The fibre's extraction and cleaning are expensive, chiefly because several steps--involving scraping, pounding, heating, washing, or exposure to chemicals--are needed to separate the raw fibre from the adhesive gums or resins in which it is ensheathed.
Some or all are needed to separate the raw fibre from the adhesive gums or resins in which it is ensheathed. The fibre's extraction and cleaning are expensive, chiefly because of the several steps--involving scraping, pounding, heating, washing, or exposure to chemicals.
The fibre's extraction and cleaning are expensive, chiefly because of the several steps--involving scraping, pounding, heating, washing, or exposure to chemicals. Some or all are needed to separate the raw fibre from the adhesive gums or resins in which it is ensheathed.
The fibre's extraction and cleaning are expensive, chiefly because of the several steps--involving scraping, pounding, heating, washing, or exposure to chemicals. Some or all are needed to separate the raw fibre from the adhesive gums or resins in which it is ensheathed.