Cast coating with improved speed and quality

Abstract From the Canadian patent

Cast coating is carried out upon a paper substrate having a surface of improved levelness and uniformity and preferably surfaced with a water insoluble coating which is desirably finished to maximize flatness and gloss, in order to substantially increase cast coating speed, decrease cast coating consumption and in, many circumstances, improve cast coat quality. In preferred practice, the paper substrate of improved levelness and uniformity which is cast coated is provided by precoating the paper with an aqueous coating containing a major weight proportion of finely divided solid mineral filler in admixture with a minor weight proportion of non-water absorptive, film-forming, heat-softenable …