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Calendula officinalis is a short-lived aromatic herbaceous perennial, growing to 80 cm (31 in) tall, with sparsely branched lax or upright stems.The leaves are oblong-lanceolate, 5–17 cm (2–7 in) long, hairy on both sides, and with margins entire or occasionally waved or weakly toothed.
An extract (essence) is a substance made by extracting a part of a raw material, often by using a solvent such as ethanol, oil or water. Extracts may be sold as tinctures or absolutes or dried and powdered.
The young leaves can be cooked. The flower buds can be pickled. [17] The roots can be peeled, sliced, boiled and sweetened to make candy. Water used to boil any part of the plant can be used as an egg white substitute. [17] The root extract (halawa extract) is sometimes used as flavoring in the making of halva.
Butterfly pea flower tea gains its distinctive tint from the deep blue color of the petals that has made the plant a popular dye for centuries. One of the aspects of the tea is the fact that the liquid changes color based on the pH level of the substance added to it, for instance, adding lemon juice to the tea will turn it purple.
Calendula (/ k ə ˈ l ɛ n dj uː l ə /) [2] is a genus of about 15–20 species [3] of annual and perennial herbaceous plants in the daisy family, Asteraceae that are often known as marigolds.
In the solvent extraction method, the flowers are agitated in a vat with a solvent such as hexane, which draws out the aroma compounds as well as other soluble substances such as wax and pigments. The extract is subjected to vacuum processing which removes the solvent for re-use. The remaining waxy mass is known as a concrete.
The extract is subjected to vacuum processing, which removes the solvent for re-use. The process can last anywhere from hours to months. Fragrant compounds for woody and fibrous plant materials are often obtained in this matter as are all aromatics from animal sources.
The ethanol extract is cooled (e.g., to −15 °C) to solidify waxes, and cold filtered to yield a liquid extract. When the ethanol evaporates, an oil—the absolute—is left behind. [1] Traditionally, the absolute was obtained by enfleurage, where the resulting pomade was extracted with ethanol to yield the absolute.