Method for determining the paper quality for halftone printing

Details Method for determining the paper quality for halftone printing Method for determining the paper quality for halftone printing

2006-08-01

2006-08-01

Lee, Hwa (Andrew) (Department: 2877)

Optics: measuring and testing

Of light reflection

With diffusion

C356S445000, C356S600000, C250S559010

Reexamination Certificate

active

07084981

ABSTRACT:
The invention relates to a method for determining the paper quality for halftone printing, according to which a finely distributed pattern of geometric figures is applied to the paper, said paper is then illuminated and the light that is reflected and scattered by the paper is observed. The method is characterized in that the pattern is applied to an optical transparent planar element, the side of said element bearing the pattern is brought into contact with the surface of the paper and the paper is pressed against the planar element.

REFERENCES:
patent: 4541273 (1985-09-01), Bery
patent: 5146097 (1992-09-01), Fujiwara et al.
patent: 6153038 (2000-11-01), Brooker
patent: 06286325 (1994-10-01), None
patent: WO 00/39749 (2000-07-01), None
patent: WO 03/005004 (2003-01-01), None

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