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  2. How To Clean Copper For Tarnish-Free Shine - AOL

    www.aol.com/clean-copper-tarnish-free-shine...

    Sealed, or lacquered, copper will present as much shinier than raw, or natural, copper—and it's also much easier to clean (tackle sealed copper with a warm, wet dishcloth and dish soap).

  3. Coin cleaning - Wikipedia

    en.wikipedia.org/wiki/Coin_cleaning

    Coin cleaning is the controversial process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers. The subject is disputed among the numismatic community whether cleaning coins is necessary. Those that argue in favor of cleaning are also in dispute on which methods work best.

  4. Conservation and restoration of copper-based objects

    en.wikipedia.org/wiki/Conservation_and...

    The conservation and restoration of copper and copper-alloy objects is the preservation and protection of objects of historical and personal value made from copper or copper alloy. When applied to items of cultural heritage , this activity is generally undertaken by a conservator-restorer .

  5. Conservation and restoration of metals - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Derveni krater, bronze, 350 BC, height: 90.5 cm (35 1 ⁄ 2 in.), Inv. B1, Archaeological Museum of Thessaloniki, after cleaning and conservation. Conservation and restoration of metals is the activity devoted to the protection and preservation of historical (religious, artistic, technical and ethnographic) and archaeological objects made partly or entirely of metal.

  6. Piranha solution - Wikipedia

    en.wikipedia.org/wiki/Piranha_solution

    The resulting mixture is used to clean organic residues off substrates, for example silicon wafers. [1] Because the mixture is a strong oxidizing agent , it will decompose most organic matter , and it will also hydroxylate most surfaces (by adding –OH groups), making them highly hydrophilic (water-compatible).

  7. This best-selling $40 device deep cleans your jewelry in seconds

    www.aol.com/jewelry-cleaning-device-amazon...

    Household products can add to the grimy buildup on your jewelry. Shoppers say this device makes them look "brand new" without the chemicals.

  8. Copper naphthenate - Wikipedia

    en.wikipedia.org/wiki/Copper_naphthenate

    Copper naphthenate is classified by EPA as a general use (i.e., a non-restricted use) pesticide by virtue of its relatively benign toxicity profile. [5] Copper naphthenate is the only non-restricted use wood preservative in widespread use for "heavy duty" commodities such as utility poles, railroad crossties and timbers, pilings and fence posts.

  9. How to invest in copper? 5 ways to buy and sell it - AOL

    www.aol.com/finance/invest-copper-5-ways-buy...

    Here are five different ways to invest in copper and key risks to watch. 5 ways to invest in copper 1. Copper bullion. You can purchase copper bullion just as you would gold bullion, buying it as ...

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