Increased popularity of white top linerboard for enhanced graphics for corrugated packaging is an increased cost and loss of strength [3] which becomes more important with the trend to lighter weights. Pigments are potentially more effective and less expensive than bleached pulp to achieve desired levels of brightness. Indeed, Ref. [2] also demonstrated that application of a clay base coat can add 10 to 15% compression strength which does not occur with coatings containing only polymer. The clay base coat forms a less porous surface allowing a thinner application of polymer top coat resulting in a higher water resistance at a given thin coat weight. The increase in strength is attributed to the high modulus of clay compared to polymer. Thin films of polymer and pigment/polymer blends have been made and their moduli measured confirming the advantage in stiffness that is obtained when using a platy clay coating