Fig. 5

TS (left) and TSF (right) of rag (squares), groundwood (circles), and bleached pulp (triangles) papers as a function of the approximated publication date. The error bars indicate the instrumental errors for each paper type

TS (left) and TSF (right) of rag (squares), groundwood (circles), and bleached pulp (triangles) papers as a function of the approximated publication date. The error bars indicate the instrumental errors for each paper type