Deproteinization of natural rubber latex was performed
by incubation of the natural rubber latex with 0.1 w/w%
urea in the presence of 1 w/w% SDS at room temperature,
for 1 h followed by centrifugation at 104 rpm. The cream
fraction after centrifugation was re-dispersed into 0.5 w/
w% SDS solution to make 30 w/w% DRC latex and was
washed twice by centrifugation to prepare DPNR. The
DRC of the DPNR latex was adjusted to 30 w/w% with distilled
water and SDS was added up to 0.1 w/w %.