To be aware of when packaging printing qr code?

Qr code we sweep every day, so, professional manufacturer of flexible packaging packaging & other round today; Packaging printing qr code what needs attention & throughout; This thesis we together to discuss. Qr code can be so monochrome black actually, also can be together so multi-color overprint. Already so that the factors affecting the quality of qr code printing fault is the main color comparison and overprint. A, color bags, mutatis mutandis, the color of the qr code above than not illumination will affect the mobile phone software to qr code identification. Printing bar code symbols of the optical properties requirements: in order to read, print, line of bar code and empty should have significant contrast, its empty reflectivity should as far as possible big, and the reflectivity of thread should be small as far as possible. Domestic newsprint according to national standard, the white degree is over 50%, normal printing can satisfy the requirement of the qr code identification. Together, to look out for is the manufacturing qr code in the newspaper, remember to tip modification can not add background, avoid than the condition of illumination not affect reading. Second, overprint fault is mainly refers to the colorful qr code. It necessary to ensure that qr code neat clear printing. In general, let's rule overprint fault ( The mass-tone attune with image overprint fault) The maximum value should be less than or equal to the narrowest line nominal width of the bar code 0. 4 times. According to the national standard, paper overprint fault requires less than or equal to 0. 3mm。 In fact, some printing equipment is advanced, the quality requirements higher newspaper at or above the provincial level in this regard can safely arrived in the specification. Some ShiBao, such as overprint not too safe, the proposal USES monochrome printing qr code, so there is no problem. Three, printing lost a part of the element, pay attention to don't lose your plate element, avoid the difficulty of reading qr code. In printing, because the cause of the plate or blanket, very simple form printing pictures. Should look out for this kind of qr code, it is a slightly & other; Crumbs fine & throughout; In the pictures. Four, the problem of the printing ink to the specification of the manipulation of the qr code symbol fault, is the key to control the ink color printing and printing pressure, to ensure that the qr code stripes accurate recovery. Under normal conditions, we should make sure that the ink is & other; Small water ink & throughout; , to ensure that the necessary printing ink layer thickness. Don't appear smaller pressure or gradation lacks the stripe of false; Don't appear pressure slants big or ink stripe laches.