Title:
IR吸収感光性光学的可変性インク組成物及び方法
Document Type and Number:
Japanese Patent JP2008503642
Kind Code:
A
Abstract:
Water-soluble, photosensitive, optically variable (POV) inks exhibit improved OCR readability due to improved infrared absorption properties. The inks can produce images that can be viewed with both visible and ultraviolet light to have physically coincident positive and negative images. The new inks contain at least two types of colorants in addition to the IR absorber and other suitable ingredients. The first colorant comprises a fluorescent dye or pigment emitting light within a characteristic emission band when excited by fluorescent-exciting radiation. The second colorant comprises a carbon black infrared radiation absorbing composition alone or with one or more dyes or pigments having a light absorption band at longer wavelengths than the characteristic emission band of the first colorant or also overlapping the emission wavelength of the first colorant in such a way as to result in a dark color. The inks are formulated to provide higher contrast in the presence of IR radiation while retaining a strong negative correlation between the visible and fluorescent images.
Inventors:
Auslander Judith Dee
Chen Mike W
Chen Mike W
Application Number:
JP2007518115A
Publication Date:
February 07, 2008
Filing Date:
June 14, 2005
Export Citation:
Assignee:
PITNEY BOWES INCORPORATED
International Classes:
C09D11/00; B41J2/01; B41M5/00; C09K11/02; C09K11/06
Domestic Patent References:
| JP2007517946A | 2007-07-05 | |||
| JP2004090582A | 2004-03-25 | |||
| JP2005513171A | 2005-05-12 | |||
| JP2004528458A | 2004-09-16 | |||
| JP2005505444A | 2005-02-24 | |||
| JPH11209675A | 1999-08-03 | |||
| JP2002206088A | 2002-07-26 | |||
| JP2003513137A | 2003-04-08 | |||
| JP2003513138A | 2003-04-08 |
Attorney, Agent or Firm:
Sadao Kumakura
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama