The anti-counterfeiting printing of scratch card is a company specialized in anti-counterfeiting printing. The printing quality level of anti-counterfeiting scraping card production, anti-counterfeiting ticket production and anti-counterfeiting voucher printing is higher than that of peers. Xiaobian below for you to introduce, tickets printing or coupons will be used in the production of one-dimensional bar code knowledge. According to the introduction of maintenance technicians, the use of one-dimensional bar code must be a member of the one-dimensional bar code system certified by the international or national coding center, and the enterprise printing one-dimensional bar code must apply for the printing qualification certificate of one-dimensional bar code. In order to ensure the correct and rapid reading of one-dimensional bar code, the decoding correctness, symbol consistency, minimum reflectivity, symbol contrast, minimum edge difference, modulation ratio, defect degree, decoding degree, blank area width, amplification factor, strip height and printing position of one-dimensional bar code need to be clarified and considered.
(1) Decoding Correctness: decoding correctness is the fundamental characteristic of one-dimensional bar code. In printing and plate making, one-dimensional bar code must be generated by special one-dimensional bar code production software, and the generated file must be vector file, not picture, otherwise, it will greatly affect the decoding degree and decoding accuracy of one-dimensional bar code.
(2) Symbol consistency: symbol consistency is the characteristic that the code represented by one-dimensional bar code symbol is consistent with the character for human recognition of the one-dimensional bar code symbol, and it is one of the other fundamental characteristics of one-dimensional bar code symbol. If the code represented by one-dimensional bar code symbol is inconsistent with the character for human recognition, it will lead to the difference between the human read information and the machine-readable information of the one-dimensional bar code symbol, and an error will occur.
(3) Minimum reflectivity: the minimum reflectivity is the scanning reflectivity curve. The reading system stipulates that the wavelength of the scanning light source is 630 ~ 700nm, so the red light effect of ink color should be considered. Black ink can completely absorb red light, and the reflectivity of printed matter to incident light is less than 3%, which is the safest color for one-dimensional bar code; white ink can completely reflect red light, and the reflectivity of printed matter to incident light is close to 100%, which is the safest blank color. Therefore, one-dimensional bar code is generally black and white. At this time, it is necessary to pay attention to the color of other products, but the red light effect is often used. According to the technical personnel of Weiwei scraping card, yellow, orange, red and gold with high red reflectance are easy to short, while those with low red reflectance such as green, purple and dark brown are easy to strip.
(4) Symbol contrast: symbol contrast is the difference between the highest reflectivity and the lowest reflectivity of the scanning reflectivity curve. In terms of material and ink matching, it is necessary to find out the color and contrast of the ink.
(5) Minimum edge contrast: edge contrast is the difference between spatial reflectance and strip reflectance of adjacent units on the scanning reflectance curve. If the symbol contrast and the minimum edge contrast are too small, the one-dimensional bar code is not easy to read, which is usually caused by printing materials and ink.
(6) Modulation ratio: modulation ratio is the ratio of minimum edge contrast to symbol contrast. Generally speaking, the modulation ratio is too small, so it is difficult to distinguish the strip and space scanning. One dimensional bar code is not easy to read due to modulation ratio, which is usually caused by the printing material or ink. When the ink is printed on the substrate, the edge of the bar dries up or diffuses, or the amount of ink is insufficient, which will lead to one-dimensional bar code not clear, double image, paste, etc.
(7) Defect degree: the defect degree is the ratio of the maximum unit reflectivity nonuniformity to the sign contrast. Generally speaking, the defect degree is caused by the printing appearance quality. When there are dirt, deinking and other large particles on the one-dimensional bar code, it will be difficult to read the one-dimensional bar code.
(8) Decipherability: it is a parameter related to the printing deviation of one-dimensional bar code symbol bar / space width. One dimensional bar code reading equipment should read one-dimensional bar code symbols with high decoding degree more smoothly than reading one-dimensional bar code symbols with small decoding degree.
(9) Magnification factor: Generally speaking, the smaller the magnification factor of one-dimensional bar code is, the more stringent the requirements for bar / space size deviation are, and the more difficult it is to print. For the one-dimensional bar code with magnification factor less than 0.80, the printing quality is not easy to guarantee, and it is easy to cause reading difficulty. One dimensional barcode symbols with magnification factor greater than 2.00 take up too much area of commodity packaging, and some reading devices, such as CCD readers, have limited reading width, which is easy to cause reading difficulties. Therefore, the magnification factor of one-dimensional bar code should be 0.80-2.00.
(10) Width of blank area: the function of the blank area is to provide "start data acquisition" or "end data acquisition" information for the reading equipment. Insufficient width of the blank area often results in one-dimensional bar code symbols not being read, and even causing misreading. Therefore, the width of the blank area should be guaranteed. For example, when the amplification factor is 1.0, the minimum width of the blank area on the left and right sides of EAN-13 code is 3.63mm and 2.31mm respectively, and that of ean-8 code is 2.31mm.
(11) Bar height: the smaller the height of one-dimensional bar code, the higher the requirement of scanning line aiming at one-dimensional bar code symbol, and the lower scanning reading efficiency. Therefore, in design, the height of one-dimensional bar code is higher than that of a scanning line.
(12) Printing position: whether the printing position of one-dimensional bar code on the package meets the requirements directly affects the reading rate of one-dimensional bar code, such as whether there are perforations, punching cuts, drawing braces, seams, folding, folding, folding, overlapping, ripple, bulge, fold, and other graphics and texts, etc., which will damage or hinder the one-dimensional bar code symbols.
