PCB and the Paper Industry—A Progress Report

The paper industry's experiences with PCBs were chronologically reviewed at a recent "PCB Workshop" sponsored by the Grocery Manufacturers of America, Inc. (1). This history goes back somewhat over a year, at which time two paperboard manufacturers were apprised of the presence of PCBs in folding cartons for packaging dried fruit. These two manufacturers immediately began searching for the source of the PCB contamination, screening all converting materials used in making cartons from the paperboard. These materials, including printing inks, varnishes and adhesives, proved not to be the source of the contamination. Examination of the fibrous materials used in the paperboard showed the source of PCB contamination to be some of the paperstocks used in manufacturing the paperboard. Certain high quality white and colored paperstock grades, such as ledger papers, were found to contain carbonless carbon papers which were the source of the PCBs. PCBs at that time were used as one component of the dye carrier in the carbonless carbon paper system.