| (19) |
 |
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(11) |
EP 0 752 619 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.06.1997 Bulletin 1997/23 |
| (43) |
Date of publication A2: |
|
08.01.1997 Bulletin 1997/02 |
| (22) |
Date of filing: 04.06.1996 |
|
| (51) |
International Patent Classification (IPC)6: G03C 7/25 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
20.06.1995 US 367 20.06.1995 US 355 20.06.1995 US 356 12.03.1996 US 614423 12.03.1996 US 614413 12.03.1996 US 614454
|
| (71) |
Applicant: EASTMAN KODAK COMPANY |
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Rochester,
New York 14650-2201 (US) |
|
| (72) |
Inventors: |
|
- Bowman, Wayne Arthur,
c/o Eastman Kodak Co.
Rochester,
New York 14650-2201 (US)
- Hagmaier, Charles Peter,
c/o Eastman Kodak Co.
Rochester,
New York 14650-2201 (US)
- Manioci, Frank Dean,
c/o Eastman Kodak Co.
Rochester,
New York 14650-2201 (US)
- Bogdanowicz, Mitchell Joseph,
c/o Eastman Kodak Co
Rochester,
New York 14650-2201 (US)
- Nelson, Roger Wayne,
c/o Eastman Kodak Co
Rochester,
New York 14650-2201 (US)
|
| (74) |
Representative: Fevrier, Murielle Françoise E. et al |
|
Kodak Pathé,
Département Brevets,
CRT - Zone Industrielle 71102 Chalon-sur-Saone Cédex 71102 Chalon-sur-Saone Cédex (FR) |
|
| |
|
| (54) |
Improved dye imbibition printing blanks and matrix films |
(57) Dye imbibition printing blanks are disclosed comprising a support bearing on one
side thereof a dye-receiving layer comprising a cationic mordant, and further comprising
an antistat layer substantially free of cationic polymers. The antistatic layer is
preferably provided on the opposite side of the support relative to the dye-receiving
layer. Such antistatic layer provides improved antistatic properties which enable
high manufacturing and processing speeds without adversely affecting printed image
qualities. In a preferred embodiment, the dye receiving layer comprises a cationic
mordant, a hydrophilic colloid and a plasticizer polymer, wherein the plasticizer
polymer is a latex polymer having a glass transition temperature below about 30°C
comprising from about 2 to 20 wt% of units having a quaternary ammonium group. Use
of such latexes provide dye imbibition printing blanks substantially free of haze
and brittleness. A process for exposing dye imbibition printing matrix films is also
disclosed comprising imagewise exposing a matrix film comprising a visible light sensitive
silver halide emulsion containing colloid layer on a support to blue, green or red
light, wherein the visible light sensitive emulsion is also sensitive to UV light
and the toe contrast of the imaged matrix film is controlled by (i) incorporating
a UV absorber in the colloid layer of the matrix film, and (ii) flash exposing the
matrix film with UV light in the substantial absence of light having a wavelength
above 410 nm, wherein the UV absorber provides sufficiently low absorption above 410
nm such that it does not substantially alter the effective photographic speed of the
matrix film during the imagewise exposure or the mid scale contrast of the imaged
matrix film, and sufficiently high absorption to the UV light to decrease the resulting
toe contrast of the imaged matrix film.