Incense is an aromatic biotic material that releases fragrant smoke when burnt. The term is used for either the material or the aroma. Incense is used for aesthetic reasons, religious worship, aromatherapy, meditation, and ceremony. It may also be used as a simple deodorant or insect repellent.
Incense is composed of aromatic plant materials, often combined with essential oils. The forms taken by incense differ with the underlying culture, and have changed with advances in technology and increasing number of uses.
Incense can generally be separated into two main types: "indirect-burning" and "direct-burning". Indirect-burning incense (or "non-combustible incense") is not capable of burning on its own, and requires a separate heat source. Direct-burning incense (or "combustible incense") is lit directly by a flame and then fanned or blown out, leaving a glowing ember that smoulders and releases a smoky fragrance. Direct-burning incense is either a paste formed around a bamboo stick, or a paste that is extruded into a stick or cone shape.
The word incense comes from Latin incendere meaning 'to burn'.
Combustible bouquets were used by the ancient Egyptians, who employed incense in both pragmatic and mystical capacities. Incense was burnt to counteract or obscure malodorous products of human habitation, but was widely perceived to also deter malevolent demons and appease the gods with its pleasant aroma. Resin balls were found in many prehistoric Egyptian tombs in El Mahasna, giving evidence for the prominence of incense and related compounds in Egyptian antiquity. One of the oldest extant incense burners originates from the 5th dynasty. The Temple of Deir-el-Bahari in Egypt contains a series of carvings that depict an expedition for incense.
The Babylonians used incense while offering prayers to divine oracles. Incense spread from there to Greece and Rome.
Incense burners have been found in the Indus Civilization (3300–1300 BCE). Evidence suggests oils were used mainly for their aroma.
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Chinese folk religion, also known as Chinese popular religion, comprehends a range of traditional religious practices of Han Chinese, including the Chinese diaspora. Vivienne Wee described it as "an empty bowl, which can variously be filled with the contents of institutionalised religions such as Buddhism, Taoism, Confucianism and Chinese syncretic religions”. This includes the veneration of shen (spirits) and ancestors, exorcism of demonic forces, and a belief in the rational order of nature, balance in the universe and reality that can be influenced by human beings and their rulers, as well as spirits and deities.
An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the oil of the plant from which they were extracted, such as oil of clove. An essential oil is essential in the sense that it contains the essence of the plant's fragrance—the characteristic fragrance of the plant from which it is derived.
Frankincense (also known as olibanum) is an aromatic resin used in incense and perfumes, obtained from trees of the genus Boswellia in the family Burseraceae. The word is from Old French franc encens ('high-quality incense'). There are several species of Boswellia that produce true frankincense: Boswellia sacra (syn. B. bhaw-dajiana, syn. B. carteri), B. frereana, B. serrata (B. thurifera, Indian frankincense), and B. papyrifera. Resin from each is available in various grades, which depends on the time of harvesting.
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