What does ipm18k hallmark on bracelet mean?

The "IPM18K" hallmark on a bracelet indicates that the piece is made of 18-karat gold with an ion plating (IP) process. The "18K" signifies that the gold content is 75% pure, while "IP" refers to the ion plating technique used to enhance durability and add color. This hallmark ensures that the jewelry meets certain quality standards in terms of gold content and finish.