Impact of N,N-Methylene-bis-Morpholine on the Preservation of Natural Rubber Latex

Table 1

Preservation formula of fresh NRL.

Sample	Ammonia (%)	TMTD–ZnO (%)	MBM (%)	Na2CO3 (%)
A1	0.25	—	—	—
A2	0.25	0.04	—	—
A3	—	—	0.1	0.1
A4	—	—	0.15	0.1
A5	—	—	0.2	0.1
A6	—	—	0.25	0.1

Note. “—” indicates not addition; the dosage of preservative is measured by the wet weight of latex.