The IMAX format is generically called 15/70 film, the name referring to the 15 sprocket holes or perforations per frame. The film's bulk requires horizontal platters, rather than conventional film reels. IMAX platters range from 1.2 to 1.83 meters (3.9 to 6.0 ft) diameter to accommodate 1 to 2.75 hours of film. Platters with a 2.5 hour feature film weigh 250 kilograms (550 lb). IMAX uses ESTAR-based print film in their 15/70 rolling-loop film projection systems.
Silicon dioxide, also known as silica (from the Latin silex), is a chemical compound that is an oxide of silicon with the chemical formula SiO2. It has been known since ancient times. Silica is most commonly found in nature as quartz, as well as in various living organisms.
Silica is silicon dioxide, and is the most common component of rocks. Different magmas have different amounts of silica in them. High silica magmas are extremely viscous and t â¦ end to erupt explosively.ilica is the mineral quartz (SiO2) and silicon is the element (Si) which is a major rock forming element in Earth's crust, and is therefore found nearly everywhere. Concentra â¦ tions of silica which are mined are usually in the form of quartz sand or sandstone deposits.