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A TRS-80 Color Computer showing significant yellowing The same computer after treatment, showing yellowing largely reversed. Retrobright (stylized as retr0bright or Retrobrite [1]) is a hydrogen peroxide-based process for removing yellowing from ABS plastics.
A bright dot defect or hot pixel is a group of three sub-pixels (one pixel) all of whose transistors are "off" for TN panels or stuck "on" for MVA and PVA panels. [2] This allows all light to pass through to the RGB layer, creating a bright pixel that is always on.
Tile, including ceramic tile and stone tile, is installed in much the same way as floor tiles or wall tiles through the use of mortar and grouting the tile gaps after they have been cemented down. The tiles that sit on the wall typically behind a countertop are called a backsplash .
Mineral fiber tiles are fabricated from a range of products; wet felt tiles can be manufactured from perlite, mineral wool, and fibers from recycled paper; stone wool tiles are created by combining molten stone and binders which is then spun to create the tile; gypsum tiles are based on the soft mineral and then finished with vinyl, paper or a ...
Severe fluorosis is characterized by brown discoloration and discrete or confluent pitting; brown stains are widespread and teeth often present a corroded-looking appearance. [ 1 ] People with fluorosis are relatively resistant to dental caries (tooth decay caused by bacteria), [ 2 ] although there may be cosmetic concern. [ 2 ]
Carotenosis is a benign and reversible medical condition where an excess of dietary carotenoids results in orange discoloration of the outermost skin layer. The discoloration is most easily observed in light-skinned people and may be mistaken for jaundice.
Most extrinsic discoloration is readily removed by cleaning the teeth, whether with "whitening" (i.e., abrasive) toothpaste at home, or as treatment carried out by a professional (e.g., scaling and/or polishing). To prevent future buildup of extrinsic stains, identification of the cause (e.g., smoking) is required.
This type of tile was named for the Qallalin district of Tunis, where they were most commonly produced. [ 1 ] : 223–224 [ 2 ] : 84 Although their production may have started as early as the 16th century, prior to the advent of Ottoman rule , the height of their production and artistic quality was in the 17th and 18th centuries.