gilt and gold jewellery can be cleaned with vinegar, hydrogen peroxide and household ammonia, according to a new study by the World Bank.
The study, published on Tuesday in the International Journal of Cleaner Production, looked at the effects of the four cleaners on the production of diamonds, rubies and sapphires.
The results are an important first step towards ensuring that the jewellery industry is properly regulated, said the World Fund’s chief economist, Rajeev Sharma.
It found that using household ammonia and hydrogen peroxidase (H 2 O 2 ) to clean the jewellers’ jewellery, including the gems and diamonds, reduced the production by about 85 per cent.
These were mainly because the cleaner chemicals are not readily available and because of the high costs associated with the clean-up process.
“If we can provide them with more products that are safe and cheap, we can make a big difference,” Sharma said.
“The cleaner cleaners should be widely available and widely used in the jewelling industry to ensure they have the necessary safety equipment and the right chemical and water to be used,” he said.
The researchers say that the results suggest that household ammonia may be an inexpensive, safe and environmentally friendly way of cleaning jewellery.
The cleaner’s effects are greatest at lower temperatures, when the jeweller can heat the jewlery to a safe temperature to kill any bacteria or fungi.
The cleaning process is more efficient than using water.
This, in turn, increases the jewelers’ production capacity and, ultimately, reduces the overall cost of cleaning.
“In addition, we find that the cleaner is able to clean jewellery more efficiently than water,” the researchers said.
They found that the use of hydrogen peroxygen can reduce the amount of chlorine present in jewellery as well as the level of carbon dioxide and sulphur dioxide in the water.
“A cleaner can remove up to 25 per cent of the chlorine, carbon dioxide, sulphur, and other toxic compounds in water,” Sharma told Al Jazeera.
The Cleaner Cleaner was also effective at removing most of the oil residue left behind by the cleaning process.
The findings suggest that the Cleaner cleaner can also be used to reduce the production and storage of carbon monoxide, a dangerous gas that can kill.
The cleaners are effective at eliminating any residual odour from jewellery after it has been cleaned.
“This can reduce odour, improve the smell of the jewels and also reduce the potential for other chemicals to get into the jewelled objects, like the diamonds,” Sharma added.
The cleaners also remove some of the minerals in the product that could have formed a source of corrosion, he said, while other chemicals such as sulphur can help remove some residual salts.
The scientists have identified other cleaning methods that can be used that don’t involve hydrogen perOXID, such as the use a mild soap and water.