| 摘要 |
<p>The invention concerns a product which by contact between two elements or objects, causes said two elements or objects to be separated, thereby causing previously masked characters or graphics to become visible. Said product consists of a sheet whereof both surfaces are coated with varnish and inks having an adhesive power with the paper lower than the adhesive power of the glue deposited on the sheet and contacted with the elements or objects which are to receive the graphics or characters.</p> |
