| 摘要 |
<p>The process consists in applying, to a sheet of absorbent cellulose-type material 1 provided on one or both its faces with illustrations 2 of various types, plastic sheets or films 3 which back against the two faces by means of an adhesive, being fastened through the action of heat, which films of greater or lesser thickness vary the permeability and consequently the diffusion of the fragrance, it being possible or otherwise to include a plurality of holes in the plastic films for the regulation of the diffusion of the fragrance which is applied by means of immersion for a certain period of time until it is totally impregnated, it being possible or otherwise for it to be subjected to a pressure in excess of atmospheric pressure in order to accelerate the process and when the plastic film is not very permeable, so that absorption takes place via the contour or edge of the figure lacking plastic film.</p> |
