paper lexicon aging resistance ash content broke, rejects, spoilage bursting strength calender cellulose chlorine-free papers combined heat and power generation (CHP) consistency dandy roll digital printing double fold dryer section eco-label embossing felt side felts fillers fine paper fourdrinier machine graphic papers headbox laid paper laminating wood-containing paper long grain running direction offset paper offset printing opacity optical brightener paper grammage paper bulk paper machine paper size paper testing porosity pulp wood pulp pulper short grain size press refined paper stock preparation surface sizing sustainability uncoated paper watermark wire section wire side woodfree paper A aging resistance ash content B broke, rejects, spoilage bursting strength C calender cellulose chlorine-free papers combined heat and power generation (CHP) consistency D dandy roll digital printing double fold dryer section E eco-label embossing F felt side felts fillers fine paper fourdrinier machine G graphic papers H headbox L laid paper laminating wood-containing paper long grain M running direction O offset paper offset printing opacity optical brightener P paper grammage paper bulk paper machine paper size paper testing porosity pulp wood pulp pulper S short grain size press refined paper stock preparation surface sizing sustainability U uncoated paper W watermark wire section wire side woodfree paper