Air Emissions from the Manufacture of Inks

Mass balance data are employed to determine VOC emission factors for ink manufacturing processes. The data represent a broad spectrum of case studies in which inputs to ink mixing vessels are weighed both before and after mixing. The difference between pre-mixing and post-mixing weights represent air emissions. In contrast to EPA's estimate of 30 lb of VOC emissions per ton of manufactured ink (contained in the AP-42 emission factors), this work indicates that 44.7 lb/ton is a more accurate emission factor. The new data are expected to have a significant effect on permitting efforts for ink manufacturers as Title V operating permits are prepared.