Title:
感光性不可視インク組成物及びその使用方法
Document Type and Number:
Japanese Patent JP4376380
Kind Code:
B2
Abstract:
A high-reliability invisible ink printing system (10) is provided which generates high-definition, lightfast images (210) that are easily read or otherwise detected using far red, infrared and/or ultraviolet light. The inks (32) contain an uncomplexed invisible metal phthalocyanine far red/infrared fluorophore (optimally chloroaluminum ÄIIIÜ phthalocyanine tetrasulfonic acid or salts thereof). An ultraviolet fluorophore can also be included. The inks (32) are invisible to the unaided eye. However, when exposed to far red or infrared light (wavelength = about 650 - 715 nm) they will fluoresce at a wavelength of about 670 - 720 nm. If an ultraviolet fluorophore is employed, the inks (32) can also be detected by applying ultraviolet light (wavelength = about 250 - 380 nm) which results in fluorescent emission at a wavelength of about 400 - 650 nm. The inks (32) are well suited for delivery using inkjet technology to efficiently form invisible images (210).
More Like This:
| JP2012131045 | BOOKLET FOR MENU AND SHOPPING IN PALM SIZE |
| JPH06139415 | IC CARD, IC CARD LOADING DEVICE AND IC CARD CONNECTOR |
| JPS5289400 | PRE*MARKED CARD |
Inventors:
William A. Holl
Application Number:
JP30654199A
Publication Date:
December 02, 2009
Filing Date:
October 28, 1999
Export Citation:
Assignee:
HEWLETT-PACKARD COMPANY
International Classes:
B42D15/00; C09D11/00; B41J2/01; B41M5/00; C09K11/06
Domestic Patent References:
| JP59138284A | ||||
| JP6309534A | ||||
| JP9245117A | ||||
| JP3020373A | ||||
| JP2091164A |
Attorney, Agent or Firm:
Satoshi Furuya
Kaoru Furuya
Takahiko Mizobe
Kaoru Furuya
Takahiko Mizobe