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Printing material generating black and white silver halides

A photographic material and yellow dye technology, which is applied in the field of silver halide printing media for photography, can solve the problems of poor light stability of magenta dye, achieve the effect of improving thermal and light stability, and improving image quality

Inactive Publication Date: 2002-02-27
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another problem with current black-and-white media is that the photostability of the magenta dye formed by the coupler of general formula MAGENTA-1 is generally poor

Method used

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  • Printing material generating black and white silver halides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0204] The photo paper support was prepared as follows: a pulp furnish of 100% bleached hardwood kraft paper was refined through a double disc refiner followed by a Jordan conical refiner. To the resulting pulp furnish was added 0.8% sodium stearate, 0.5% aluminum chloride, 0.15% stilbene triazine FWA, 0.2% polyamide-epichlorohydrin, 0.7% anionic polyacrylamide and 0.6% titanium dioxide, all Ratios are based on dry weight. Total dry weight base paper of approximately 31.5 lbs per 1000 square feet (ksf) produced on a fourdrinier machine, wet processed to 42% solids, and dried with a steam heated dryer to 3% moisture content to an apparent density of 0.70 g / cc. The surface of the base paper substrate was sized with a 16% hydroxyethylated cornstarch solution by vertical pressing to achieve a starch loading of 4.2% by weight. The surface-sized support was dried to a moisture content of 8.8% using a steam-heated drier and calendered to an apparent density of 1.08 gm / cc.

[0205...

Embodiment 1

[0280] Example 1 of the present invention. The dispersion liquid of Example 1 of the present invention was prepared according to the method used in Comparative Example 1. At 140°C, couplers M-4, IC-27 and Y-5 were mixed in S-11 and S-9 (1 / .99wt / wt) at a weight ratio of 1.000 / 0.625 / 1.105, and mixed in gelatin aqueous solution emulsified to a final concentration of 7.4% by weight of gel, 18.18% by weight of oil and 9.97% by weight of joint coupler.

[0281] This dispersion was coated in the same multi-layer form as Comparative Example 4, except that the yellow coupler Y-5 was coated at 8.8 mg / square foot in layer 3 and 15.8 mg / square foot in layer 2. Coating, while in layer 1 was coated at 42.2 mg / square foot.

Embodiment 2

[0282] Example 2 of the present invention. The dispersion liquid of Example 2 of the present invention was prepared according to the method used in Comparative Example 1. At 140°C, couplers M-4, IC-27 and Y-4 were mixed in S-11 and S-9 (1 / .99wt / wt) at a weight ratio of 1.000 / 0.625 / 0.89, and mixed in gelatin aqueous solution emulsified to a final concentration of 7.4% by weight of gel, 18.18% by weight of oil and 9.97% by weight of joint coupler.

[0283] This dispersion was coated in the same multi-layer form as Comparative Example 4, except that the yellow coupler Y-4 was coated at 7.12 mg / square foot in layer 3 and 12.81 mg / square foot in layer 2. Coating, while in layer 1 was coated at 34.2 mg / square foot.

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Abstract

The invention relates to a photographic element for forming a neutral image contains a cyan dye forming coupler, a magenta dye forming coupler of formula MAGEN TA-2 and a yellow dye forming coupler of formula YELLOW-II (wherein variates are defined in this specification).

Description

technical field [0001] This invention relates to photographic silver halide print media and, in particular, to coupler co-dispersions for producing black and white print media developed in standard fast color processing chemistries. Background technique [0002] Black and white print media are formulated with one or more light sensitive silver halide layers, typically on a reflective substrate. Each photosensitive layer develops to a neutral dye color when processed in standard RA color development chemistry. This is accomplished by codispersing cyan, magenta and yellow forming couplers in such a way that the dye mixture formed during development combines to give the desired neutral color. Other colors of commercial value can be obtained by varying the relative proportions of the couplers in the co-dispersion. [0003] Commercial chromogenic print media currently use magenta couplers derived from pyrazolones of general formula MAGENTA-I, in particular the four equivalent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03C7/34G03C1/00G03C7/30G03C7/32G03C7/36G03C7/38
CPCG03C2005/045G03C7/3041G03C7/3225
Inventor M·R·罗伯茨K·M·施雷德F·D·科姆斯
Owner EASTMAN KODAK CO
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