Method for making safety paper with chemical watermark
OwnerMichele Tecchiainventor
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Abstract
The method is used for making watermarked safety paper and comprises the usual steps of a process of silk-screen printing on paper; moreover, a UV curing compound is used, adapted to alter the compactness and/or thickness of the paper fibers; the compound comprises urethane-acrylate resin and polyol-acrylate in the minimum total amount of 90% and maximum amount of 96%, and a low molecular weight methyl-methacrylate-n-butyl methacrylate copolymer, obtained from methyl and n-butyl esters of methacrylic acid, in the amount of 4-10%; the urethane-acrylate resin and the polyol-acrylate differ by a maximum percentage of 3%.
Claims5
A method for making watermarked safety paper comprising the steps of a process of silk-screen printing on paper, wherein a UV curing compound is used, which is adapted to alter the compactness and/or thickness of the paper fibers, wherein said compound comprises urethane-acrylate resin and polyol-acrylate in the minimum total amount of 90% and maximum amount of 96%, and a low molecular weight methyl-methacrylate-n-butyl methacrylate copolymer, obtained from methyl and n-butyl esters of methacrylic acid, in the amount of 4-10%, and wherein said urethane-acrylate resin and said polyol-acrylate differ by a maximum percentage of 3%.
Dependencies are inferred from the claim text.