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It was incorporated in 1866 as the J. Manz Engraving Company by Jacob Manz, [1] [2] who was the company president, [3] and was built in 1867 in Chicago to act as a wood engraving business. [4] The company moved to premises at 4001-43 Ravenswood av. in Chicago in 1908, just after it merged with The Hollister Press. [ 5 ]
Jacob Manz was born in Marthalen, Switzerland on October 1, 1837, the oldest son of Jacob Manz, Sr. [2] He had been apprenticed to a firm for wood engraving in Schaffhausen, where he stayed until he was sixteen years old. Through the dissolution of partnership of his employers, he was unable to finish the prescribed term of his apprenticeship ...
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.
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As of 2010, coins manufactured in China and South Korea typically cost between US $2.50 to US $7.00 per coin, depending on production process and complexity of design, laser engraving, enamels, voids, etc. The dies must be sculpted by an artist and can range in cost from US$50 to US$300, depending on complexity.
The earliest players employed gas helium–neon laser tubes to read discs and had a red-orange light with a wavelength of 632.8 nm, while later solid-state players used infrared semiconductor laser diodes with a wavelength of 780 nm. In March 1984, Pioneer introduced the first consumer player with a solid-state laser, the LD-700.
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