mobile phones have smart 3 g era, 4 g smart quietly open era, more and more Internet technology applied to mobile phone, qr code is one of them.And the newspaper also frequent qr code, the reader through the qr code scanning software to parse the qr code, usually can be of a url, quickly get to the Internet to browse the web.This application is convenient for the reader to obtain relevant information, but also conducive to build three-dimensional paper, make the reader through an extension of the mobile phone easily read newspaper content.
Qr code printed in the paper, in the process of production the following questions need to be concerned.
1. The color contrast and alignment
Qr code can be monochrome black, also can be multi-color overprint.Are the major factors affecting the quality of qr code printing color contrast and overprint error.
(1) color contrast
(Gold Printing Group)
Newspaper color contrast of qr code will not affect the mobile phone software to qr code identification.Printing bar code symbols of the optical properties requirements: in order to read, reliable and after printing, bar code in the line and empty should have obvious 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.But note that when making qr code in the newspaper, to remind the editor can not add background, prevent contrast not affect reading.
(2) the overprint error
Mainly refers to color qr code.Must ensure that qr code neat and clear when printing.Normally, we provisions overprint error (the mass-tone attune of the overprint error) the maximum value should be less than or equal to 0.4 times the width of the narrowest line nominal bar code.Golden group sampling some of the misregister four-color dieyin black qr code, verify the reading effect.According to the national standard, the newspaper overprint error requires less than or equal to 0.3 mm.In fact, some printing equipment is advanced, the quality requirements higher newspaper at or above the provincial level in this regard can fully up to standard.Some ShiBao, such as overprint is not so stable, suggest qr code use monochrome printing, so there is no problem.
2. Printing missing some elements
When you print, you should pay attention to on the plate can't missing elements, so as not to cause the qr code reading difficulties.In printing, the printing plate or blanket, easy to cause the printing design defect, for qr code this slightly fragmentary design, in the late before printing plate making and pay special attention to check.
3. The problem of the printing ink
To control the qr code symbol size error, the key to control well in the printing ink and printing pressure, guarantee the accuracy of the qr code stripes reduction.Under general conditions, we put the ink to ensure water little ink, at the same time the necessary ink layer thickness.No small pressure or not enough ink produce stripes untrue;Don't appear pressure slants big or ink stripe diffusion.
The above are some of the common problems in printing qr code, is actually we daily quality management of the project.Hope the above experience will of newspaper printing qr code printing quality management job.
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