Abstract
Carboxyl methyl cellulose (CMC) is one of the most commonly used rheological modifiers for paper coating colors. Addition of CMC influences, among other things, the pore size distribution of coating layers which is an important parameter for paper coatings and affects the print quality and optical properties of the coated paper. In the present study, the effects of CMC on the pore size distribution of kaolin based coating layers applied on polyester film were investigated by means of 2 H and 1 H NMR relaxation methods. The pore size distributions of two types of coating layers, with or without CMC, were determined from the observed 1 H (at 26 MHz) and 2 H (at 4 MHz) NMR relaxation profiles of the imbibed water
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