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Alkyl Ketene Dimers (AKD) is one of the additive chemicals in the paper industry which is used as a sizing agent which functions to improve the hydrophobic properties of paper. The amount of addition of AKD would have an effect on paper durability in water absorption and liquid penetration, so that it needs to be tested. The testing was carried out in four stages, namely the furnish manufacturing stage, the paper-making stage (the hand sheet process), and the cobb size and size effect testing phase. Cobb size and size effect testing was done on paper with a gram size of ± 70 g/m with the addition of AKD which varies (0, 10, 12, 14) kg / T. The smaller cobb size value and the larger size effect value was shown every time the AKD was increased. This showed that the more AKD added, the less paper absorbs water and the longer the penetration time of the chemical solution penetrates the paper. Keywords—Alkyl Ketene Dimers; paper durability; water absorption; penetration

The Influence and The Analysis Of Alkyl Ketene Dimers (AKD) to Paper Resistance in Water Absorption and Chemical Solution Penetration