Firstly, the “k” in “14k” or “16k” refers to the karat weight of the gold used in the plating process. A higher karat weight indicates a higher percentage of pure gold in the plating solution. 18k gold plating contains a higher percentage of pure gold, which means that it is more resistant to tarnishing and fading over time. Secondly, 18k gold plating is thicker than 14k and 16k gold plating. This means that the layer of gold on the jewellery is more durable and less likely to wear off over time. Thicker plating also means that the jewellery will maintain its luxurious and high-end appearance for longer. Lastly, 18k gold plating tends to have a richer and more vibrant colour than 14k and 16k gold plating. This is because 18k gold contains a higher percentage of pure gold, which gives it a deeper and more lustrous hue.