Commonly used shading anti-counterfeiting technology for bill printing

1, ordinary shading

Ordinary shading generally includes patterns of ground, flowers, and lace.

Landmarks are patterns that are placed on the bottom layer of printed content and are used purely as backgrounds. It is a continuous stretch of texture formed by repeated changes of line elements. In the printing of tickets, it is always achieved by printing the first set of color sequences on the front side. Landmarks are characterized by variability, using a few fine lines of light colors to form a layer of elegant base maps. The group flower is based on a variety of shapes of flowers as the basic shape, with the lines of density, thickness, curvature and color changes, appropriate deformation and exaggeration to form a clear hierarchy, beautiful lines, smooth outline of the independent formation of flower-like Graphics. The floret effect can be used alone or combined with other effects to produce excellent visual effects. Lace is a hollow frame pattern formed by continuous replication of one or more line elements. Fully enclosed and semi-closed, with single lace and double lace. Due to the characteristics of the frame style of lace itself, it often does not overlap with other printed content, so its color can be slightly brighter, and there are many peripheral decoration effects in the printing of notes.

In designing the above shading, the line thickness and the line spacing can be changed at any time, so the designed figure is also sparse or dense, and the time is different. Its anti-counterfeiting effect in ticket printing is mainly reflected in the complexity of the pattern and anti-copy function.

2. Relief

The use of lines and patterns as the bottom, through the combination of text or logo images, the effect of embossing patterns produced by embossed design operations, the design of the effect must be composed of two parts shading and pictures, pictures used to make concave and convex graphics , And before using it, you must first convert continuous pictures into line graphics. Its design principle is that there are differences in line thickness and density between the lines of the shading part and the picture part. When the two sets of figures are combined together, it seems that the two parts of the pattern seem to be located on different levels. The picture content is concave and convex. The sense of embossed effect.

When creating the relief effect, the picture material can be arbitrarily selected according to the actual needs of the ticket, that is, the content of the bump can be varied to produce interesting and vivid screen effects. For example, in the bills used by medical institutions, it is possible to design "10" reliefs, and on the tax papers, reliefs of "SW" can be produced. If zoo tickets are used, animals can be used. This makes the bill not only has an excellent anti-counterfeiting effect, but also has a sign function.

3, miniature

Microfilming is the reduction of text to a degree that is invisible to the naked eye, and the concatenation of these reduced characters into a line or a graphic effect. The Chinese text is required to be within 0.22mm in height after being reduced, and the English text is within 0.2mm in height after being reduced. The lines formed by using microtext can also form various patterns and have a good anti-counterfeiting function. The micro design feature is to replace lines with words, combined with other features of the shading design, can generate many changes. These microscopic lines are generally made up of words with specific meanings. Sometimes it is necessary to use a magnifying glass to see the words. This anti-counterfeiting method is very common in the printing of tickets. In general, the scratch-off tax invoices in all parts of the country have a miniature line under the words “scraping area”. For example, in Gansu Province's scratch-off tax invoice in 2003, the microscopic line under the magnifying glass was composed of the four letters “GLTB”, which is the abbreviation of “Gandhi Tax”.

This type of anti-counterfeiting can form micro-line patterns, micro-line laces, and micro-threads in the shading design. It can also be arranged alternately in English and Chinese. Miniaturization design is convenient and quick, but it is exquisite and unique in expression, rich in change, and plays a dual role in anti-counterfeiting and creativity.

4, unlocked

Unlocking is an embossing effect created by the interference of light. Different from ordinary relief, its uneven effect can not be seen directly, but through a special "diaphragm" to see the true image of the relief image. The material of this film is similar to that of film, and the intensity of its interference with light should be matched with the design procedure, that is, the diaphragm and the implied design content are in one-to-one correspondence. Diaphragm is an indispensable tool for observing patterns. It is like a key to unlock the mysterious lock. Therefore, this hyper-line anti-counterfeiting effect is called "unlocking." The content of the unlocking effect is unrecognizable by the naked eye, and even if such shading is reproduced by a copying method such as photographing or scanning, it is impossible to duplicate the effect even with the unlocking effect, and the anti-counterfeiting property is extremely strong. In addition, unlocking also has a wide range of applications, flexible form, low production costs, easy to identify and other characteristics, is a highly potential anti-counterfeiting method.

5, line

In the super-line design, the 劈 line is the effect of forming a pattern by dividing a line into two or more thin lines. Its main feature is the ability to achieve continuous variable thickness lines. For example, if a 1.2mm line passes through a twist line, two 0.6mm thin lines can be formed, and three 0.4mm thin lines can also be generated. Lines can be divided from one line to multiple lines, and they can also be composed of multiple lines. This type of line is impossible to achieve by general graphic processing software, and the thickness of this line in the rifle line effect frequently changes, raising the difficulty of image input device recognition, so that it is not recognized at all, and is extremely strong. Anti-copy function, so its anti-counterfeiting feature is obvious.

Understand the various anti-counterfeiting features of shading, and pay attention to the following two points when using shading anti-counterfeiting technology:

1) If a document with a security shading is likely to be reprinted many times, you must leave a design script and related data. Such as the thickness of the line, the angle of inclination, the cycle of the cycle, the ratio of spot colors, etc., to prepare for the next use. Otherwise, you may not be able to design the exact same anti-counterfeiting shading as you used to, and make a joke that you "defend" yourself.

2) In the use of shading, it is not appropriate to use colors that are too pure or too bright. This is because the bright colors of high purity can be easily separated by filters through photographs, etc., facilitating copying by counterfeiters. Therefore, the use of color as much as possible with a low saturation color, is conducive to anti-counterfeiting. In the process, a small amount of black or brown ink is generally added to the color ink to reduce the purity of the color ink and improve the anti-copy performance of the shading.