Blister - What does blister mean?
A bubble that forms when gas or fluid is trapped underneath a layer of material. In labels, this can occur in face materials, coatings, and beneath the label itself during application.
Face materials such as paper may end up with blisters during the manufacturing process; these blisters are usually caused when the material is dried incorrectly. For example, moisture within the material may evaporate during the drying process, which causes the moisture to expand and create a bubble within the material. Coatings that are dried incorrectly may also end up with bubbles created from gas or fluids within the coating or on the surface of the face material being coated. Finally, when a label is applied to a substrate, it is common for air or any fluid that is on the surface of the substrate to become trapped beneath the label, creating a blister. This can be avoided by taking care during the application of a label and ensuring that blisters are smoothed out before the adhesive is allowed to set completely.Go Back to Glossary