以下是引用sailfly999在2011-4-5 19:40:00的發言：

NCS錢幣保養服務（可升首次翻譯版請指正）

NCS錢幣保養服務

（可升首次翻譯版請指正）

隨著評級幣的逐漸普及，很多童靴已經了解PCGS和NGC等評級機構的運作，但是在送評之前，由于品相的原因，其實還可以先送到NCS進行錢幣保養，有機會提高品相。以下文章摘自NCS官方網站有關介紹，偶翻譯成中文以便說明，由于水平有限，初步翻譯難免有錯誤的地方，歡迎提出寶貴意見，偶也可以多學習，謝謝！

可升于香港
2011-4-4

NCS accepts for evaluation all certified or raw coins, tokens and medals. NCS can remove contaminants such as PVC, soils, tarnish, carbon spots, verdigris and encrustation from the surface. NCS does not perform repairs or mechanical alterations of any kind. Removing detrimental material from the surface of an item may dramatically improve its appearance and eye appeal. This service is designed to further preserve the originality of the material only and prevent the damage that can result from contamination that is left untreated.
NCS接受對所有評級幣、章或裸幣、章送往評估，NCS可以從幣面上移除PVC（聚氯乙烯）、泥土、沾污、碳斑、銅綠、水銹等沾染物，NCS不會對錢幣進行任何機械性修補（見后文），從幣面上移除這些有害物質可能顯著的改善幣的外觀和品相。這項服務也可以進一步保護原本的材質，避免因為任何沒有處理的沾染物繼續侵害錢幣。

BENEFITS OF NCS CONSERVATION
NCS錢幣保養的優點

Rare coins are like no other collectible. Steeped in history, each possesses a unique background and historical context that captures the imagination. First-time enthusiasts, serious collectors, and professional coin dealers, all involved in numismatics, find great excitement in discovering the qualities that make each coin special.
稀有硬幣和其他收藏品截然不同，走進歷史，每一枚幣都擁有獨特的背景和歷史文化。不管是首次收藏迷、嚴肅的收藏家或者專業幣商，所有在錢幣界的人士都可以在發掘一枚幣的特色時得到很大的滿足。

Over time a coin can change in appearance due to environmental conditions, mishandling and natural forces of decay. You can take an active role in preserving coins for future generations to admire by contacting Numismatic Conservation Services (NCS) so that NCS’ specialists may assist quickly in identifying damaging conditions, and professionally conserve and stabilize your coins.
隨著時間遷移，一枚幣可能因為環境因素、錯誤的處理或者自然損毀而改變其外觀。聯系NCS（錢幣保養服務）可以主動保護你的硬幣，NCS專家會協助迅速的判斷損毀程度，并專業的保養和穩定你的硬幣。

The expertise of NCS technicians has long been needed in numismatics. Not to be confused with undesirable cleaning, proper numismatic conservation involves examination, scientific analysis and a reliance upon an extensive base of numismatic knowledge to determine the nature of a coin’s state of preservation and the extent of any damage. NCS is uniquely qualified to meet the conservation needs of the hobby.
錢幣收藏界極需要像NCS技術人員的專業能力，不同于不受歡迎的清理，合適的錢幣保養包括檢查、科學分析和依靠強大的錢幣知識來判斷錢幣狀態和任何損毀的程度，NCS具有獨特的服務以滿足有關保養的需求。

The Nature of Coins
錢幣性質

Eight metals are primarily used in minting coins, tokens and medals: platinum, gold, silver, copper, aluminum, zinc, tin, and nickel. Platinum and gold are considered to be durable and stable but not impervious to damage. Silver, copper, aluminum, zinc, tin, and nickel are more susceptible to environmental damage to their gold counterparts, with tin being the least stable metal. Most coins are made of alloys. Gold and silver, for instance, are usually alloyed with copper. Metals may corrode when in contact with acidic materials and excessive moisture and heat. The effects of corrosion appear differently on each metal or alloy. Tin becomes white and scaly, and may crumble away in your hands.
八種金屬經常被使用來鑄造幣章：鉑、黃金、銀、銅、鋁、鋅、錫、鎳，鉑、黃金被認為是耐用和穩定的，但不能避免損壞。銀、銅、鋁、鋅、錫和鎳等，相對于黃金來說，更容易受到環境的影響而損壞，其中錫屬于最不穩定的金屬。大多硬幣均由合金制造，比如黃金幣和白銀幣通常含有一定的銅。當接觸到酸性物質或過量的濕度和熱力時，金屬可能產生腐蝕，其腐蝕的效果在不同金屬或合金上不盡相同，錫會產生白色的鱗狀銹，并在你的手中碎裂。

