Rolling

Northwest Territorial Mint: Rolled Sheet
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Strips Are Rolled

Once the long, thin strips of extruded metal have cooled, they are trimmed using a hydraulic shearer and prepared for rolling. A highly precise instrument called a micrometer is used to calibrate the precise thickness of each strip of metal. Next, the strips are individually fed into a high-pressure rolling machine and gathered for the next step in the process. After each strip has been rolled, it is inspected to ensure that it meets the specifications for thickness.

After the strips have been rolled, they are then sent to the blanking machine.

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Northwest Territorial Mint: Insights & Ideas
Insights & Ideas
Hot Topic: One Sided?

Having a coin made for mounting? This stagecoach bar was made for mounting on the front cover of a large coffee table book. The blanks for this were made from strips of .999 silver that were much thinner than a two sided bar. The reverse was left blank. Such an approach can be done for a wide variety of presentations.

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Northwest Territorial Mint: In The News

Chemistry of Gold Plating

Northwest Territorial Mint: Did You Know?There are five recognized classes of gold plating chemistries: Alkaline gold cyanide (for gold and gold alloy plating), Neutral gold cyanide (for high purity plating), Acid gold plating for bright hard gold and gold alloy plating, Non-cyanide (generally sulfite based for gold and gold alloy plating) and miscellaneous other methods not using any of the above chemistries.