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  2. Pyrography - Wikipedia

    en.wikipedia.org/wiki/Pyrography

    The King Wolf, pyrography on olive wood by Roberto Frangioni Piroritrattista Framàr. Pyrography or pyrogravure is the free handed art of decorating wood or other materials with burn marks resulting from the controlled application of a heated object such as a poker. It is also known as pokerwork or wood burning. [1]

  3. Fractal burning - Wikipedia

    en.wikipedia.org/wiki/Fractal_burning

    A 2020 review noted that the mortality rate of fractal wood burning cases was "significant" and "exceedingly high." [ 7 ] The American Association of Woodturners has, on safety grounds, banned any demonstrations or sales related to the practice at its events, strongly discourages any of its chapters from promoting the practice, and refuses to ...

  4. Edison Disc Record - Wikipedia

    en.wikipedia.org/wiki/Edison_Disc_Record

    In 1926, an attempt at reviving interest in Edison records was made by introducing a long-playing Diamond Disc which still rotated at 80 rpm but tripled the standard groove pitch to 450 threads per inch by using an ultra-fine groove, achieving a playing time of 24 minutes per 10-inch disc (12 on each side) and 40 minutes per 12-inch disc (these ...

  5. Music recording certification - Wikipedia

    en.wikipedia.org/wiki/Music_recording_certification

    The "Diamond Award" granted by the Recording Industry Association of America (RIAA) recognizes 10 million units sold in the United States. Below are certification thresholds for the United States, United Kingdom, Canada and France. The numbers in the tables are in terms of "units", where a unit represents one sale or one shipment of a given medium.

  6. List of music recording certifications - Wikipedia

    en.wikipedia.org/wiki/List_of_music_recording...

    For albums released between September 25, 1999, and December 31, 2002, the thresholds are 150,000 for Gold and 300,000 for Platinum. Also, for Jazz albums, the thresholds are 10,000 for Gold and 20,000 for Platinum. Diamond-award is applicable to titles released on/after January 1, 2013. [18] ^ IV Hungarian sales figures provided refer to "Pop ...

  7. Disc cutter - Wikipedia

    en.wikipedia.org/wiki/Disc_cutter

    Some discs used for cutting ceramic tile or stone are made from a solid disc with an edge coated with diamond grit. The most common size for these cutting wheels is 4 + 1 ⁄ 2 inches in diameter; however they can range from 2 to 16 inches in diameter with a thickness range from .045 in. to .125 in. Type 1 discs are flat, and type 27 discs have ...