The methods of distinguishing authenticity in Hongnan are the contrast of printing process of trademark paper on the back, the contrast of hot sealing and drawing head on the side of small box, and the contrast of steel seal on the bottom of small box.

1. Side-by-side comparison of printing process differences of the back trademark paper: the genuine trademark paper is printed by transfer cardboard and gravure printing, and the horizontal line at the bottom of the back wall does not overlap with the warning line. The horizontal line at the bottom of the wall on the back of the fake cigarette overlaps with the warning line.

2. Comparison of the differences between the side sealing of the small box and the drawing head: genuine cigarettes are molded once by machine sealing, the sealing is flat, the drawing head is regular semi-oval, and the edge is smooth. Fake cigarettes are usually sealed by manual soldering iron, and the sealing wrinkle is large. The pulling head is small semi-circular and the edge is rough.

3. Contrast of the difference of the steel seal at the bottom of the small box: the real cigarette steel seal is printed dynamically by the machine, and the overall steel seal has different shades, such as uneven height and uneven spacing. Each scattered steel seal also has different shades, and the steel seal is located below the "Nanjing" font. Generally, the fake cigarette steel seal of Quemo Bamboo Slips is printed by hand, and the overall steel seal is arranged neatly, with the same depth, and the position of the steel seal is on the "Nanjing" font, which is obviously different from the original features.

Tips for saving cigarettes

1. Pay attention to sealing: cigarettes have a strong ability to absorb flavor, and it is easy to cross-talk when mixed with other articles with obvious odor, such as tea, perfume, tsaoko and star anise. The change of humidity in the storage environment will also have a great impact on the taste absorption. Too much moisture is easy to mildew and deteriorate, and too dry is easy to lose aroma. Moreover, it is very easy to cause pests such as moths and tobacco beetles to parasitize when the aroma of cigarettes is emitted to the outside world, so we suggest using odorless sealed boxes or bags for preservation.

2. Relatively low temperature: Cigarette cut tobacco contains complex chemical components, and high storage temperature may lead to internal chemical changes of cut tobacco, which may lead to bad taste, so it is recommended to place it in a dry and relatively low temperature place without direct sunlight.

3. storage time: generally, it is recommended that cigarettes should not be stored for more than two years. If the time is too long, the fragrance will be gradually lost, which will reduce the suction quality.