Abstract: The invention relates to a decorative paper sheet, made impregnable by a thermosetting resin, characterized in that it comprises one or more polymers making the 60-second Cobb water absorption value of the sheet, determined according to the ISO 535 standard, at most 40% less than the grammage of the said sheet. It also relates to a decorative sheet impregnated with a thermosetting resin and the laminated decorative panels or moulded section which include it. The invention also relates to a process for manufacturing the sheets as well as to the decorative sheets impregnated with a thermosetting resin.

Abstract: Security paper which immediately reveals an attempt to alter handwriting thereon by the use of an alkaline ink remover and which is characterized by the incorporation therein of a pyrenesulphonic acid or a metal salt thereof, particularly an alkali metal or alkaline earth metal salt.Security paper incorporating such an acid or salt exhibits a fluorescent coloration when contacted with an alkaline ink remover.