At present, there are two ways to identify stamps:
First of all, the comparison method is to compare the identified stamps with the real tickets. Such as patterns, characters, colors, ink, paper, perforations, glue, etc. It's perfect. It's a real ticket.
Second, technical analysis (probably the most scientific method): technical inspection and testing of printing methods, paper, ink, adhesives, steganography, etc. Confirmed stamps. There are many technical analysis methods. If the identified stamp is printed on watermark paper, the watermark can be observed and recognized by watermark discriminator. In order to identify whether the paper and ink used are the same as the real ticket, some countries use chemical methods to analyze the paper and ink. Through these methods, the authenticity of stamps can be determined.
According to the report of the crime of forging stamps exposed separately in newspapers and periodicals, the characteristics of several fake New China stamps appearing in the postal market and endangering many philatelists are introduced as follows:
(1) Popular Zodiac Stamps
Needless to say, the most forged one is T 46 "monkey ticket". Because the price of "monkey tickets" has risen the fastest, fake "monkey tickets" have continued in recent years. "Monkey ticket" is a genuine product, which is a combination of engraving, writing and printing, and the back is coated with glue. The fakes on the market are all reproduced on the photo page. The difference between genuine and genuine products is that, first, the real monkey hair has a three-dimensional effect, and the fine lines on the picture are clear, while the fake monkey ticket is printed in a photo version, and the monkey hair can't distinguish the fine lines and the level is unclear; Second, the genuine color is deep red, while the pink and orange of fake tickets are deep and shiny; Third, the monkey's eyes are bright in kind, while the teeth holes of fake tickets are uneven; Fifth, the fake ticket has no adhesive, and there is a hidden bar in the lower right corner of the ticket face (this is printed on printed matter according to relevant state regulations). If you carefully compare these differences when buying a monkey ticket, you can identify its "true face".
(2) Popular sheetlets
The most typical is the forgery of J4 1M and J42M stamp sheetlets. Because these two sheetlets are two of the "four pillars" and the patterns are the same as T37M and T38M, it provides the conditions for criminals to forge.
The main characteristics of distinguishing between true and false J 4 1M and J 42M are as follows: 1. Distinguishing the characteristics of characters and strokes. J 4 1M genuine "Joe", the upper "Yao" and the lower "ル" are not completely connected, the strokes on the "Inner" are straight, and the lower "Session" is connected with the word "You"; On the other hand, the word "Joe" in the fake J 4 1M is completely connected, and the top pen of the word "Inner" is printed as an arc stroke, while the lower part of the word "Hui" is not connected, unlike a word "You".
The second is to distinguish the legibility of fonts. J 4 1M authentic three characters with more strokes and J 42M authentic six characters, namely, people, countries, postal services, tickets and Hong Kong, have clear fonts and broken lines. The fake tickets have blurred fonts and connected lines.
The third is to distinguish the characteristics of punctuation marks. The prefix "J" of J 4 1M is followed by the symbol "Stop", that is, J.41(1-Kloc-0/); The fake ticket "J" is followed by a comma, and the remaining symbols in brackets are J.4 1 (1. 1).
(3) Variant tickets for New China.
In recent years, there are two main methods to find pseudo-variants. One is forging tooth holes. The second is to turn the word brown. Someone used chemical reagents to fade or discolor a certain color of the stamp screen and forged it into a variant ticket.
(4) The postal envelopes "JF. 1", "JF.2" and "JF.22" in the cover series of "JF.1"and "JF.2" are "leaders" because of their small circulation, so their prices have risen rapidly and become counterfeit by criminals. The Bureau organized expert appraisal, and published the appraisal method in Stamp Collecting, which is authoritative. The excerpts are as follows: First, identify from the paper. JF. 1 and JF.2 are genuine 105g imported from woven paper with a thickness of 0.1/mm. Counterfeits are printed on two kinds of paper, one is 128g woven paper, and the paper thickness is 0. 14mm, which is obviously different from the real paper in thickness. One is double-sided coated paper printing.
Second, identify from the printing process. The counterfeit products JF. 1 and JF.2 are copied by copying the original by a copy printing process.
Third, from the perspective of color image differences, the issued genuine products are printed in special colors. The patterns and characters of counterfeit products are printed in three primary colors, and the color images are obviously different.
We can also find the subtle differences between fake and genuine products from its shape, size, shape and specifications.
1988 10, Liaoning provincial public security department cracked a case of forging Mei Lanfang's stage art stamp sheetlet, and criminals were also found selling rare and old stamps such as Huangshan, goldfish and peony sheetlet in some postal markets across the country. These fakes are all copied by a color copier, coated with glue and punched, which can almost be confused. To distinguish this fake, we should pay attention to its picture, see if there are coarse particles, if the lines of small handwriting are blurred, and if there is any difference between the color of the brush and the real one. There is also a counterfeit stamp of Old Kit, which was removed from the stamp catalogue and processed and manufactured by criminals. This kind of fake should be easier to identify.