Abstract: The present invention relates to a security paper that cannot be forged with respect to forgery attempts with non-aqueous solvents, characterized in that it comprises on its surface and/or in its bulk, clusters formed of elementary particles that are both insoluble in water and in solvents, amalgamated with an agglomerating agent that is also insoluble in water but almost instantaneously soluble in at least one non-aqueous solvent so as to release said elementary particles in the paper, which elementary particles are preferably less than 20 ?m, and more preferably still less than 10 ?m, they are colored and are advantageously intense pigment dyestuffs such as those used for producing inks or paints.

Abstract: The present invention relates to a security paper that cannot be forged with respect to forgery attempts with non-aqueous solvents, characterized in that it comprises on its surface and/or in its bulk, clusters formed of elementary particles that are both insoluble in water and in solvents, amalgamated with an agglomerating agent that is also insoluble in water but almost instantaneously soluble in at least one non-aqueous solvent so as to release said elementary particles in the paper, which elementary particles are preferably less than 20 ?m, and more preferably still less than 10 ?m, they are coloured and are advantageously intense pigment dyestuffs such as those used for producing inks or paints.

Abstract: The invention concerns a glossy or scintillating paper provided with a roughness more than 30 ml/mm measured in accordance with the ISO 8791-2 standard, entirely manufactured on a paper machine, and characterized in that it comprises reflecting microplates or microbeads of dimensions less than 300? incorporating at least one optically transparent material in their structure.

Abstract: Coating and impregnation of bases.The invention relates to a composition for impregnating a base, more particularly a paper or textile base, said composition being intended to provide said base with barriers, especially at least hydrophobic barriers, and including glyoxal, the composition also being intended to provide oleophobic and solvanophobic properties simultaneously and comprising the following, by weight of dry product relative to the base:at least 0.03% of glyoxal,at least 0.01% of a dimeric alkylketen andat least 0.002% of a fluorinated salt selected from the family of the diethanolamine salts of perfluoroalkyl ethyl phosphates.Composition for rendering a paper or textile base hydrophobic, oleophobic and solvanophobic.

Abstract: This invention relates to the paper-making domain and especially to a forgery-proof safety paper, which includes on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 may be either H, OH, or OR,R being a hydrocarbon chain, substituted or not, straight, cyclic or aromatic,with A forming one or more cycles, substituted or not. This invention is particularly applicable to forgery-proof safety papers such as cheques or handwritten documents for payment.

Abstract: A forgery proof safety paper comprises, on its surface and/or in the body of a paper substrate, at least one compound of the formula ##STR1## wherein R.sub.1 is H or OH, and R.sub.2 is H, COOH, CHO, COR, COOR or alkyl, R being a substituted or unsubstituted, linear, cyclic or aromatic hydrocarbon chain.

Abstract: This invention relates to an unfalsifiable safety paper comprising on its surface and/or in its mass, at least one compound responding to formula: ##STR1## in which: R corresponds to hydrogen, to an alkyl group of C.sub.1 to C.sub.8, substituted or not, to a non-substituted, N-substituted or N,N-substituted amine group, to NO.sub.2, to a halogen;n is equal to 0 or 1.The invention is applicable to handwritten pieces for payment.