PAPER & PULP MANUFACTURING1 min reference noteChemical Pulping Digester Mass Balance, Liquor-to-Wood Ratio & Kappa NumberSource notes β linked publications and standards below; organisations and authors named there do not author or endorse this page.1. Active Alkali ChargeAA Charge % = [ Mass of (NaOH + Na2S as Na2O) / Oven-Dry Wood Mass ] Γ 100%PEER-REVIEWED TEXTBOOK & JOURNAL CITATIONSRydholm, S. A. (1965). Pulping Processes. Interscience Publishers. [Access Reference]