Pre-stressed substrate for photographic paper
US8734919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2009 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Nov 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pre-stressed substrate for a photographic paper includes a base paper having a front surface and a back surface; a top pre-stress coat on the front surface, the top pre-stress coat including a first pre-stress mixture containing at least a first pigment, a first binding material including a first water soluble binder and a first water-dispersible binder; and a back pre-stress coat on the back surface, the back pre-stress coating including a second pre-stress mixture containing at least a second pigment, a second binding material including a second water soluble binder. The weight % of the first water soluble binder in the first binding material is less than the weight % of the second water soluble binder in the second binding material. The pre-stressed substrate has a predetermined degree of curvature toward the back surface and is capable of countering curling forces that occur when the pre-stressed substrate is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.