While slittingCutting a wide web into narrower rolls with controlled edge quality, winding tension, and roll build. specifications are very dependant on the raw material input, Advantage ConvertingConverting is the process of transforming raw materials—such as films, foils, papers, foams, fabrics, and adhesives—into finished or semi-finished products through specialized manufacturing processes. has slit down to .020″ width on single-sided pressure-sensitive adhesives and films.