Influence of Soda Pulping Variables on Properties of Pineapple (Ananas comosus Merr.) Leaf Pulp and Paper Studied by Face-Centered Composite Experimental Design

Table 1

Levels of each independent pulping variable.

Independent variable	Symbol	Levels
Soda concentration (wt%)		4	4.5	5
Temperature (°C)		90	110	130
Pulping time (min)		20	40	60