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PTR Rifle, PTR-91
PTR can refer to: * Particle transfer roller, for cleaning motion picture film * Peak-to-trough ratio, a parameter in pharmacokinetics * Petir LRT station (LRT station abbreviation), Singapore * PetroChina (NYSE: PTR) * Photothermal Ratio, light/temperature ratio for a plant * Physical transmission right in the electricity market * Physikalisch-Technische Reichsanstalt, later Physikalisch-Technische Bundesanstalt, a German research institute * Pitrilysin, an enzyme * Planar ternary ring in algebra * Pool Test Reactor, Canada * Proton-transfer-reaction mass spectrometry, used in chemical analysis * PTR rifle, made by PTR Industries, Inc., US * List of DNS record types#PTR, A type of DNS record in computer networking * Pointer_(computer_programming), Pointer in computer programming (e.g. the PTR keyword in x86 assembly language) * Palanivel Thiagarajan, an Indian politician * Puerto Rico, ITU country code * Public Test Realm, a server in ''Overwatch'' where updates are tested by develo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Particle Transfer Roller
The particle transfer roller, often abbreviated to PTR, is a device for cleaning film stock, motion picture film. It consists of a cylindrical roller coated with ethyl carbamate, urethane, over which the surface of the film passes. History The particle transfer roller was developed by Eastman Kodak and launched in 1989. It was intended to replace the organic solvents that were the main method of film cleaning before that point. Although their effectiveness is not usually considered sufficient for film laboratory, lab operations, where ultrasonic film cleaner, ultrasonic cleaning with a solvent solution remains the standard, the PTR sold widely for use in projection booths and transfer houses. Use At least two PTRs are needed in the film path – one for the base side and one for the emulsion side – though four are frequently used. A set of PTRs is frequently placed in the film paths of movie projector, projectors, telecine machines, Motion picture film scanner, scanners and Optica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |