Method and security substrate for protecting against duplication

Details Method and security substrate for protecting against duplication Method and security substrate for protecting against duplication

1992-04-01

1994-08-16

Sluby, P. C.

Printed matter

Method

283 95, 283902, 428207, 428333, 428531, 428915, 428916, 503201, B42D 1500, B32B 300

Patent

active

053380665

ABSTRACT:
A method for protecting against duplication of a document with a color copier and a security substrate comprises providing a background color on a document having an average reflectance value and printing on the background with a contrast color having a spectral characteristic which modulates the average reflectance value by no more than 5% and has an average value equal to the average reflectance value. The contrast color is printed with a printing medium including one of a colorformer leucodye and an activating phenolic resin. The other of the colorformer leucodye and the activating phenolic resin is to the printing medium on the document later to verify that the document is an original.

REFERENCES:
patent: 4846502 (1989-07-01), Chang
patent: 4867481 (1989-09-01), Gundjian

Affiliated with

Also associated with

Rating

Method and security substrate for protecting against duplication 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 and security substrate for protecting against duplication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and security substrate for protecting against duplication will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-946720