In Paper Titanium dioxide pigment is used in paper for opacity, brightness and color stability in three very distinct areas. These include filler, coating and paper laminate. In this application, titanium dioxide pigment is added directly to the pulp and becomes a part of the sheet, itself. The term filler does not accurately convey the purpose of the pigment. True fillers are materials, such as clay or calcium carbonate.
Titanium dioxide is a pigment contributing to the opacity and brightness of the paper.
Without titanium dioxide, one could not produce high opacity lightweight papers such as Bible Paper. For this application, the anatase modification is preferred. These are typically high gloss papers, such as those in catalogs and magazines. The coating which is applied to the paper usually contains titanium dioxide pigment. Unlike a filler type application, here the anatase or rutile type may be used.