Reducing Culled Paper by Improving Upstream Dirt Inspection Methods By Tim Galliford Technical Assistant, Sulfite Department Port Edwards Mill Domtar Industries Port Edwards, Wisconsin Abstract Domtar Industries mill in Port Edwards, Wisconsin targeted dirt reduction in their premium white paper grades as a priority for quality improvement. In the spring of 2003, key customers demanded a significantly lower dirt specification. It was quickly discovered that the existing method to inspect pulp for dirt and shives was not sensitive enough to predict dirt problems at the new specification level, resulting in a cull rate of around 200 tons per year of high value paper grades. The existing inspection method was difficult for bleach plant operators to consistently de

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