IMPROVED OPTICAL BRIGHTENING COMPOSITIONS

摘要

A sizing composition for paper, characterised in that the sizing composition comprises (a) at least one optical brightener of formula (1), (b) a magnesium salt; and (c) a binding agent, which is selected from the group consisting of native starch, enzymatically modified starch and chemically modified starch; 0.1 to 15 parts of component (b) being present per part of component (a).