Changes in solid particle fraction of coating colors in high speed blade coating, 2012 PaperCon Conference

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Changes in a coating color composition in a recirculation loop of a coater can result in variability of runnability and paper quality. Besides an increase in coating color solids content, an average particle size increases as a result of depletion of fine materials. Mechanisms for changes in solid particle fractions of coating colors and control parameters are currently not well understood and documented.