To extract commercially useful fibres from a plant stem and investigate their properties. Using plant fibres in this activity you extract the fibres from plants and then test their strength. Extracting fibres from mature nettle stems safety wear eye protection and gloves when handling the unretted nettles to avoid being stung. Procedure 1 remove the leaves and any flowers from stems of mature stinging nettles. Place the stems in a bowlbucket of water so that they are completely. Extracting fibres from plants standard techniques animal behaviour cells to. Plant fibres are still of economic importance even though many synthetic polymer alternatives are now available. Notes on the procedure the method for extracting the fibres from mature nettle stems is given in the student sheet. Students could do this themselves or it could be done in advance and the fibres provided already extracted from the stem. In this activity you extract the fibres from plants and then test their strength. Fibres have been extracted from plant stems for centuries and used in the commercial manufacture of a wide range of textiles and paper. Flax (linum usitatissimum), also known as common flax or linseed, is a member of the genus linum in the family linaceae. It is a food and fiber crop cultivated in cooler regions of the world. Textiles made from flax are known in western countries as linen, and traditionally used for bed sheets, underclothes, and table linen. Long textile fibers, the equipment has limited through - put capacity. With field or dew retting, plant stems are cut or pulled up and left in the field to rot. Thick-walled fiber cells occurring in the phloem parenchyma of stems of various dicots. Individual bast fibers can be made up of hundreds of cells and can be over 4. During harvesting, the plant is cut a short distance from the roots and left to dry within a farm. Though the seeds and leaves comprising the upper portion are removed. Hemp processing (post harvest processing) post harvest processing is the immediate agricultural processing of wet and dried herbal material needed to prepare the hemp for industrial, food or medical use. Hemp post harvest handling facilities are an essential and often neglected part of the supply chain for medical hemp for cbd manufacture.