Date of Award
Bachelor of Science
Pulp and Paper Technology
Dr. Richard B. Valley
A pilot plant paper machine trial was ran using 100% softwood stocks refined in a Jordan and double-disk refiner and then blended to give a gradual change in stock quality at a set freeness. Two freeness levels were used. WRV's and press section moistures were taken for each stock ran and evaluated. It was concluded that the WRV of a stock does vary with different refining techniques at a set freeness and in certain cases the WRV related to percent solids out of the press section. However, the sensitivity of the test to varying stock qualities varied widely. Problems arose with the mesh size of the fitted crucibles. A history of the development of the WRV test is also presented.
Stoltz, Michael J., "The Influence of the Water Retention Value (WRV) on Percent Moisture Through the Press Section" (1983). Paper Engineering Senior Theses. 521.