1973년 발행 옛날 100원 동전 미사용 세척 주화

1973년 발행 100원 미사용급 주화입니다. 소장본은 발행 50년이 넘어감에도 미사용 상태를 간직한 좋은 상태입니다. 세척 또는 보존처리(Polish)으로 추정되는 흔적이 있습니다. 미사용 회전광이 남아있고 인위적인 흔적은 없어, 녹과 스크래치를 발생시키는 형태의 세척은 아닌 것으로 보입니다. 시중 가격의 절반 이하로 드리니 마모가 전혀 없는 미사용급 주화를 보기 좋은 상태로 간직하고 싶은 분들께 추천드립니다. TMI 세척주화가 인위적인 광을 만들어 수집인구에 따라 호불호가 갈리기는 하지만, 모든 세척주화가 주화를 손상시키는 것은 아닙니다. 참고해볼 만한 글입니다. Cleaning Coins Many numismatists believe that coins should never be cleaned. They prize the patinas, toning, and tarnish that can occur on the surface of a coin over time. Toned or tarnished silver coins are particularly valued. Toning is the corrosion product silver sulphide, which can appear in colours ranging from yellow and red through to blue and black. The thickness of the film (i.e. thin film interference) determines what colour is seen; essentially, the thicker the film, the darker the colour. In general, removing corrosion from the surface of a coin should be left to a conservator. Coins can be washed, however, to remove surface dirt and contaminants such as oils, salts, and acids deposited from handling. Washing does not affect any underlying patina. It is advisable to wash and degrease all coins before placing them in holders, even if they do not appear dirty. Procedure Ensure the work area is well ventilated. Wash the coin in lukewarm distilled water using diluted mild soap (under no circumstances should powdered dishwasher detergent be used). Take care not to scrub the surface of the coin. Rinse in distilled water. Degrease and dewater the coin by soaking it in acetone. Allow the coin to air-dry on a paper towel. Coin dips and metal cleaners (cloths, wadding, and liquids or pastes) should not be used to clean coins. Coin dips contain acids that, if left on the surface through insufficient rinsing, can lead to degradation. Most metal cleaners contain abrasives that can scratch the surface of a coin.