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Solutions from pencil erasers to wire brushes and potassium cyanide were all used as cleaning agents with the goal to make the coin look brilliant again. When certified grading came into use in the mid 1980s though, the practice of cleaning coins diminished over time. Most coin experts have since come out against cleaning coins, as doing so can ...
The black money scam, sometimes also known as the "black dollar scam" or "wash wash scam", is a scam where con artists attempt to fraudulently obtain money from a victim by convincing them that piles of banknote-sized paper are real currency that has been stained in a heist. The victim is persuaded to pay fees and purchase chemicals to remove ...
Exonumia, the study of coin-like objects such as token coins and medals, and other items used in place of legal currency or for commemoration. Notaphily, the study of paper money or banknotes. Philately, the study of postage stamps. Scripophily, the study and collection of stocks and bonds
Sonorex ultrasonic cleaner from the 1970s or 1980s Ultrasonic cleaning of a mobile phone. Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US ...
Sonication machines for record cleaning at Swiss National Sound Archives. Sonication is the mechanism used in ultrasonic cleaning—loosening particles adhering to surfaces. In addition to laboratory science applications, sonicating baths have applications including cleaning objects such as spectacles and jewelry.
I served as the cleaning expert at USA Today for over a decade and have tested all kinds of laundry products — from devices that lift stains with ultrasonic waves to detergents for sensitive skin.
Sonochemistry can be performed by using a bath (usually used for ultrasonic cleaning) or with a high power probe, called an ultrasonic horn, which funnels and couples a piezoelectric element's energy into the water, concentrated at one (typically small) point.
Buy Now: amazon.com #8 Keep Your Home Clean With The Mudbuster Portable Dog Paw Cleaner. Review: "Best thing ever during those spring break up and/or thise rainy muddy autumns.I have a golden ...
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