What is a PSA disc and how is it applied?
PSA discs have Pressure Sensitive Adhesive for ease in mounting them to the mounting surface such as the Lap-SharpT interchangeable color coded discs. A protective sheet is applied to the back of the abrasive that is removed to expose the adhesive surface. Only apply PSA backing to clean surfaces, as bumps in the abrasive surface can cause improper operation during the sharpening process. Hold the abrasive in a concave shape when applying the adhesive side to a disc surface. Slowly let the edges down so as to minimize the chance of trapping air bubbles under the abrasive. Using a “J” roller to apply pressure to the abrasive side and working the pressure from center to the outer edges will aid in achieving a smooth application of the abrasive disc.
