Abstract: A cost effective, pressure-sealed, multi-page paper assembly is configured as a mailer-type of assembly for use as a business form, direct mail piece or other document to distribute information to end-users. The multi-page paper assembly is formed from a single ply or sheet of paper that permits use of such cost-saving technologies as laser printing and imaging of the single ply or sheet. The multi-page paper assembly includes a central transverse line of cross fold perforations and a plurality of lines of fold assist perforations that permit the single ply or sheet to be folded into a desired Z-fold, C-fold, eccentric C-fold, V-fold, double parallel-fold or other folded configuration having a number of inboard panels to serve as pages of the assembly. Deposits of pressure-activated cohesive along one or both surfaces of the single ply or sheet are placed to define those panels to serve as inboard boards and to adhere portions of the ply or sheet when folded.

Abstract: The invention provides an improved method of transparentizing a paper substrate to produce a translucent area or “window” through which information and data are displayed. The method of the invention applies a transparentizing material to a preselected application site of the paper substrate, and exposes the transparentizing material to heat for a predetermined period of time to help facilitate penetration of the transparentizing material into the paper substrate and prevent migration of the transparentizing material from the application site. The rate of penetration of the transparentizing material into the paper substrate reduces the time and increases the efficiency of the transparentizing process. The invention also provides a paper substrate and a one-piece paper assembly in which a translucent area or “window” is formed according to the method of the invention.