Trapping is mandatory and critical in Flexography due to the higher registration errors inherent to the elastic nature of polymer plates. In contrast, in Offset printing, trapping is less common and essential, mainly due to the higher precision of modern machinery and better register control. It is generally only utilized in highly register-sensitive projects or those involving Spot Colors, often to optimize production speed. Our consultant's advice is that when using Spot Colors alongside CMYK process colors, manual trapping often yields the best results. This is because automated systems frequently fail to accurately calculate the complex interaction and blend required between spot and process inks.