Process for the manufacture of colored intagliated articles
First Claim
1. A process for the manufacture of colored solid articles bearing at least one highlighted intagliation, which comprises coating colored intagliated articles by applying a suspension comprising at least one optically anisotropic substance, having a minimum refractive index not greater than 2.00 but free from a film coating agent, in a suitable liquid in which the optically anisotropic substance is insoluble or of relatively poor solubility, which process is carried out in a conventional film coating apparatus in such a way that a rubbing action takes place between the articles being coated and the color or the non intagliated surface of said article being essentially unchanged by said coating while the color of the intagliation is highlighted against the rest of the surface by said layer.
1 Assignment
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Accused Products
Abstract
Colored intagliated articles, for example colored intagliated pharmaceutical tablets, on which the intagliations are highlighted. The articles are colored intagliated articles bearing a layer consisting essentially of a defined optically anisotropic substance, for example magnesium carbonate. Process for manufacturing said articles.
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Citations
9 Claims
- 1. A process for the manufacture of colored solid articles bearing at least one highlighted intagliation, which comprises coating colored intagliated articles by applying a suspension comprising at least one optically anisotropic substance, having a minimum refractive index not greater than 2.00 but free from a film coating agent, in a suitable liquid in which the optically anisotropic substance is insoluble or of relatively poor solubility, which process is carried out in a conventional film coating apparatus in such a way that a rubbing action takes place between the articles being coated and the color or the non intagliated surface of said article being essentially unchanged by said coating while the color of the intagliation is highlighted against the rest of the surface by said layer.
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9. A process as claimed in claim 28 in which the film coating solution or suspension applied to said resulting article comprises at least one coloring agent.
Specification