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White gold is an alloy of seventy five% gold, four% silver, 4% copper and 17% palladium. The part is carried from the part feeders on both facet of the conveyor belt to the PCB, it is photographed from under.
Its silhouette is inspected to see whether it is damaged or missing , and the inevitable registration errors in pickup are measured and compensated for when the half is placed. For instance, if the half was shifted 0.25 mm and rotated 10° when picked up, the pickup head will adjust the position place to place the half in the appropriate location.
A roll of film consists of the emulsion and base that compose the movie itself, the cassette or cartridge, and outer protective packaging. The materials used to make the emulsion are silver, nitric acid, and gelatin.
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The base consists of cellulose and solvents which are mixed to form a thick fluid known as dope. Film that’s packed in a cassette (35-millimeter film is typically packed this way) requires a metallic spool, the protecting metal canister, and plastic strips at the canister opening where the movie emerges. Other sizes of film together with Polaroid film are shielded from gentle and air by plastic cartridges or packs. Outer packaging, which varies among film products, is created from foil-lined paper, plastic, and skinny cardboard cartons. The outer packaging is also insulating and protects the film from publicity to light, warmth, and air. Alloying gold with other metals adjustments the color of the finished merchandise .