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Pitch problems are the most common in papermaking process in the world. The mechanism in the degradation of resinous materials in wood during seasoning of logs was studied because the seasoning might be the best way to prevent the problems. From the results of the study, an enzymatic pitch control method was developed. Lipase hydrolyzes triglycerides to fatty acids and glycerol, therefore other resinous materials may not be coagulated without triglycerides cores. When lipase was added into groundwood pulping process, the effect of the enzyme addition on the product quality was detected in the long term. The enzyme did not spoil the quality and rather gave a good effect on the product. After the establishment of this technology, several mills in Japan have started to use it.In the pulp and paper industry, pitch is an unsolved problem caused by resinous components in wood. During the pulping process these components are released and stick to the tile and metal parts of the production line, pitch also accumulates and sticks to the roll and wire of the papermachine. It stains the felts and eventually reaches the dryer section. Pitch accumulation causes paper stain and web break on the papermachine which is a severe problem in paper production. Enzymes can help alleviate these problems. Fundamental ResearchWood Extractives. Extractives from wood used in papermaking, especially organic extractives from soft wood, consist of various components. They exert a number of effects on pulping and papermaking process. These extractives are hydrocarbons, alcohol, phenols, fatty acids, stilbenes, flavonoids, tannins, lignans and various terpenes

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