Macerate
Macerate (lat. Maceratio, macerare = soak) or maceration , cold-water extract , cold extract , cold approach is to solve a method of volatile or thermally unstable ingredients from vegetable (from rare animal or mineral) materials.
In phytotherapy , cold water extracts are used to primarily remove mucilage and essential oils from the medicinal plants concerned. To do this, cold to lukewarm water is poured over the chopped up plant matter. Depending on the plant, the extract can be left to stand for up to twelve hours and then strained.
Cold water extracts are also used by gardeners to obtain environmentally friendly pesticides. Extracts from nettles have proven particularly useful .