Talking about the Identification of Valuable Tickets and Documents

When we hold a valuable print, such as cheques, certificates, banknotes, invoices, etc., once it is identified as a counterfeit product, the rights of the holder immediately suffer. Therefore, it is necessary to have some knowledge of identifying the authenticity of tickets (vouchers) so that timely measures can be taken to safeguard their rights and interests.

First, the identification of paper

Paper is mainly composed of plant fibers and auxiliary materials, plus special treatment. Its main physical properties are: durability, tear resistance, resistance to strokes, smooth surface, easy writing, and a sense of value. Therefore, it can be identified from the following aspects:

1. The security paper has no depth of watermark or watermark. Illumination of light or comparison of two identical tickets (vouchers) can be used to identify frauds.

2. The color and position of the dark line. The general paper does not need to put dark lines, only special paper (coupon) paper, there are many different colors of dark lines, in the production of a single color or multi-color mixing, if the position, color is the authentic Of course, sometimes slight differences are not counterfeits, but errors in production.

3. The structure of special filaments. According to the characteristics of different documents (vouchers), the production of different fiber filaments and their distribution are also different, sometimes colored visible fiber filaments, but also invisible fiber filaments. Both are under ultraviolet light, which can be reflected by fluorescence. There are different colors and special structures. These are the key points for identification.

4. The thickness and evenness of the paper. The thickness and evenness of paper can be seen through light or light to see if the distribution is even and can be identified by hand.

Second, ink identification

The identification of ink is a more professional method, and most people are not easily identifiable.

Ink is a combination of pigments and some additives. It can be distinguished from the following methods:

1. Color color: Carefully observe the color of the printed matter is correct and bright, and has a glossy.

2. Texture: Letterpress and gravure prints often have strong texture and bright colors. You can use your hands to directly touch the surface with convex and concave feelings. Plain printing shows the pattern is more even and the pattern is lighter.

3. Water resistance: According to the different printing products. Water-resistant inks can be selected. If there are any price certificates (vouchers) to prevent the use of water, alcohol and other liquids to change the face of the ticket, the use of water-soluble ink, making it difficult to achieve the purpose.

4. Lightfastness: Inferior inks often fade after exposure to intense ultraviolet light and sunlight for a certain period of time.

5. Abrasion resistance: According to the different printing products, some often use ink with strong abrasion resistance to prevent alteration.

6. Special ink:

1 Fluorescent ink: This ink is fluorescent under ultraviolet light irradiation. Divided into colored and colorless fluorescent inks.

2 Photo-induced variable inks: The ink's special features are colorless, easy to distinguish between authenticity and counterfeiting. Identify only in two seconds under the violet light or in the sunlight.

Third, the identification of printing methods

Different printing methods, printed materials also show different characteristics, these features will also bring favorable conditions for identification, the following briefly describes the characteristics of several commonly used printing methods:

1. Lithography: is a commonly used indirect printing method, characterized by the average imprint, imprinted around the same, ink printing ink is lighter, the ink layer is thinner, the color brightness is lower.

2. Letterpress printing: It is a kind of commonly used direct printing method, which is characterized by a thick ink layer and a strong glossiness. When a printed image is observed with a magnifying glass, the lines, the drawings are surrounded by empresses, burrs, and the strokes are not neat.

3. Gravure printing: It is a kind of special printing method, which is characterized by thick ink layer and strong gloss.