When applying self-adhesive labels to the substrate it is important to be aware of what the actual surfaces consist of. Glass may be plain, but is often coated with chemicals such as polycarbonates or oleic acid which prevent chipping during transportation or on the filling line. corrugated board has a variable moisture content, and is mostly recycled material. Some "strong" acrylic adhesives are useful but tests need to be done, especially if the packaging has to go through freeze-thaw cycles. The "open time" for each adhesive needs to be found, that is the time during which the label can be removed or repositioned before there is a permanent bond. One problem with plastic containers is that they produce static electricity. If the container has the same polarity as the label, it will be repelled, if opposite, the label may be attracted too quickly.
