Crude sulphate turpentine

The most important natural feedstock is turpentine. It can be produced by tapping suitable conifers, a process that involves making an incision in the bark and collecting the exudate in cups. Such turpentine is called gum turpentine. Wood turpentine is extracted mainly from tree stumps but the major source of turpentine is known as crude sulphate turpentine (CST) as it is a by-product of the Kraft paper process. 

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