| 摘要 |
A method of reducing the paper or paperboard costs to the owners of a press in the printing of ink on paper or paperboard substrates. The method including providing a press with one or more printing stations. Before feeding the substrates involved to an ink printing station on said press there is applied to said substrates a pore-sealing material to substantially eliminate any porosity thereof to enhance the print quality and gloss of a glossy water-based overprint coating. When on is applied thereto. Where a glossy coating is to be applied, it is applied after the substrates have been printed with ink by said press, and in a manner preferably to achieve 80-92 gloss. If a glossy coating is to be applied over portions of the inked substrates, a dull coating can be applied by the press over other portions of the substrates after all the ink has been applied and before the glossy coating is applied. To reduce the total cost of the equipment needed to produce a desired product having at least 3 colors, the printing press used preferably has at least 5 printing stations with one station before all of the ink-applying stations applying said pore-sealing material and one station after the last ink-applying station applying said glossy coating. Alternatively, if the printing press does not have enough stations to apply the pore-sealing material, the ink and the glossy coating in one pass through the press, the pore-sealing material can be applied to the substrate before said press is involved. Another aspect of the invention is to apply the pore-sealing material and the glossy coating using the multi-layered flexible body shown in U.S. Pat. No. 5,771,809. Finally, the substrates involved utilize a biodegradable paper or paperboard and all the inks and coatings applied thereto are biodegradable.
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