Скачать или смотреть What is KDM Jewellery?

#KDM #Jewellery has a sort of history attached to it.
Gold jewelleries get their intricate designs through soldering of different parts together.
As such, the soldering material used should always have a melting point that’s lower than that of gold.
Historically, the solder material had been an alloy of gold and copper with 60% of the alloy being gold and 40% copper.
However, using such an alloy gives more impurities to the gold.
Let’s say you purchased a 22 carat gold jewellery piece that was worked on using this technique.
So when this jewellery is melted when you sell it, you will get a lower purity of gold.
You may have noticed that older jewelleries are certified as 22/20 carat purity, wherein the jewellery at the time of buying was 22 carats purity and after melting it will have a purity of 20 carats.
This is where KDM jewellery comes in.
KDM is an alloy of gold and cadmium with the divisions being 92% gold and 8% cadmium.
This alloy also has a melting point lower than that of gold and maintains the purity of the base jewellery even when melted.
However, KDM jewellery was found to have adverse health impacts on wearers and so the technology was banned and replaced by other advanced alloys.
So, KDM jewellery is technically not being made anymore but the term has caught up with the industry and is being used widely.
In short, KDM jewellery allows you to retain the purity of gold jewellery when you eventually sell it.
#Facts

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