Radiation imagery chemistry: process – composition – or product th – Luminescent imaging
Patent
1994-05-24
1995-10-24
Neville, Thomas R.
Radiation imagery chemistry: process, composition, or product th
Luminescent imaging
430502, 430567, 430967, 430435, G03C 516
Patent
active
054609160
ABSTRACT:
Disclosed is a silver halide photographic material for X-ray photography which has at least one light-sensitive silver halide emulsion layer on each side of a transparent support and constitutes a radiation image-forming system in combination with two radiation-intensifying screens respectively arranged on the front and the back sides of the photographic material. The photographic material is characterized by having a crossover rate of at most 15% with respect to the light emitted from said intensifying screens, and by producing an image having a characteristic curve such that when drawn using crossed coordinates equal to each other in unit length, with diffusion density as ordinate (Y-axis) and common logarithm of exposure amount as abscissa (X-axis), the characteristic curve provides a point gamma value ranging from 2.7 to 4.2 at every point within the optical density (diffusion density) range of 1.6 to 2.0 and a point gamma value of at least 0.25 at the density point corresponding to 1/10 of the exposure amount (-1.0 on logarithmic scale) required for providing the optical density of 1.8 when sandwiched between two intensifying screens having substantially the same sensitivity, subjected to stepwise exposure and then developed with Developer (I) having the following composition at a developer temperature of 35.degree. C. for a development time of 25 seconds:
REFERENCES:
patent: 4425426 (1984-01-01), Abbott et al.
patent: 4439520 (1984-03-01), Kofron et al.
patent: 4639417 (1987-01-01), Honda et al.
patent: 4689292 (1987-08-01), Metoki et al.
patent: 4803150 (1989-02-01), Dickerson et al.
patent: 5108881 (1992-04-01), Dickerson et al.
patent: 5252442 (1993-10-01), Dickerson et al.
patent: 5268251 (1993-12-01), Sakuma
Fuji Photo Film Co. , Ltd.
Neville Thomas R.
LandOfFree
Silver halide photographic material and method of forming radiat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silver halide photographic material and method of forming radiat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silver halide photographic material and method of forming radiat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1885726