Criminal court sentences 4 to death for killing 3 policemen in 2016 robbery    ITIDA, RiseUp announce African App Launchpad competition prizes worth $60,000    Liverpool games at Club World Cup moved to new Qatari venue    The role of academic institutions in culture industry discussed at Alexandria Theatre Festival    Even being big, burly one needs his mother    OPEC, allies agree to deepen oil output cuts    Iran ballistic activities do not conform with U.N. resolution: France    Iraqi officials raise death toll to 25 protesters killed    Lebanon's journalists suffer abuse, threats covering unrest    Tottenham must fix leaky defence and stop cheap goals: Mourinho    Kenya police officers among eight killed in bus attack    Riyadh's public transport project to be ready mid-2020    White House will not participate in Trump impeachment hearing    Live score: AFC Bournemouth v Liverpool (English Premier League)    Egypt Zamalek's new coach eyes winning start in Champions League against 1º de Agosto    Egypt's Cabinet denies reports on increasing Jan. train fares    Gold drops 1% after robust U.S. jobs data    Asian markets climb ahead of U.S. payrolls data    WHO decries "collective failure" as measles kills 140,000    Egypt, Italy foreign ministers discuss bilateral ties, regional issues    Egypt's exports of jewelry, precious stones hit $1.6 bln in 10 months: ECBM    The monster that created Michelangelo's sins    First flight attendant with Down syndrome leads crew on International Day of Disabled Persons    Egypt's PM meets Al-Futtaim group CEO, asserts gov't support for real investments    Things to do to receive 2020 feeling better    Mohamed Salah, Zamalek's Hamed represent Egypt in shortlists for CAF awards    Rate of HIV infections in Egypt around 0.02% – minister    Adam Sandler threatens to make ‘so bad' movie if he doesn't win Oscar    Egypt's Tahrir Square among top Reuters photos of a decade    Ahly labour to Egypt Cup win over second-division Beni Suef    Gearing up for the World Youth Forum    In charge of the news    
Don't miss Miami Theatre's new theatrical production Rasayal Ala'oshaq    Shaaban Abdel Rahim, passed away aged 62 years    Egypt names 16 new governors ahead of anticipated Cabinet reshuffle    Egypt's MPs back potential return of information minister post in expected reshuffle    Court sentences six to death, 41 to lifetime imprisonment violence related case    Trump says he would release Mideast peace plan after Israeli elections    ACWA Power compares 3 bids to supply production units for Luxor power station    What do you know about gold alloying?    NBE announces EGP 2.5m prizes for handball youth teams for their world achievements    Jennifer Lopez evokes Egyptian outrage post her North Coast performance    Al-Sisi honours Egypt's scholars on Science Day    IS claims responsibility for suicide bombing killing 63 in Afghan wedding    Political parties gear up for parliamentary, senate, local elections    Unprecedented Glory: Egypt win Men's U-19 World Handball Championship    12th National Egyptian Theatre Festival fuel up public theatre art scene    Ministry of Environment has a plan for "black clouds season"    

Thank you for reporting!
This image will be automatically disabled when it gets reported by several people.

What do you know about gold alloying?
Published in Daily News Egypt on 19 - 08 - 2019

Pure gold has the consistency of a paste, so jewellery manufacturers add other metals to it, like copper and silver, in a process known as alloying, to give it a firm shape that can be formed into commercially usable and uneasily broken objects.
You know your gold jewellery is 14k, or 10k, or one of the other many popular karat weights that exist, but what does it all mean? It all has to do with the amount, percentage to be precise, of pure gold content alloyed into jewellery. Karat is a measure of gold fineness. Put simply, a gold karat is 1/24 part, or 4.1667% of the whole, and the karat weight indicates how many parts of gold are in a piece.
Nady Naguib, the former secretary of the Gold Traders Division at the Federation of Egyptian Chambers of Commerce (FEDCOC) and secretary of the Association of Gold Manufacturers and Traders, said that alloying is responsible for determining the gold fineness. For example, 24k gold is 100 parts gold or 100%. 16k gold is 16 parts gold to 8 parts of other materials for a pure gold percentage of 67%
He explained to Daily News Egypt that silver and copper are part of the gold industry for two reasons, the first is because they give gold solidity to be formed into various objects that can be traded in the market and be usable for commercial use, as pure gold is difficult to wear. The second reason is to give gold a silver colour. Platinum and silver give gold a whitish look and copper gives it a bit of a yellow or red colour.
Naguib added that copper and silver alloying represents 125 grams in 1kg of 21k gold, and 250 grams in 1kg of 18k gold.
He pointed out that alloying gold with copper only results in a reddish colour, while the yellow colour is produced by alloying gold with two-thirds of an amount of copper equivalent to 83.3 grams in 1kg of the 21k gold and 166.7 grams in 1kg for 18k gold.
Naguib noted that the high prices of copper and silver or the shortage of supply increases the value of gold craftsmanship because they are important elements within the gold industry.
He added that a large amount of gold works in markets are recycled 21k and 18k gold. They are used in creating new products, which reduces alloying copper and silver in gold manufacturing.

Clic here to read the story from its source.