The process involves the production of quinones by the catalytic oxidation of phenol which then polymerize to form melanins which are dark, high molecular weight insoluble polymers.

• 果汁加工过程中苯酚催化氧化形成苯醌，然后聚合形成黑色素。黑色素是一种不能溶解的高分子量聚合体。