3D IML combines MuCell technology with IML label technology to offer a unique visual appearance and soft touch effect to packages, Providing differentiation without changing the container shape. Multi-Sensory Experience The 3D in-mold label is processed with an injection-molded tub made of expanded polypropylene to incorporate selective masking, creating areas without adhesion. The MuCell process controls the introduction of nitrogen into the polymer. Where there is adhesion between the label and the polymer, the nitrogen migrates through both structures. Where there is no adhesion (by design), the nitrogen accumulates between the polymer substrate and the label. The process creates bubble patterns or Braille for a multi-sensory experience.