Once you've learnt the process, you can use the skill again and again, meaning that tarnished ... silver (which is 92.5% pure silver and 7.5% composite material, such as copper). Getty Images ...

Tarnished silver jewellery can be restored to gleaming brilliance by soaking it in bicarbonate of soda and boiling water in a bowl lined with tinfoil, a mother has revealed. After her sterling ...