18K gold may fade when it comes into contact with perfume, because the chemical components in perfume may react with the metal components in 18K gold, resulting in fading. However, the current 18K mixed gold technology has become more and more exquisite, and the hardness and stability have been improved, so the probability of chemical reaction is also low. Therefore, you can generally wear it with confidence and will not fade easily.
If you want to avoid fading, you can regularly clean 18K gold jewelry with mild soapy water, and make sure that the jewelry does not touch articles containing chemical components, such as perfume and hair wax. You can also go to a professional jewelry store to maintain the luster and color of the jewelry.