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US 2006/0185807 A1Published application
Patterned paper with improved printing or lettering features
AssigneeM-real Oyj
InventorsFranz Becker, Viktor Uerlings
Life of this patent
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Abstract
The present invention relates to a process for the production of nonuniformly intensely colored paper with improved printing or lettering features, and paper produced by this process.
Claims11
A process for the production of nonuniformly intensely colored paper, comprising
- a) application of at least one surfactant or a mixture of surfactants in the form of a latent image or pattern to paper, whereby the surfactant(s) is/are mixed with at least one filler (pigment), selected from oxides of metals or semimetals as for example magnesium, calcium, aluminium, zinc, chromium, iron, copper, tin, lead or manganese, or inorganic matters, or organic matters, or combinations thereof,
- b) coloring of the paper by means of a dye solution and
- c) drying of the colored paper.
Dependencies are inferred from the claim text.