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Laser engraving metal plates are manufactured with a finely polished metal, coated with an enamel paint made to be "burned off". At levels of 10 to 30 watts, excellent engravings are made as the enamel is removed quite cleanly. Much laser engraving is sold as exposed brass or silver-coated steel lettering on a black or dark-enamelled background.
The CO 2 laser is suited for cutting, boring, and engraving. The neodymium (Nd) and neodymium yttrium-aluminium-garnet lasers are identical in style and differ only in the application. Nd is used for boring and where high energy but low repetition are required. The Nd:YAG laser is used where very high power is needed and for boring and engraving.
In Europe, Philips also used the "CD Video" name as part of a short-lived attempt in the late 1980s to relaunch and rebrand the entire LaserDisc system. [46] [30] Some 20 and 30 cm discs were also branded "CD Video", but unlike the 12 cm discs, these were essentially just standard LaserDiscs with digital soundtracks and no audio-only CD content ...
Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...
Wood engraving is a printmaking technique, in which an artist works an image into a block of wood. Functionally a variety of woodcut , it uses relief printing , where the artist applies ink to the face of the block and prints using relatively low pressure.
Powerful laser guide star system at the Paranal Observatory. The actual laser guide star is the small spot above the apparent end of the laser beam. A laser guide star is an artificial star image created for use in astronomical adaptive optics systems, which are employed in large telescopes in order to correct atmospheric distortion of light (called astronomical seeing).
Bangkok, [a] officially known in Thai as Krung Thep Maha Nakhon [b] and colloquially as Krung Thep, [c] is the capital and most populous city of Thailand.The city occupies 1,568.7 square kilometres (605.7 sq mi) in the Chao Phraya River delta in central Thailand and has an estimated population of 9.0 million as of 2021, 13% of the country's population.
A 19th-century jail room at a Pennsylvania museum. A prison, [a] also known as a jail, [b] gaol, [c] penitentiary, detention center, [d] correction center, correctional facility, remand center, hoosegow, or slammer, is a facility where people are imprisoned under the authority of the state, usually as punishment for various crimes.