This soft, malleable, ductile metal has a brilliant sheen when well polished.
Small amounts of the metal in elemental form occur naturally in the earth, but most of the silver we use is extracted from silver ores.
Silver is chemically unaffected by pure water, pure air, and a majority of food stuffs, but gets scratched easily if pure.
Silver is used as the plating in electroplated nickel silver, for making cutlery, utensils, vases, and decorative artifacts.
Types of Silver
Sterling Silver Silver-Plated (EPNS)
Sterling Silver
Sterling silver is an alloy containing 92.5 per cent silver, and the rest is mainly copper.
Sterling silver is more expensive than silver-plated alloy and for this reason is seldom used in hotels.
Silver-Plated (EPNS)
…show more content…
When it gets tarnished, more complex cleaning methods have to be employed.
Following are the cleaning & polishing methods for silver:
Regular Cleaning Silver Dip Polivit or Aluminium-Soda method
Burnishing Machine Plate-Powder Method
I. Regular Cleaning
• Wash the article in a hot solution of synthetic detergent, scrubbing with a piece of cotton cloth.
• Then rinse in clean boiling water in an enameled tray.
• A sheet of alunimium and some soda can be placed in the tray.
• Once the articles are clean, drain the water away and wipe dry while it is still warm, rubbing hard with a lint-free linen cloth or chamois leather.
II. Silver-Dip Method
• A silver dip solution is used when tarnished silver is to be cleaned.
• It is usually a pink coloured liquid based on an acid solution of a compound into which the articles are immersed completely for removal of tarnish.
• The silver should remain in the liquid for a very short time, the articles should be lifted out, washed with warm water and dried.
• While working with silver dip, stainless steel containers should not be used since the dip attacks
…show more content…
Source: https://www.google.co.in/search?q=Polivit+Method+cleaning&espv=2&biw=1366&bih=662&source=lnms&tbm=isch&sa=X&ved
III. Polivit Method
• Polivit is an aluminium metal sheet containing holes, which is best used in an enamel bowl or galvanized iron bowl.
• The polivit is placed in the bowl together with some soda.
• The silver to be cleaned is then put into the bowl, ensuring that at least the one piece of silver has contact with the polivit.
• Sufficient boiling water is poured into the bowl to cover the silver being cleaned has contact with the polivit.
• A chemical reaction takes place between the polivit, soda, boiling water and silver which causes the tarnish to be lifted.
• After 2-4 minutes, silver should be removed from the bowl and placed into the 2nd bowl of boiling and then rinsed.
• On removal from the second bowl the silver is allowed to drain and then polished with a clean cloth and then dried with a tea cloth.
Source: https://www.google.co.in/search?q=Polivit+Method+cleaning&espv=2&biw=1366&bih=662&source=lnms&tbm=isch&sa=X&ved
IV. Burnishing
...ost likely to be battery acid. If it is water, it has a Ph level of around 7. For vinegar, the Ph level is approximately 2.4 - 3.4. Thus, once testing the liquid compare it with the Ph levels above to discover the mystery solution.
7.) After you have heated them to the right temperatures, pour the excess water into a dry evaporating dish. ( Be sure not to get any of the substance in your solution. )
Silver has always been around but it wasn't until the 1500's to the mid 1700's that the
· Rinse out mixture in flask and leave water running to get rid of the
2. Clean the surface of a 20 cm strip of magnesium ribbon using steel wool
· If spilt on clothes or skin, wash with water to prevent harm to the
-Discuss the silver vs. gold argument, listing at least one argument for silver and one argument for gold.
isn’t an ornate silver tea set that requires careful polishing, it probably needs to be
2. Gently was fruit in cool, soapy water, using a scrub brush on the citrus fruits, then rinse thoroughly with cool running tap water.
2. Step 2: Heat the mixture: Make sure the agarose dissolves. Wait until it boils and when you are going to transfer the mixture, wear gloves to avoid getting burnt. Transfer the mixture to a removable gel tray. 3.
Aluminum is the most abundant metallic constituent in the crust of the earth; only the nonmetals oxygen and silicon are more abundant. Aluminum is never found as a free metal; commonly as aluminum silicate or as a silicate of aluminum mixed with other metals such as sodium, potassium, iron, calcium, and magnesium. These silicates are not useful ores, for it is chemically difficult, and therefore an expensive process, to extract aluminum from them. bauxite an impure h...
Silver is one of the most valuable precious metals due to its tangible and secure nature. One of the factors why you should purchase silver bullion over others is that the coins are small making them easy to store. In addition, they are cost-effective when considering adding them to investment portfolios. The silver bullion consists of seven types:
1000 series: this type of aluminium is used for construction and contains less than one percent additives. It is used to make sheet metal and foil and is not heat treatable but can be strengthened through work hardening. A process of beating, stretching and bending to inc...
Electronics industry has a steady gold demand because it is required for making televisions, computers, phones and other electronic devices. The metal has unique properties that gives excellent corrosion resistance and electrical conducting qualities, needed for creating complex electronic circuitry.
• Clean all pacifiers and bottle nipples in hot water or a dishwasher after each use.