| abstract |
A paper structure having both high opacity and improved tensile strength through the incorporation of expanded fiber and an opacifying mineral pigment, such as titanium dioxide, is disclosed. The addition of expanded fiber to the paper structure makes it possible to increase the opacity of the paper through the use of conventional mineral pigments without adversely affecting the paper's tensile strength. These opacified paper structures are especially useful for producing high quality, strong, light weight printing and writing papers which require mineral pigments for enhanced opacity. |