The Rigitone range features four contemporary perforation edge-to-edge white acoustic fabric backing patterns, Rigitone Galaxy, Rigitone Astral, Rigitone Matrix 8mm Round and Rigitone Matrix 12mm Square, each with different percentages of open area to meet most acoustic application requirements. High levels of acoustic absorption are achieved through a combination of perforation patterns and a highly effective black acoustic fabric backing which also prevents dust from the ceiling entering the room and masks the ceiling framework. Rigitone Galaxy is supplied as a 12.5mm thick sheet, 1960mm wide and 1200mm long. An irregular scattered pattern consisting of 8mm, 15mm and 20mm round perforations, providing a 10% open area. The panels are supplied with a white acoustic fabric backing that improves acoustic performance and eliminates dust from ceiling cavities.