PAPER SIZING

摘要

Treatment of paper during manufacture or afterwards with a chemical formulation improves the Cobb value of the paper, and its tensile strength. The treatment may be performed during manufacture of the paper. Alternatively, the treatment may be carried out on finished paper, or on paper products such as packaging items. The chemical formulation comprises organic solvents and is preferably a dispersion of a polymer in a mixture of such solvents. The process of the invention is particularly useful in relation to security papers such as are used for banknotes etc.