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.
What is Silica? Silica is a mineral that is prepared from common rocks such as quartz and sandstone and is often used as a remedy in modalities such as homeopathic medicine.Silica tends to be used for healing parts of the body that benefit from the mineralâs innate hardnessâsuch as bones.It is available as a supplement, and is often used for retaining elasticity of the skin. Silica has many other uses as well, including being a primary ingredient in making glass and concrete.ilica tends to be used for healing parts of the body that benefit from the mineralâs innate hardnessâsuch as bones. It is available as a supplement, and is often used for retaining elasticity of the skin.