| 摘要 |
The novel method of converting an offset litho into a positive gravure screen improves the so-called conversion method hitherto practised quite substantially since the positive gravure screen produced in accordance with the invention has the substantial advantage of producing a quality gravure which is superior in its brilliancy and simple technique to all previous gravure methods. The novel method produces a true positive gravure cell wall in the approximately 50-100% areas and round dots of different size in the approximately 50-5% areas which result in the brilliancy and the desired gradation of a true gravure.
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