TAPPI TIP 0304-61试图对铜在油墨中的作用、用途及其控制提供基本的了解。由于铜在工厂废水中的存在经常受到当地污水处理部门的监测，因此许多盒子制造商对铜感到担忧。因此，应谨慎行事，因为某些城市的铜排放限值极低。在某些情况下，这些限值小于0.0001%（1.0 ppm）。

TAPPI TIP 0304-61 attempts to provide a basic understanding of the role that copper plays in a printing ink, its use and its control. Copper is a concern to many box makers since its presence in plant effluents is often monitored by local sewage authorities. Therefore, caution should be exercised as the copper discharge limits in certain municipalities are extremely low. In some cases, these limits are less than 0.0001% (1.0 ppm).