There are usually the following situations:

      The shape design of goods is incorrect. Drinks, especially polyester bottled drinks, have concave and flat shapes. However, bar code symbols are usually printed on plastic labels. After the labels are pasted on the bottles, Quality Control And Management Experience Of Bar Code Printing

      they become uneven and wrinkled with the bottle shape, resulting in the bar code symbols can not be read correctly.Quality Control And Management Experience Of Bar Code Printing

      In this case, when designing the shape of the bottle, ensure that the part of the label is smooth.Quality Control And Management Experience Of Bar Code Printing

       The bar code printing position is incorrect. For some bagged commodities, the bar code symbol is printed close to the edge of the bag. Although the inspection is qualified after printing, the bar code can not be read correctly after the contents are deformed and folded. The correct method is to avoid seams and deformed parts when designing the bar code position. Quality Control And Management Experience Of Bar Code Printing

      It is best to first fill the contents in the bag, observe the flat part, and then print the bar code symbol at this position.Quality Control And Management Experience Of Bar Code Printing.Quality Control And Management Experience Of Bar Code Printing

     For some boxed goods, the bar code symbol is qualified when the packaging box is tiled, but after the carton is folded, the bar code symbol is partially covered, or the left and right blank areas are insufficient. This should be fully considered when designing the barcode position.Quality Control And Management Experience Of Bar Code Printing

      In order to pursue the upgrading of commodities, most commodities are covered with heat shrinkable film, which also leads to the disqualification of bar codes. After the heat shrinkable film shrinks, it cannot shrink flat on the corner of the commodity, forming wrinkles, and the bar code symbol at this position cannot be read correctly.Quality Control And Management Experience Of Bar Code Printing

      Some commodities, especially children’s commodities, put marks and small toys between the heat shrinkable film and commodities to attract customers. It is common to put three-dimensional crystal glue on bubble gum, which often hides part or even all of the bar code symbols, resulting in inability to read.Quality Control And Management Experience Of Bar Code Printing

      Other contents are marked on the commodity, resulting in the unqualified bar code. The common contents of food are marked with production date, production batch number, shelf life and so on: they are wrongly marked on the bar code symbol.

Boxed food is marked with pad printing ink and manual code printer. The bar code position on some boxes is designed on the other side corresponding to the marked date position.Quality Control And Management Experience Of Bar Code Printing

       However, it takes a period of time for the pad printing ink to dry after printing, 2-5 seconds for fast drying ink and more than 5 seconds for slow drying ink.Quality Control And Management Experience Of Bar Code Printing

      When the box is pushed after the date is marked, the wet ink will pollute the bar code symbols on the other box, and the amount of stacking will pollute the amount, forming stains and unable to read correctly, which should be paid attention to when designing the bar code position.Quality Control And Management Experience Of Bar Code Printing

      When the quick-frozen food of special commodities, such as ice cream, is taken out after refrigeration, a thin layer of ice is condensed on its surface due to low temperature, and all or part of the bar code symbol is covered,Quality Control And Management Experience Of Bar Code Printing

        so it can not be read correctly. This kind of goods is seasonal and short-term, so in store code should be adopted.Quality Control And Management Experience Of Bar Code Printing

       In short, to ensure the quality of bar code printing, we should not only control the bar code printing process.Quality Control And Management Experience Of Bar Code Printing