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Key points of QR code print in book printing

Due to the defects of printing equipment, printing plate, ink and manual operation, there will be deviation in the book printing of QR code. It is precisely because the QR code may have poor quality in the printing process, so we should detect the QR code before use, otherwise we can't read the QR code, which will affect customers' trust in the product. In the actual production of QR code printing, the following problems need special attention

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Key points of QR code print in book printing

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  1. Key points of QR code print in book printing process Duetothedefectsofprintingequipment,printingplate,inkandmanual operation,therewillbedeviationinthebookprintingofQRcode.Itis preciselybecausetheQRcodemayhavepoorqualityintheprintingprocess, soweshoulddetecttheQRcodebeforeuse,otherwisewecan'treadtheQR code,whichwillaffectcustomers'trustintheproduct.Intheactualproduction of QR code printing, the following problems need special attention. Color contrast and registration TheQRcodecanbemonochromeblackormulti-coloroverprint.Themain factorsaffectingtheprintingqualityofQRcodearecolorcontrastandoverprint error. Color contrast InsufficientcolorcontrastofnewspaperQRcodewillaffecttherecognitionof QRcodebymobilephonesoftware.Requirementsforopticalcharacteristicsof barcodeprintingsymbols:inordertoreadreliably,thereshallbeobvious contrastbetweenlinesandspacesinbarcodeafterprinting,andthe reflectivity of spaces shall be as large as possible, while the reflectivity of lines shallbeassmallaspossible.Accordingtothenationalstandard,the whitenessofdomesticnewsprintismorethan50%,andthenormalprinting canmeettherecognitionrequirementsofQRcode.However,itshouldbe noted that when making QR codes in newspapers, editors should be reminded not to add shading to prevent insufficient contrast from affecting reading. 2. Overprint error ItmainlyreferstocolorQRcode.TheQRcodemustbeneatandclearduring bookprinting.Generally,wespecifythatthemaximumoverprinterror (overprinterrorbetweenmaintoneandpicture)shouldbelessthanorequalto

  2. 0.4 times the nominal width of the narrowest bar code. Accordingtothenationalstandard,theoverprinterrorofnewspapersis requiredtobelessthanorequalto0.3mm.Infact,somenewspapersabove theprovinciallevelwithadvancedprintingequipmentandhighquality requirementscanfullymeetthestandardsinthisregard.Forsomelocal newspaperswithunstableoverprint,itisrecommendedtousemonochrome printing for QR code, so that there is no overprint problem. 3. Some elements lost in printing Whenprinting,payattentionnottoloseelementsontheprintingplate,soas not to make it difficult to read the QR code. In printing, due to the printing plate orblanket,itiseasytocauseprintingpatterndefects.Fortheslightly "fragmented"patternofQRcode,specialattentionshouldbepaidtopre printing plate making and post inspection. 4. Printing ink problem TocontrolthedimensionalerrorofQRcodesymbols,thekeyinprintingisto controltheinkcolorandbookprintingpressuretoensuretheaccurate restorationofQRcodestripes.Undernormalconditions,weshouldensure thattheinkis"smallinwaterandsmallinink",andensurethenecessaryink layerthickness.Nofringescausedbylowpressureorinsufficientinkcolor; There is no fringe diffusion caused by high pressure or large ink.

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