METHOD OF PAPERMAKING WITH PROTECTING ELEMENT, PROTECTING ELEMENT AND METHOD OF ITS PRODUCTION
FIELD: textiles, paper.SUBSTANCE: method of papermaking and the method of production of the protecting element are proposed. The protrusions or recesses in the form of a light watermark are formed on a paper, and these protrusions or recesses are sealed. On some parts of the paper surface, containin...
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Format: | Patent |
Sprache: | eng ; rus |
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