Technical requirements for printing one-dimensional bar code

The use of one-dimensional barcodes for merchandise must be a member of a one-dimensional bar code system certified by an international or national coding center. Enterprises that print one-dimensional barcodes must apply for one-dimensional bar code printing certificates. To ensure one-dimensional bar code reading correctly and quickly, one-dimensional bar code decoding correctness, symbol consistency, minimum reflectivity, symbol contrast, minimum edge difference, modulation ratio, defect degree, decodability, blank area width The magnification factor, bar height, and print position are all issues that need to be clarified and considered.

1. Correctness of decoding The correctness of decoding is a fundamental characteristic of one-dimensional bar codes. When printing plates, one-dimensional bar codes must be generated using a dedicated one-dimensional bar code creation software, and the generated files must be vector files and cannot be pictures. Otherwise, the decipherability and correctness of decoding of one-dimensional bar codes are greatly affected.

2. Symbol Consistency Symbol consistency is the property that the code represented by a one-dimensional bar code symbol is consistent with the human-readable character of the one-dimensional bar code symbol and is one of the fundamental characteristics of the one-dimensional bar code symbol. If the code represented by the one-dimensional bar code symbol does not coincide with the human-readable character, the human-readable information and the machine-readable information of the one-dimensional bar code symbol will be different, resulting in an error.

3. Minimum reflectance The minimum reflectance is the scanning reflectance. The read system specifies that the wavelength of the general scanning light source is 630 to 700 nm, so the red effect of the ink should be considered. Black ink can completely absorb red light. The reflectivity of incident light is less than 3%. It is the safest one-dimensional bar code color. White ink is completely reflective to red light, and its reflectance to incident light is close. 100% is the safest blank color, so one-dimensional barcodes are generally black and white. However, in order to increase its decorativeness, the use of other color oils is often used on commodity labels. In this case, special attention should be paid to the red effect of ink. Red, yellow, orange, red, and gold, which have high red reflectivity, are easy to short, and green, purple, and dark brown, which have low red reflectivity, are easy to make.

4. Symbol contrast Contrast is the difference between the highest reflectivity and the lowest reflectance of the scanning reflectance curve. Signs of large contrast, indicating that the bar, empty color with a suitable or printing materials and ink reflectivity to meet the requirements; symbol contrast is small, you should find in the bar, empty color, printing materials and ink and other aspects.

5. Minimum Edge Contrast The edge contrast is the difference between the empty reflectance and the strip reflectance of adjacent cells on the scan reflectivity curve. The contrast between the symbol contrast and the minimum edge contrast will lead to one-dimensional bar codes being difficult to read. This is usually caused by printing materials and inks.

6. Modulation ratio The modulation ratio is the ratio of the minimum edge contrast to the sign contrast. In general, the modulation ratio is too small, and it is difficult to distinguish between bars and spaces. Modulation ratio causes one-dimensional bar codes to be difficult to read, usually due to printing materials or inks. Ink is printed on printing materials. The edges of the bar are blemished or spread, or the amount of ink is insufficient, which can lead to unclear one-dimensional bar code, ghosting, Paste version and so on.

7. Defect degree Defect degree is the ratio of the maximum cell reflectance non-uniformity to the symbol contrast. Generally speaking, the defect degree is caused by the quality of the printed appearance. When the one-dimensional bar code has dirty, de-inked and other large particles, it will cause the one-dimensional bar code to be difficult to read.

8. Decodability The decodable degree is a parameter related to the one-dimensional bar code symbol bar/void width printing deviation. A one-dimensional bar code reading device should be able to read a one-dimensional bar code symbol with a higher decipherability than a one-dimensional bar code symbol with a low decodability.

9. Magnification factor In general, the smaller the magnification factor of a one-dimensional bar code, the stricter the requirement on the strip/void dimension deviation and the more difficult the printing. For a one-dimensional bar code with a magnification factor of less than 0.80, the print quality is not easy to guarantee, and it is easy to cause difficulty in reading. A one-dimensional bar code symbol with a magnification factor of more than 2.00 occupies too large an area for a product package, and some reading devices, such as a CCD reader, have a limited reading width, which easily causes difficulty in reading. Therefore, the magnification factor of the one-dimensional bar code product should be 0.80 to 2.00.

10. The function of the blank area width blank area is to provide “start data collection” or “end data collection” information for the reading device. The width of the blank area is often not enough to cause the 1D barcode symbol to be unreadable or even misread. The width of the area should be guaranteed. For example, when the magnification factor is 1.0, the minimum widths of the left and right margins of the EAN-13 code are 3.63 mm and 2.31 mm, respectively, and the minimum width of the blank space on both sides of the EAN-8 code is 2.31 mm.

11. The smaller the height of a one-dimensional bar code, the higher the requirement for the scanning line to aim at the one-dimensional bar code symbol, and the lower the scan reading efficiency. Therefore, in design, one-dimensional bar code height is higher than one scan line.

12. Whether the printing position of the one-dimensional bar code in the printing position meets the requirements on the packaging directly affects the reading rate of the one-dimensional bar code, such as whether there are perforations, punching cuts, drawing strips, seams, folding, folding, overlapping Whether ripples, ridges, wrinkles, and other graphics and texts cause damage or obstructions to one-dimensional bar code symbols.

Modern Desk

Mid Century Modern Desk,Modern Office Desk,Modern Computer Desk,Contemporary Desk