Acrylic – a favorably priced and versatile material for manufacturing earmolds. Manufacturing earmolds using the cold polymerization procedure is a proven technique for successfully and efficiently manufacturing BTE earmolds, hearing protection and ITE shells of acrylics. In addition, the cold polymerization technique makes producing colored earmolds possible. Hard or soft, slightly colored or completely transparent – with the hot polymerization of acrylics, you can manufacture all kinds of earmolds. Hard and soft materials can also be combined. Using pressure and heat, earmolds with a high degree of hardness can be generated.