Anti-counterfeiting paper machine is a device that produces paper with anti-counterfeiting function. It usually has some special structure and functions to realize the application of various anti-counterfeiting technologies on paper. It is widely used in banknotes, tickets, important documents and printed matter.

How the paper machine works

The working principle of the paper machine is mainly realized through the following parts: paper supply, stock distribution, dehydration, pressing, drying, pressing, rolling paper.

1. Paper feed part: The paper raw material is cut to the appropriate size and sent through a series of conveyor belts to the next stage.

2. Pulp distribution part: The pulp is screened on a rotating screen, and chemicals are added to improve its quality.

3. Dehydration stage: Water is removed from the pulp by high pressure and high speed rotation.

4. Pressing and drying: the pulp is compressed and further dehydrated.

5. Calender: Use high pressure and high temperature to smooth the paper and improve its quality.

6. Roll the paper: Roll the paper to the appropriate length and cut it.

The advantages of paper machines lie in their efficiency and flexibility. In addition, paper making machinery includes raw material preparation, pulping, paper making, until the production of rolled or flat finished products, as well as processing paper and board machinery, covering the entire production process from raw materials to finished products.

Production   Name	YD787Security   Paper Production Line
Output paper	Offset paper
Daily Capacity	2-3T/D
Raw material	Waste paper, wood   pulp
Net Paper   Width	787mm
Product weight	50-120g/m²
Floor area	160–240m²
Factory Width	4.5m
Factory Height	3m
Work speed	50-120m/min
Suitable   voltage	220-380-440V
Class people	3-4

Classification and application of anti-counterfeiting paper

Fiber paper

When making paper, colored fibers such as red and blue or colored small pieces (dots) are mixed into the pulp, or scattered on the surface of the paper before it is formed. Under ultraviolet irradiation, there is fluorescent reflection, making the paper contain colored fibers that are different from the paper itself. There are two types of red and blue fibers and colored dots mixed into pulp: colored fibers and colorless fluorescent fibers. The former can be seen on paper with the naked eye, while the latter and colored dots must be visible under ultraviolet irradiation. Their colors include red, blue, orange, etc., and their shapes can be coarse or fine, long or short. Fibers and colored dots are generally randomly distributed, so their density and amount of exposure vary.

Anti-counterfeit holographic paper

Holographic products based on paper are divided into two types: transfer type and non transfer type. Laser anti-counterfeiting technology is combined with paper to produce anti-counterfeiting paper. The first method is transfer method: using holographic anti-counterfeiting technology and specialized equipment, the molded holographic image transfer method (hot stamping, composite peeling, UV light curing, etc.) is partially or completely transferred onto paper. The second method is direct plating: applying a polymer coating on paper and directly plating aluminum, and then molding holographic images.

Watermark paper

Watermark paper is a type of paper that features relief, perspective, tactile images, barcodes, and more. The banknotes use watermark anti-counterfeiting technology. Due to the fact that watermarks cannot be reproduced using photocopiers, scanners, etc., their anti-counterfeiting effect is highly valued. Nowadays, the application scope of watermarks has expanded to valuable documents, certificates, and even books and periodicals. Watermark is a technique used in the papermaking process to embed desired markings, patterns, etc. into paper, such as installing pre designed watermark graphic printing plates on a screen or pressing them through a printing cylinder. Due to the different heights of the text and images, the pulp forms corresponding densities of different thicknesses. After the paper is made, the density of the pulp at the text and image locations varies, resulting in differences in transparency. Therefore, when observing the transparency, the original design of the text and images can be displayed. Black and white watermarking is the process of increasing or decreasing the thickness of paper layers according to different tones.

Anti counterfeiting paper with security thread

Placing a gold or plastic thread in the middle of the paper during the papermaking process. The earliest use was special metal wire, and now polyester plastic wire, miniature letter safety wire, fluorescent safety wire, magnetic wire, etc. are used. The shape of the safety line includes straight lines, waves, serrations, etc. According to relevant information, the new version of the US dollar bill not only embeds metal wires in the paper, but also miniaturizes the text on the wires that can only be seen with a high-power magnifying glass.

Anti copying paper

One type is full absorption anti copy paper, which appears blue and brownish red on the outside. The text and images on the paper can only be seen through light, and its copies are completely black. But this type of paper is not convenient for daily use. Another method is to apply a very thin aluminum protective layer on the surface of the paper (but without affecting printing), as the aluminum protective layer can disperse or deflect the light of the copier, making the copy appear black. Photochromism, thermochromism, optical variability (OVI), photoluminescence, diffuse reflection, etc. can all be used for anti copying.