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The coercivity of the mother tape is higher than that of the copy tape, so when the copy tape is heated and brought into contact with the mother tape, the copy tape gets a mirror image of the signal on the mother tape without the mother tape losing its signal. The recording on the mother tape was a mirror image of a valid video signal.
Stacked film cans containing rolls of film. Film preservation, or film restoration, describes a series of ongoing efforts among film historians, archivists, museums, cinematheques, and non-profit organizations to rescue decaying film stock and preserve the images they contain.
First-surface mirrors are now made for applications requiring a strict reflection without a ghosting effect as seen with a second-surface mirror, where a faint secondary reflection could be observed, coming from the front surface of the glass. This includes most optics applications where light is being manipulated in a specific manner.
Ptolemaic Egypt had manufactured small glass mirrors backed by lead, tin, or antimony. [4] In the early 10th century, the Persian scientist al-Razi described ways of silvering and gilding in a book on alchemy, [citation needed] but this was not done for the purpose of making mirrors. Tin-coated mirrors were first made in Europe in the
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Mass backing is the original type of backing that most car makers use. It's thicker and more rubber-like than poly backing. Poly backing is lighter, easier to bend and more mesh like than mass backing. Some molded carpets come with jute backing where your feet rest on the floor pans. This helps prevent the carpet from wearing out prematurely ...