ABSTRACT Kraft Pulping uses active chemicals to separate cellulose and hemicellulose from lignin and extractive substances. Sodium Hydroxide (NaOH) and Sodium Sulfide (Na2S) are the main ingredients in White Liquor which play a role in degrading lignin. The amount of ratio between liquor to raw materials must be known so that lignin can be completely dissolved in the cooking liquid. Kappa Numb…