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Label Quality Issues for Automated Labeling
The most critical aspect of label manufacturing (a.k.a. converting) that can impact automated dispensing of labels is the die-cutting process. The trait most associated with labels that have been poorly de-cut is a die strike that penetrates both the label and the silicon coating of the liner that carries the label. A die strike that penetrates the silicon coating of the paper liner brings with it a small amount of adhesive from the back of the label. In essence, this glues the label to the interior fibers of the common paper liner and makes it difficult (or impossible) for the labeling system to peel the label from the liner - decreasing the likelihood that the label will separate from the liner at all. Labels that won't separate (peel) can't be picked and placed, bringing the entire process to an abrupt halt.
Label converters who produce quality materials are familiar with die and die-cut quality standards that allow them to "kiss" the liner with each die strike. The die may actually impact the liner but it not penetrate - this allows the liner material to release the label when peeled across the sharp edge of a thermal transfer printer's peel blade. You can quickly test the quality of die-cutting for your existing materials by following the dye stain testing procedure contained in Amistar's Label Quality Specification.
Many companies now specify that their labels be supplied on non-paper, "poly" liners to minimize the issues associated with label die cutting. Although a DataPlace system will function reliably with quality labels from any source or in any material, poly liners do eliminate a manufacturing variable and tend to improve performance in terms of operator attendance to the system.
There are other important quality factors involved in the conversion of your label materials. For more information about these issues, as well as die-cutting, see Amistar's Label Quality Presentation.
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