A new stabilization mechanism has been developed which enhances rosin particle adsorption onto cellulose fiber. This results in better size retention and less pH dependence as well as greater sizing efficiency. Defoamer and alum usage is reduced and machine cleanliness ensues. Sizing efficiency has been demonstrated to be 20 to 40% greater than that of the other commercial cationic products. The colloidal properties of the new product will be reviewed especially as concerns the colloidal stability as expressed by rheological observations. Mill and laboratory trial results along with the fundamental properties of this new cationic size will also be reviewed.
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