ccd thickeners for reliable and efficient operations. we have the experience and expertise to design the most reliable and cost effective counter current decantation (ccd) circuit for your leaching, clarifying or metal recovery application. flsmidth ccd thickener design provides process flexibility to meet the challenges of todays demanding,choosing and troubleshooting copper electroplating,feb 22, 2011 pyrophosphate copper. the main use of pyro copper is plating of printed circuit boards. the bath has good throwing power, obtaining surface-to-hole ratios of 11 on many pc boards. some federal agencies specify pyro copper where ductility of the deposit is very important. it is also used for general plating, electroforming and plating on plastics.