The Blending and Wringer House was part of the nitration process. In order to obtain a uniform propellant and ballistic characteristic, portions of batches that have a high nitrogen content are mixed with portions that have a low nitrogen content. Slurry from the poaching tubs in the Poaching House were fed onto vibrating screens where nitrocellulose was blended, which passed into collecting boxes. The boxes were then emptied into tubs where guncotton and pyrocellulose were blended. If the sample from the tub had satisfactory nitrogen and solubility content, the slurry was pumped into the Wringer House. At the Wringer House, the large amounts of water that were used throughout the process to move the nitrocellulose is removed. The containers of partially dry nitrocellulose are transported to the Dehydration/Press House via lag cars.
