NRL (low
ammonia (LATZ)-type) and latex chemicals (sulfur, antioxidant, potassium oleate,
ZDEC, ZMBT, zinc oxide, DPG, and SSF) supplied by Zarm Scientific & Supplies Sdn.
Bhd, Malaysia, were used in this research. Rice husks supplied by Kilang Padi Nazra
Sdn. Bhd, Malaysia, were collected, grounded, and sieved into an average particle size of
140 µm.