 | Pallet | | A portable platform device onto which paper can be loaded for storage and/or transporting. |
| Paper | | A homogeneous formation of primarily cellulose fibers which are formed in water suspension on the machine wire and bound together by weaving of the fibers and by bonding agents. |
| Pattern Coating | | Refers to the width and spacing arrangement of adhesive laid down parallel to machine direction, across the width of a pressure-sensitive stock, during its manufacturing. |
| Pattern Gum | | An adhesive coating that alternates strips of adhesive/no adhesive parallel to the machine direction. The areas of no adhesive are frequently used as "lift-tabs" for order-picking type labels. |
| Pattern Release | | Selectively applying alternating strips of release coating/no release coating in a machine direction pattern that results in a permanent facestock/release liner bond in the non-release coated areas. |
| PCW | | Post Consumer Waste |
| PE | | Polyethylene |
| Peel Adhesion | | Adhesion strength. Peel adhesion is the force required to move a pressure-sensitive label from a standard test panel at a specified angle and speed after the label has been applied to the test panel under specified conditions. |
| Penetration | | Bleed through. Change of appearance of the face material due to movement of one or more components from the adhesive or the substrate. |
| Perforation | | Series of small cuts made in labels and/or their release liner to facilitate tearing along a predetermined line. |
| Permanent Adhesive | | An adhesive characterized by having relatively high ultimate adhesion to a wide variety of surfaces. |
| PET | | Polyester |
| Pick | | That quality of paper as it relates to the tendency of fibers or particles to be pulled away from the sheet surface when removed from tacky surfaces such as printing plates. |
| Picking | | The lifting of the paper surface during printing. It occurs when pulling force (tack) of ink is greater than surface strength of paper. |
| Pigment | | In printing inks, the fine solid particles used to give color, body or opacity. |
| PK | | Poly Kraft |
| PLA | | Polylactic acid |
| Plastic | | One of many high-polymeric substances, including both natural and synthetic products, but excluding the rubbers. Plastic is capable of flowing and pressure or tensile stress, if necessary, into the desired final shape. |
| Plasticizer | | Softener. A substance added to materials to impart flexibility, workability and elongation. |
| Plasticizer Migration | | Loss of plasticizer from an elastomeric compound that is absorbed into the adhesive. The result is a softening of the adhesive to the point of adhesion failure. |
| Plate Cylinder | | The cylinder of a press on which the plate is mounted. |
| Pli-A-Print | | Latex-impregnated, flexible stock suitable for exposure to moisture. |
| Polyester | | A strong film having good resistance to moisture, solvents, oils and many other chemicals. It is usually transparent. |
| Polyethylene | | An extruded, tough stretchy film having limited temperature resistance but good moisture barrier properties. |
| Polymer | | A complex, relatively large, molecule produced by the reaction of a simpler compound with itself. Usually refers to synthesized organic resins, but may also refer to natural materials, such as starch, sugar, cellulose, and natural rubber. |
| Polymerization | | The chemical reaction by a catalyst, heat, light or electron radiation in which relatively small molecules link up to form a macromolecule. |
| Polypropylene | | A polyolefin plastic similar in properties to polyethylene but with higher temperature capability and greater strength. |
| Polystyrene | | A water-white thermoplastic produced by the polymerization of styrene. The electrical insulation properties of polystyrene are outstandingly good and the material is relatively unaffected by moisture. |
| Polythene | | Trade name for polyethylene available in films or as custom molded articles. |
| Porosity | | The density of the adherent surface, the property of adhesive absorption by the adherent surface. |