Coating processes – Fraud or tamper detecting
Patent
1980-10-30
1982-04-20
Lusignan, Michael R.
Coating processes
Fraud or tamper detecting
283 8R, B41M 314, B44F 112
Patent
active
043259812
ABSTRACT:
A method of preventing color accurate reproduction of a colored pattern with color photocopiers or color photography using photosensitive materials having spectral sensitivity in the wavelength ranges consisting of the human visible range and the adjacent wavelength ranges thereto, comprising, forming at least portion of the colored pattern with a color material having a spectral reflection factor curve with high spectral reflection in at least one of the areas of wavelength below 450 nm and above 650 nm so that a reproduction of the colored pattern is in a color not perceivable by a direct human viewer of the colored pattern. The color material also has at least one high spectral reflection peak or area within the human visible wavelength range so that the perceived color of the colored pattern is different from a reproduced color using color photocopiers or photography.
REFERENCES:
patent: 1002600 (1911-09-01), Bawtree et al.
patent: 1692405 (1928-11-01), Freeman
patent: 3679448 (1972-07-01), Tramposch
patent: 3679449 (1972-07-01), Nagot et al.
patent: 3713861 (1973-01-01), Sharp
patent: 3852088 (1974-12-01), Godlewski et al.
patent: 4066280 (1978-01-01), LaCapria
Masui Kiyoshi
Miyajima Keiji
Nagatomo Hideo
Sugiura Takeo
Bell Janyce A.
Lusignan Michael R.
Toppan Printing Co. Ltd.
LandOfFree
Method of preventing color accurate reproductions using color ph does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of preventing color accurate reproductions using color ph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preventing color accurate reproductions using color ph will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1263595