Nitrocotton/Nitrocellulose (NC) is the primary component of Smokeless, Rocket, and Ball Powder Propellants manufactured at the Badger Ordnance Works/Badger Army Ammunition Plant (BOW/BAAAP). NC is an explosive made by mixing Nitric Acid and Cotton or Wood Pulp. There were five NC Production Lines at Badger identified as B through F-line.
The photo above, from the Army Archive at Badger, is B-line NC under construction in early summer 1942.
This photo is the C-line NC Area in winter 1942