| Back Splits | | Linear slits through the liner put in during coating or converting to meet specialized end-use requirements. |
| Backing | | An inexact term used in the pressure-sensitive adhesive industry. When referencing double-coated tapes and single coated products, it is the release liner. When referencing self-wound tapes, it is the material to which the adhesive is bonded. |
| Basis Weight | | The weight of a ream of paper. Traditional version is given in pounds per ream. The modern version is given in grams per square meter. |
| BG | | Bleached Glassine |
| BI | | Blue image |
| Biaxially Oriented Films | | A film which is extended and stretched in both the machine and cross direction. This stretching improves physical properties over non-oriented polypropylene. |
| Bleed Through | | See PENETRATION. |
| Bleeding | | The undesirable penetration of the adhesive onto the surface to which the tape is applied. |
| Blocking | | Condition where the labels stick to the back side of the liner above them. Usually due to adhesive flow, incomplete die cutting of the adhesive, improper drying of inks or improper drying or curing of coatings. |
| Bond | | The adhesion of a pressure-sensitive adhesive tape to the surface to which it has been applied. |
| Bond Strength | | The amount of force required to separate the joined surfaces. |
| BOPP | | Biaxially Oriented Polypropylene |
| Buckling | | A deformation of a layout of tape which appears laterally across the roll causing an opening between layers. |
| Butt Cut Labels | | Labels separated by a single cross-direction cut to the liner. No matrix area exists between labels. Butt cut labels are not suitable for automatic dispensing. |
| Butt Splice | | A splice made by joining tape end to end without overlapping. The splice is assembled by a thin single coated tape centered on both sides. |