2. Flammability identification. True smoke has good combustibility and does not turn off the flame; Fake cigarettes have poor combustibility and flameout.
3. Identification of soot. In combustion observation, whether there are more tobacco stems mixed in the cut tobacco, when there are more tobacco stems, the cigarette may be fake.
4. Identification of fragrance and odor. All brands of cut tobacco of real cigarettes generally meet their corresponding grade standards, and the cut tobacco of real cigarettes has the fragrance of opening packages and smells very comfortable; The smell of fake cigarettes is pungent and the smell of nose is obviously uncomfortable.
Extended data:
Identification of cigarettes should master the following elements:
1. Appearance: the packaging of real cigarettes is square, flat and tidy; The packaging of fake cigarettes is not standardized and the taste is rough. BOPP is generally used as transparent paper for real cigarettes, which is characterized by good surface gloss, low friction coefficient, high transparency, toughness, crisp sound, firm and tidy after packaging, and no wrinkles that cannot be stretched; The transparent paper used for fake cigarettes is generally thick, dull and has poor transparency. Loose after packaging, the surface is not clean.
2. Printing: The printing technologies of cigarette trademark paper mainly include gravure printing, offset printing, screen printing and flexographic printing. At present, gravure printing and offset printing are the two most widely used printing methods in cigarette trademark making. The biggest difference between gravure printing and offset printing is that offset printing does not need dots, so its edge is smooth; Gravure printing must have a mesh anyway, so the outline edge of real text is jagged.
In addition, the printed color of real cigarettes is pure, uniform, complete and shiny, and the printed words are clear, the edges are complete, the color registration is uniform, and there is no missing plate phenomenon; The printing color of fake cigarettes is cloudy and dim, the phenomenon of lack of plates is serious, the handwriting printing is rough and the edges are blurred.
People's network -6 tricks to teach you to identify fake cigarettes.
Baidu encyclopedia-cigarettes