The problems with hydrochloric acid began with the use of chlorine in bleaching paper fibers. For many years thereafter, the chlorine substances were insufficiently removed by washing, giving rise to the formation of the acid in paper. Although washing techniques have improved, excess residual hydrochloric acid can exist in paper because of the practice of using chlorine compounds to wash and bleach paper subsequent to its manufacture.
Timestamp: Saturday, 19-Nov-2011 13:18:42 PST
Retrieved: Monday, 19-Feb-2018 04:18:22 GMT