Light surface corrosion, or toning as it’s described in the numismatic community, can be very desirable. Collectors often prize it as one indicator of a coin’s originality, or closeness to its original state. Toning causes copper coins to turn brown, and silver and nickel coins to develop hues of blue, red, green, purple, and other colors. Often, these coins need little or no conservation; however, advanced stages of corrosion can damage a coin’s surfaces. If the toning process goes too far, the coins turn black and the actual surface of the coin may be ruined forever.
輕度表面腐蝕，或者稱為“年久變色”（也稱氧化/包漿）可以是很受錢幣界歡迎的，收藏者認為這種銹色顯示了幣的原始狀態。氧化可導致銅幣變成褐色，銀、鎳幣則發展成藍、紅、綠、紫和其他顏色，通常這些幣只需要很少的（甚至不需要）保養，但是，更深的銹蝕會損壞幣的表面，如果氧化過程進行的太快，錢幣會變成黑色，幣的表面也會被永久破壞。

Professional coin conservators are no less skilled and responsible than conservators in other fields, so it is time to re-evaluate the cleaning and conservation of coins in this new light. Cleaning removes dirt and agents that hide or might be harmful to an object’s natural and original state. Proper cleaning takes into account original materials and finishes. It studiously avoids damaging original materials and finishes. The overall appearance is enhanced and the coin is more likely to last.
專業錢幣保養師的技巧和責任心并不比其他領域的人士差，因此，現在可以重新評估錢幣的清理和保養需求。清理可以清除掉可能對幣的自然和原始狀態有害的污垢等物質。合適的清理需要考慮原來的材質和拋光，并刻意的避免損壞。整體外觀因此得以提升，
而硬幣也更能持久保存。

The professionals at NCS are skilled in conservation techniques that can prolong the life of the coins in your collection and, as a side benefit, often enhance their appearance. Combining knowledge of materials science with extensive numismatic experience, they strive to the fullest extent possible to return your coin to its original appearance.
NCS專業人員精于保養技術，這可以延長幣的生命，作為一種附加值，通常也提升了他們的外觀。結合材料科學的知識和大量錢幣知識，他們盡最大努力以還原你的硬幣到原本的外觀。

Sometimes confusion arises about the term "conservation." Numismatic conservation involves examination, scientific analysis, and a reliance upon an extensive base of numismatic knowledge to determine the nature of a coin’s state of preservation and the extent of any damage. Conservation also encompasses appropriate procedures to protect the coin’s original appearance and to guard against future deterioration to whatever extent possible.
有時候客戶會對“保養”一詞產生誤會，錢幣保養包括檢查、科學分析和依靠強大的錢幣知識來判斷錢幣狀態和任何損毀的程度，保養同時包含了采取適當措施以保護硬幣的原本外觀，并盡量防御將來的敗壞。

Professional conservation should not be confused with "Coin Doctoring", in which an attempt is made to improve the appearance and grade of a coin through deceptive means such as artificial toning and where unaccepted or unorthodox methods are employed. Also not qualifying as conservation is restoration where mechanical repairs are made such as filling holes, smoothing out scratches, and re-engraving of detail. It is essential to speak with an NCS professional:
專業保養也不應該和“錢幣治療”混淆，其嘗試使用欺騙性的手段如人工氧化或其他不被認可的、非正統的方法以改善錢幣外觀和評分。另外，錢幣修補也不等同于錢幣保養，其使用填補空洞、磨平劃痕、重刻圖案細節等機械性修補。
以下情況可以向NCS專業人員咨詢：

when you notice changes in a coin, such as discoloring or spotting
當你注意到一枚幣的改變時，如變色或出現斑點等
before you try to conserve a damaged coin yourself
在你嘗試自己保養一枚受損錢幣之前
if your coin has been subjected to extreme environmental conditions
如果你的錢幣曾遭遇到極端的環境條件影響
after you have submitted a coin to a grading service and had it returned with a "no grade" designation for certain reasons such as "PVC," "artificial toning" or "Residue."
在你呈報一枚幣到評級服務后，被退回來不予評級，其原因是由于“PVC”、“人工氧化”、或“殘余”的

相關參考鏈接：
http://www.ncscoin.com/conservation/index.asp

輕度表面腐蝕，或者稱為“年久變色”（也稱氧化/包漿）可以是很受錢幣界歡迎的，收藏者認為這種銹色顯示了幣的原始狀態。氧化可導致銅幣變成褐色，銀、鎳幣則發展成藍、紅、綠、紫和其他顏色，通常這些幣只需要很少的（甚至不需要）保養，但是，更深的銹蝕會損壞幣的表面，如果氧化過程進行的太快，錢幣會變成黑色，幣的表面也會被永久破壞。被退回來不予評級，其原因是由于“PVC”、“人工氧化”、或“殘余”的。

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NCS錢幣保養服務（可升首次翻譯版請指正）

4月5日行情直播互動交流