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Articles with tag "patina"
Restorers' Secrets: When Intervention Increases and When It Decreases an Item's Value
In the world of antiques, not every aesthetic improvement is beneficial. A prime example is numismatics. Attempting to make an old coin shiny with cleaning agents can reduce its value tenfold or more, or even bring it down to the price of the metal. The reason lies in the patina—a noble layer that forms on the metal's surface over decades and centuries.
expertise
#restoration#antiques#collecting+6
Collector's Terminology: What Are Provenance, Patina, and Grading?
Provenance (from the French provenance — origin, source) is the documented history of ownership of an art or collectible object. It traces the artifact's journey from its creation to its current owner.
collectors-guide
#collecting#antiques#provenance+6
How to Clean a Heavily Oxidized Coin: From Solution to Patina
After being excavated, an ancient coin can be completely unrecognizable. It is often covered with a thick layer of organic deposits, dirt, and dense oxides that hide the relief and metal. In this condition, the artifact requires careful and systematic cleaning.
top-sales
#coin cleaning#restoration#copper coins+1
Collector's Mistakes: Why Cleaned Coins Are a Bad Investment
The path to serious numismatics often begins with mistakes. Initially, it might seem that collecting coins in special plastic capsules, or slabs, is an unnecessary expense. There was a belief that a true collector needed to hold a coin in their hands, to feel its metal and history.
top-sales
#numismatics#coin-collecting#cleaned-coins+5
Patina on Coins: A Collector's Guide
Many new and even experienced collectors wonder what to look for when choosing a coin. One of the most common and complex questions is the evaluation of patina. Is it worth acquiring a coin with patina, how does it affect its value, and what potential pitfalls might be associated with it?
collectors-guide
#numismatics#coin-collecting#patina+6
A New Level of Forgery: How to Identify Dangerous Copies of 18th-Century Coins
Simple and primitive copies of ancient coins are being replaced by more dangerous forgeries. These specimens are made at a high level and can be found both online and in the trading stalls of clubs and antique shops.
expertise
#numismatics#coin-forgeries#counterfeit-coins+6