When are glue adhesion issues most likely to occur?
Referring back to the previous question, stock thickness also affects adhesive selection. Heavyweight coated stocks will make using a PUR adhesive more attractive. PUR adhesives are many times more costly, but may be necessary for certain applications. In addition, cross grain signatures can cause adhesion issues, and other issues can be caused when printers/designers do not allow for the proper masking off of the spine area on covers when varnishes and heavy ink coverage is being used. This refers back to the first question where these issues can be avoided if the layout is properly done. Stock or covers with slick coated surfaces make surface adhesion of the adhesive more difficult as well. Often, running a quick binding test will determine if the paper will need extra attention. Question: What benefits does automation bring to perfect bound jobs? Automation in perfect binding equipment is driven by a decline in run lengths, quicker turnaround requirements, and the need to easily tra
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