Traditional Northern Agarwood Incense Northern Heirloom Agarwood Since ages, Agarwood Đức Thụ All make incense from natural materials. For hundreds of years, Đức Thụ still follows the traditional method of making incense from bark, Sandalwood, Cedar, raw materials, Cardamom, Te Tan, Cloves, Burdock, Licorice... However, Đức Thụ Agarwood kept the secret of his father's concoction, creating the line Incense differences in the domestic and international agarwood market.