Viscosity for doping nitrocellulose of various specifications Type Specification Falling Time Concentration Type Specification Falling Time Concentration L 1/8 1.7-3.0 25.0 H 1/2Low 3.2-6.0 20.0 1/4 Low 3.1-6.5 1/2High 6.1-8.4 20.0 1/4High 6.6-10.0 1 8.5-16.0 12.2 1/2Low 3.2-6.0 20.0 3 2-4 1/2High 6.1-8.4 10 5-12 15 13-20 H 1/8 1.7-3.0 25.0 30 21-40 1/4a 3.1-4.9 60 41-80 1/4b 5.0-8.0 120 81-160 1/4c 8.1-10.0