The hottest ink and paper play an important role i

  • Detail

Ink and paper play an important role in anti-counterfeiting printing; Pay attention to the computer cable when raising the control cabinet; Location

with the understanding of counterfeit products, people are more and more aware of the important position of ink and paper in anti-counterfeiting printing. The functions of the two are discussed below:

I. ink:

many safety inks can mark "the original has been changed" or prove that an original is true. Here are some safety inks:

1 Chemical solvent reactive inks

these inks will disappear, fade and get dirty when they come into contact with eraser, bleach, water or other solvents

inks that react with solvents are usually printed on the background area or an area of the document. For example, when printing the data area of a check with this ink, the change of the check is easy to be detected. According to different ink types, the ink will disappear, fade and get dirty when changing. These inks can be used in many documents to prevent damage. One of its main applications is discount checks

chemical sensitive inks are evaluated by ANSI x9b10 Committee. They have a strong ability to prevent changes. 3/10 of this ability is to prevent erasure. 7 therefore, 1 it is necessary to regularly check the temperature, vibration and internal wires of the electromechanical system/10 to prevent reaction with bleach and other solvents

2. Erasable ink

erasable ink can provide a clear and visible indication, which is often used to print the background color. If someone wants to change the check, the ink will be erased. A bright or light field background is the most effective, because the erasure will be obvious and the background will not be easily copied by the color copier. Erasable inks come in a variety of colors, including fluorescence. One of its applications is hotel guest checks, which include the background of the quantity area printed with erasable ink. If the customer tries to change the total number by erasing, the colored background will disappear

3. Fluorescent ink

this ink, which is sometimes invisible to the naked eye, will glow under ultraviolet or infrared light. Due to its convertible and esoteric characteristics, the heart can not be accurately copied on the color copier, making this ink more and more popular in some applications. Some parts of the check, such as MICR line, can be made into fluorescent color; Or a whole piece of a check is characterized by fluorescent color. For example, watermarks are sometimes printed with fluorescent ink. Many currencies in the world are printed with fluorescent ink, which has a wide range of colors

4. Infrared ink

this ink absorbs or reflects infrared light. When a box of black infrared ink is printed on a message, the ink is used to cover the "true" or "original" message, which can only be read under the infrared light. The information itself can also be printed with infrared ink and can only be displayed under infrared light. Just like using fluorescent ink, the person who verifies the document must have knowledge of ink display and appropriate equipment

5. Penetrating ink

penetrating ink is often used to print MICR data on checks. The ink will penetrate the bottom layer and show the printed content on the back of the document. Changes in numbers and other illegal information can be detected by comparing the positive and negative. In some special cases, invisible fluorescent ink can be added as a cover feature to provide special security

penetrating ink can be used on cash record sheets to prevent customers from changing information in order to get more money from rebates. At the same time, this ink can also prevent the duplication of record sheets

6. Thermal chrome ink

this ink is also called thermal ink. When a person touches a document, the ink will change color due to the influence of human body temperature. When it is no longer touched, it will change back to its original color. The ink is now being used in medical prescription labels to reduce pharmaceutical swindlers. Generally, thermal chrome ink is printed on one side of the table below the patient's name, age, address and date, and the ink will disappear automatically when touched

there are many kinds of color changes, including from blue to colorless, orange to yellow to red and then to colorless. Double thermosensitive chromium ink will change color when it is rubbed, and intensified friction will make it continue to change into another different color. Colorless to colored thermal chromium ink main 12. The sample should be used for direct mail, advertising, promotion materials, packaging, labels, educational and learning aids, stationery and other novel things; Thermal chromium ink with color to colorless transition is mainly used for safety documents, because even a color blind can distinguish the color to colorless transition to inspect documents

many suppliers provide ink with friction discoloration, which is due to friction in recent years rather than body temperature. Just like the self-contained carbon free coating, the ink is encapsulated and coated, and the inspector is required to scrape it with nails or objects to find information. Unlike thermal chrome ink, this kind of ink will not change back to its original color. It also has chemical changes. When it comes into contact with chemicals, the ink will turn blue automatically or partially. This kind of ink is used on documents and important checks, and can be printed publicly or in seclusion

II. Paper

security paper is a rapidly growing part of the paper industry, which can effectively prevent documents from being stolen. Many companies in the United States have begun to provide safe paper, and many (not all) of the technologies discussed below are provided by several paper manufacturers

1. Chemical reaction paper

this paper reacts with the following solvents: bleach, nail rust remover, gasoline, kerosene, paint thinner and turpentine. When reacting with solvent, the paper will turn into another color or display a multi symbol useless information

2. Safety fibers and marking materials

paper makers provide various raw materials for manufacturing safety paper, such as hidden or public fibers, marking materials, etc. Sophisticated materials, such as fluorescent fibers or labeling materials, can be detected by ultraviolet light. Just like fluorescent safety inks, fluorescent fibers and marking materials cannot be copied or scanned

3. Toner cured paper

this paper is considered to be easier to "absorb" laser printing toner than ordinary paper, which makes it difficult for offenders to change checks or other information. This is designed for end users who print checks with lasers

4. UV dull/dead paper (dull: partially transparent or reflective light; dead: opaque or non reflective light)

UV dull paper extracts most of the fluorescent color from the paper, while UV dead paper has no fluorescent color at all. The watermark printed with fluorescent ink on UV dull/dead paper will be brighter under UV light, because the paper will not affect the watermark

5. Watermark

there are many kinds of watermarks for secure files, such as shape watermarks. When the paper is wet, imprint an image into the paper. When facing the light, you can see this watermark from both sides of the document

artificial watermark can also appear on both sides. Sometimes it looks like a real watermark, but it is cheaper than a real watermark, because it does not include the cost of molding. Both watermarks are difficult to copy. Watermarks can be printed with fluorescent ink, so they glow under ultraviolet light

III. The key to the successful application of safety features in the future safety printing is the understanding level and correct use of document inspectors. For some suppliers, how to teach end users and document inspectors to detect safety features based on ink and paper is a big problem. Some suppliers rely on manufacturers to teach customers, or ask manufacturers to hold seminars for their customers

but whether it is machine inspection or manual inspection, neutralizing the safety characteristics of ink and paper is usually better than relying on ink or paper alone. The more security features a document contains, the less likely it is to be forged

source of information:

Copyright © 2011 JIN SHI