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My TAPPI Story: Naomi Gehling
Prakash B. Malla
Robert E. Starr
Timothy J. Werkin
Paper Research & Applications Laboratory
Thiele Kaolin Company
A statistically designed (response surface methodology) coating study was conducted using a cylindrical laboratory coater (CLC) to determine the effects of the amount of ultrafine particles (<0.2mm) in="" hydrous="" kaolin="" pigment,="" structured="" (calcined)="" clay="" loading="" and="" binder="" level="" on="" gloss="" and="" offset="" print="" quality.="" results="" show="" that="" these="" parameters="" profoundly="" affect="" coating="" film="" pore="" volume,="" pore="" size,="" and="" surface="" smoothness="" which,="" in="" turn,="" affect="" gloss="" and="" various="" offset="" print="" properties.="" we="" have="" also="" demonstrated="" that="" response="" surface="" methodology="" can="" be="" used="" to="" optimize="" the="" level="" of="" various="" parameters="" in="" a="" coating="" formulation="" for="" maximum="" gloss="" and="" offset="" print="">
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Effects of Kaolin Particle Size, Structured Clay Loading, and Binder Level on Glossing and Offset Pr