 Test sieves and test sieving – Vocabulary. ISO 3310-1 Test sieves - Technical requirements and testing – Part 1: Test sieves of metal wire cloth. ISO 3402 Tobacco and tobacco products - Atmosphere for conditioning and testing. Flotation is intended to separate the rich element of a mineral substance from the gangue by enabling it to collect at the surface of the water in which it has been immersed, while the gangue deposits at the bottom. 2501 00 Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea water