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Sub-surface laser engraving is the process of engraving an image in a transparent solid material by focusing a laser below the surface to create small fractures. Such engraved materials are of high-grade optical quality (suitable for lenses, with low dispersion) to minimize distortion of the beam. BK7 glass is a common material for this ...
The writing slate consisted of a piece of slate, typically either 4x6 inches or 7x10 inches, encased in a wooden frame. [1] Split slate was prepared by scraping with a steel edge, grinding with a flat stone and, finally, polishing with a mix of slate powder in water. Pencils were of a softer stone, such as shale, chalk or soapstone. [2]
It was widely used in engraving during the 1980s and 1990s and continues to have a small, dedicated following of engravers, many of whom hold the program in high regard due to its ability to position symbols precisely on the page. Several publications set using SCORE have earned Paul Revere and German Musikpresse engraving awards.
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 ...
The slate and stylus are tools used by blind people to write text that they can read without assistance. [ 1 ] [ 2 ] Invented by Charles Barbier as the tool for writing letters that could be read by touch, [ 3 ] the slate and stylus allow for a quick, easy, convenient and constant method of making embossed printing for Braille character encoding .
"The New Colossus" is a sonnet by American poet Emma Lazarus (1849–1887). She wrote the poem in 1883 to raise money for the construction of a pedestal for the Statue of Liberty (Liberty Enlightening the World). [2]
This page shows the 50 accounts with the most followers on the social media platform Instagram, with each amount rounded down to the nearest million followers. [1] The most-followed account is Instagram's own account.
The Visscher panorama is an engraving by Claes Visscher (1586-1652) depicting a panorama of London. It shows an imagined view of London in around 1600. The engraving was first published in Amsterdam in 1616, with the title "Londinum Florentissima Britanniae Urbs Toto Orbe Celeberrimum Emporiumque".