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bamboo comes from Vietnam. Saigon Bamboo, as it is often called, has the double advantage of high inflammability and resistance to worm. Not every factory can afford to buy this type of bamboo cane, however, especially those engaging in the production of low-priced commodities. These factories, instead, often use Haifang Bamboo (T), Peihai Bamboo (EV), Shant'ou Hairy Bamboo (€, Phyllostachys edulis) and Formosan Bamboo (A). These sticks are cheaper but their fibrous surface makes the manufacturing processes difficult.
The second type of bamboo used is called Grass Bamboo (#†, ts’ao chu) which comes mainly from China. The species is more often used to manufacture joss sticks of greater length. The length of this type of joss stick demands a species of bamboo which has the joints wide apart. Moreover, the bamboo exploited must be old and dry enough so that the bamboo core can support the immense weight added to it by the incense powder. As a result, bamboo bark and cambium are very seldom used as they are either too brittle or too slender. Instead, the xylem of old bamboo is used since it alone is hard enough.
In the field study, it was found that other than three incense wood mills and four factories specializing in the production of incense coils, all the factories used bamboo canes from China as their basic raw materials. Nevertheless, three of them reported the use of bamboo from Singapore as a supplement in the production of higher grade joss sticks. Only one uses the canes from Thailand.
To prepare bamboo trees for joss stick manufacture, they are first felled into logs, and then cut into canes. The canes must have a square cross-section so that the final products do not flatten out. In addition, the longitudinal cross-section of the canes has to be uniform in order to produce fine joss sticks.
b) Incense Wood Milling
Within the broad categories of joss sticks and incense coils, incense products can be further sub-classified on the basis of their fragrances. In general, the fragrances of joss sticks include Aloe-scented, Sandal-scented, Cypress-scented, Rose-scented, Lign-aloe-scented, benzoin-scented and scentless. These different kinds of scents come from different kinds of fragrant trees. Today, aloewood is obtained from Aquilaria agallocha which is widely grown in Hainan Island and Annam. Ch'ên-hsiang (D), as it is often called, is not commonly used because it