Method of producing printed matter
US6893789B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2001 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for producing printed products, according to which method the surface of a sheet of paper or board is printed by the electrophotography technique or a similar printing method, wherein a dry finely-divided printing ink is transferred onto the printing base by means of an electric field. According to the invention, a paper or board is used the printing surface of which has a pigment-containing coating layer in which at least 20% of the pigment is made up of a hydrous pigment, such as gypsum, or in which at least 20% of the filler is made up of a hydrous filler, such as gypsum. When a gypsum pigment and/or a gypsum filler is used, the quality of the printed image is not sensitive to the control quantities used in the printing press. By means of the invention, a very regular print is indeed obtained, and so the invention is especially well suited for the printing of a sheet of a very matt paper or board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.