The 800 mark on silver refers to the purity of the metal. Pure silver has a 1,000 grade value. Silver with an 800 grade value is a silver alloy containing 800 parts silver and 200 parts other metals.
This type of silver is sometimes known as coin silver. This grade of silver is not considered good enough for most jewelry-making purposes, although it was used in the 19th and early 20th centuries to make jewelry in continental Europe. It has not been used as jewelry-grade silver in the United States. Silver with an 800 grade is, however, used in silver plating because it can withstand a high firing temperature.Learn More
When metal is heated, the atoms begin to vibrate. This increased motion causes the atoms to move farther apart. When the atoms move farther apart, the metal expands. This tendency for metals to expand when heated is called thermal expansion.Full Answer >
Copper is a highly conductive, ductile metal. The metal is soft and malleable, although it does possess a great deal of tensile strength. This means that copper is easily formed by hand, but it is not suitable for building structures.Full Answer >
One of the easiest ways to tell if an object is gold or brass is to look at the size. Most large objects are not made of gold.Full Answer >
Silver is electroplated using electrolysis. A piece of silver metal is placed at the anode end, and the object to be plated at the cathode end, of a power source. These are both placed in water, and the electric current causes silver ions to enter solution in the water, travel to the cathode object, and adhere to the surface as metallic silver.Full Answer >