A fashionable printing and packaging material - translucent paper

Transparency paper (glassine paper) is a thin paper with incomplete light transmission characteristics. The "translucency" is not a quantitative concept, that is, it does not reflect only half the light, but qualitatively reflects that it has incomplete light transmission. From an appearance point of view, this type of paper resembles a frosted glass, which is light gray and has a translucent feeling, and can be seen in the shape of the contents of the package. Therefore, the use of translucent paper as a packaging material can give the product a “mystery” and make the package more attractive. Translucent paper is commonly used in the field of flexible packaging as well as for some specialized applications. At present, the paper has been widely used in envelopes, photographs, candy wrappers, snack bags, biscuit carton linings, safety can sealing materials, medical packaging, inserts and the like.

The translucent papers are described below in terms of their physical properties, papermaking properties, and print processing properties.

Physical properties

Although translucent phenomenon is a negligible phenomenon in nature, translucent paper with translucent characteristics can make printed graphic information more clear, products more mysterious, and outer packaging more attractive. The semitransparent paper originally on the market has a high degree of transparency (low opacity) and low strength; today, there are various series of translucent papers on the market, which have different strengths and opacities.

The surface structure of glossy paper is very dense, and it has good barrier properties to oil, grease, and air. The paper is delicate and soft, and feels smooth. After wet super calendering treatment, it can make the paper surface smooth, shiny, with high tightness. The application of heat-sealing materials and barrier coatings on the paper is ideal. For example, materials such as polyvinylidene chloride (PVDC), polyethylene (PE), silica gel, hot-melt materials, and waxes have been obtained on translucent paper. Successful application. In the specific application, translucent paper can also be modified to make it suitable for any type of ink and printing machine (or suitable for various printing methods, strength requirements).

Translucent paper contains no filler and its opacity is very low. For this type of translucent paper, depending on weight and end use, it can be copied to a series of translucent papers with different opacities.

Paper bags, envelopes, and cartons are now printed on this unfilled translucent or bleached translucent paper. There is also a pigment-filled translucent paper in which a filler such as titanium dioxide TiO2 is added to block the passage of light through the paper.

Barcode quality control
2007/2/27/13:39 Source: Ke Yin Network Existing User Comments 0 Article Enter the forum

First, the bar code quality control

Bar code quality directly affects the use of barcodes. Bar codes that fail to meet quality requirements will not only improve management efficiency, but will cause confusion. Although the quality of bar codes has increased to some extent in recent years, examples of goods being rejected by supermarkets due to poor quality of bar codes have also occurred from time to time. Therefore, improving bar code quality is very important for both manufacturers and sellers.

Bar code printing looks very simple, it does not have complicated patterns and beautiful soft tones, so some companies use their printing requirements is relatively simple, it is not true, because the bar code of the empty combination contains specific information, and by the specific reading equipment Reading, therefore, there are strict regulations on bar code size, color matching, printing position, etc. details as follows:

1. Empty color match. When you match the colors, you must ensure that the contrast of the empty colors is large enough. The color of the bar can be: dark blue, dark green, dark brown, black, and the empty colors can be red, orange, yellow, white, of which the black and white are the best, and the true colors of the metal materials (such as gold and silver) are not suitable Or empty color.

2. Printing position: According to the different packaging forms, the position of the product bar code should be selected to meet the scanning requirements of the scanning equipment. It should be noted that the bar code must be at least 5 mm away from the edges, overlaps, wrinkles, or corners of the package to prevent the bar code from being worn, covered, or deformed with the package, causing problems during scanning. For example, a bean curd produced by an enterprise can be read on the packaging bag with a bar code mark in the bag when it is not loaded with the actual object. However, the bag is filled with the actual object. After the vacuum packaging process, the bar code can not be read due to improper position and wrinkle deformation. . Therefore, companies should determine the bar code printing position based on the actual sales of goods.

3. Bar code size: According to the size of the outer package of the product and the area allowed for printing, the bar code magnification factor is selected within the range of 0.8-2.00 times the standard bar code size. (The standard bar code refers to a bar code with a magnification factor of 1.00 and a size of 37.29*26.26 mm).

4. The height of the bar code: The height of the bar code should not be shortened in principle. If the location of the bar code must be shortened, the bar code technician should be consulted.

5. Barcode left and right blank area: when the scanner scans the barcode, it needs a low-level reset signal with a certain width to judge the beginning and the end of the scanning barcode. Therefore, left and right blank areas must be sized according to the four corner marks of the film, otherwise the barcode It will be difficult or even impossible to read.

6. Printing materials: When printing bar code symbols on transparent materials (such as plastics, glass, etc.), the color of the bar cannot be printed but the background color (empty color) is not printed. Otherwise, the scanner will not be able to read the empty reflection signal. Therefore, when printing barcodes on transparent materials, the background color must first be preprinted.

Second, bar code quality management requirements

1. Select packaging design unit

It is best to choose a printing company with bar code printing qualification and design ability as a design unit. If the company designs or commissions an advertising company to design it, it should pay attention to whether the design unit has participated in the barcode knowledge training organized by the coding center and obtained the certificate.

2. Product code must be unique

When the user codes 5 commodity codes (prefix codes 690, 691) or 4 digits (prefix codes 692, 693), he/she should use the product in terms of specification, brand, shape, weight, flavor, smell, price, etc. Different exist, give different code. This is the key to ensuring the uniqueness of the product's barcode, which is the normal operation in the scan shop.

3. Bar code original film should be ordered

In order to ensure the barcode's blank size accuracy and magnification factor, the user should order the original film to the barcode film production unit designated by the barcode organization.


4. Should be entrusted to the printing company that has been certified by the coding organization to print

Companies that print bar codes should have a high level of printing technology, and they must also have bar code printing qualifications certified by the coding center or its branch offices. It is recommended to select the bar code printing qualification enterprise recommended by this list for printing, and include the bar code quality requirements in the printing business contract.

5. Barcode sample printing should be tested before batch printing

Before the official batch printing, barcodes (samples) with bar code marks shall be sent to the bar code quality inspection agencies for technical inspection by the user or the printing unit (printers with bar code inspection capability may also perform self inspections). Batch printing.

6. Before the product packaging into the market to be qualified

It is forbidden to print or affix foreign objects such as production date, expiration date, price tag, product description, and anti-counterfeiting mark on the bar code; when the package needs to be overlapped, bar codes cannot be covered at the seams.

Reprinted from: Printed Today

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