abstract |
The process consists in coating the support with a thin layer of an aqueous dispersion of plastic material, in particular of styrene acrylate or of styrene acetate and in drying it, then, with a layer of the encapsulated substances, such as microcapsules. , having a small amount of binder, to dry it definitively, immediately by hot air, producing a support easy to handle in order to open the capsules by friction effect. |