Novel traceless paper
The utility model relates to the technical field of printing paper manufacturing, in particular to novel traceless paper. Comprising addition type silica gel A, addition type silica gel B and printing paper, the addition type silica gel A is arranged above the printing paper, and the addition type s...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model relates to the technical field of printing paper manufacturing, in particular to novel traceless paper. Comprising addition type silica gel A, addition type silica gel B and printing paper, the addition type silica gel A is arranged above the printing paper, and the addition type silica gel B is arranged below the printing paper. The addition type silica gel A is liquid colloid and can be fused with the addition type silica gel B. The addition type silica gel A adheres to the upper face of the printing paper and can permeate into the printing paper. The traceless paper has the advantages that invisibility and writing performance of the folds are both considered, an oily pen can effectively write on the traceless paper, compared with silica gel paper, the traceless paper has the writing performance similar to that of unprocessed printing paper, the application range of the silica gel paper is widened, for example, the traceless paper can be produced as an answer sheet due to the fact that the |
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