Ffibr naturiol bras yw jiwt a darddir o ddwy rywogaeth o'r genws planhigyn Corchorus.
Ffibr plisgyn ydy'r ffurf gyffredin—jiwt melyn—a wneir o feinwe fewnol rhisgl y malws melyn (Corchorus olitorius). Fodd bynnag, ystyrir jiwt gwyn, a wneir o falws gwyn (Corchorus capsularis), o ansawdd well. Defnyddir jiwt yn bennaf i wneud sachau, rhwymynnau, a defnyddiau tebyg i gasglu a phecynnu nwyddau amaethyddol a diwydiannol.
Enghraifft o'r canlynol | fiber |
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Math | bast fibre, ffibr planhigyn |
Cynnyrch | Corchorus capsularis, Corchorus olitorius |
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