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Targets of chemical - svr 3l management of rubber by tcvn 3769:2004 1. concentrations of contaminants retained on the 45m sieve,% m / m, not more than: 0.03 2. ash,% m / m, not more than: 0.50 3. nitrogen content,% m / m, not more than: .60 4. volatiles content,% m / m, not more than: 0.80 5. early plasticity (po), not less than: 35 6. maintain the viscosity index (pri), not less than: 60 7. lovibond color index, the form, not more than: 6 8. mooney viscosity ml (1 '+ 4') 1000c: -