| 摘要 |
<p>332,094. Dehn, F. B., (Snyder Document Protection Co.). Aug. 9, 1929. Papcr, treating with special materials; cheque, draft, and like paper.-Paper for documents such as cheques comprises a body portion 10 of uncalendered paper sufficiently bibulous to permit ink quickly to diffuse therethrough and an opaque coating 11 sufficiently weak in texture to be rupturable throughout its thickness by a writing implement. In use, the ink passes through the coating and spreads in the body of the paper as shown, thus making impossible the removal of the ink from the paper. Casein is stated to be a suitable coating material.</p> |
