De que é feito paper
A material made of plant fibres; the oldest find is from Fangmatan (2nd century BC), and Cai Lun improved the technique (105).
- Paper machine — utiliza. Industrial production.
- Celulose — é feito de. Paper is cellulose fibres.
- Alvejante — é feito de. Bleach makes paper white: without it wood pulp would be yellowish grey.