Abstract: A silver salt photothermographic dry imaging material wherein said material has photographic speeds (1) and (2) determined based on the predetermined conditions and the photographic speed (2) is not more than 1/10 of the photographic speed (1), and the coefficient of determination value R2 of the linear regression line is 0.998–1.000, which is obtained from the predetermined density points having a* and b* arranged in two-dimensional coordinates in which a* is used as the abscissa and b* is used as the coordinate of the CIE 1076 (L*a*b*) color space, b* of the intersection point of the linear regression line with the ordinate is ?5–5, and gradient (a*/b*) is 0.7–2.5.
Abstract: This invention relates to a photographic element comprising a support and at least two silver halide emulsion layers further comprising, an electron transfer agent releasing compound represented by the formula (I):
CAR1—(L)n—ETA (I)
wherein:
CAR1 is a carrier moiety which is capable of releasing —(L)n-ETA on reaction with oxidized developing agent;
L is a divalent linking group, n is 0, 1 or 2; and
ETA is a releasable 1-aryl-3-pyrazolidinone electron transfer agent having a calculated log partition coefficient (c log P) greater than or equal to 2.40 and the total sum of the Hammett sigma(para) values of the substituents on the 1-aryl ring is 0.
Type:
Grant
Filed:
September 16, 2002
Date of Patent:
June 29, 2004
Assignee:
Eastman Kodak Company
Inventors:
John E. Keevert, Stephen P. Singer, Kenneth J. Reed, Kenneth J. Lushington, Mary C. Brick, James A. Friday