Color photographic materials with better (green) sharpness have tabular crystal layers with defined crystal thickness relationships and green-sensitive layer further than red-sensitive layer from transparent support
Same sensitivity class red-sensitive, blue-green coupling (BG-1) and green-sensitive, magenta coupling (PP-1) Ag halide emulsions in a color photographic material with PP-1 further from the transparent support than BG-1 are such that (a) BG-1 and PP-1 each have \-50% of their projected surfaces of t...
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Main Authors | , , , , , |
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Format | Patent |
Language | English German |
Published |
25.04.2002
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Edition | 7 |
Subjects | |
Online Access | Get full text |
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Summary: | Same sensitivity class red-sensitive, blue-green coupling (BG-1) and green-sensitive, magenta coupling (PP-1) Ag halide emulsions in a color photographic material with PP-1 further from the transparent support than BG-1 are such that (a) BG-1 and PP-1 each have \-50% of their projected surfaces of tabular crystals of aspect ratio \-2; and (b) the average crystal thickness of the tabular crystals in BG-1 is \-50nm and is \-30% lower than for the PP-1 tabular crystals. A color photographic material with the following Ag halide emulsion layers (i) blue-sensitive, largely yellow coupling, (ii) red-sensitive, largely blue-green coupling (BG-1) and (iii) green-sensitive, largely magenta coupling (PP-1) such that PP-1 is further from the transparent support than BG-1 and these latter 2 emulsions are of the same sensitivity class, is characterized by (a) emulsions BG-1 and PP-1 each having \-50% of their projected surfaces of tabular crystals of aspect ratio \-2; and (b) the average crystal thickness of the tabular crystals in BG-1 being \-50nm and being \-30% lower than for the PP-1 tabular crystals.
Ein farbfotografisches Material mit einem transparenten Träger, wenigstens einer blauempfindlichen, überwiegend gelbkuppelnden Silberhalogenidemulsionsschicht, wenigstens einer grünempfindlichen, überwiegend purpurkuppelnden Silberhalogenidemulsionsschicht (PP-1) und wenigstens einer rotempfindlichen, überwiegend blaugrünkuppelnden Silberhalogenidemulsionsschicht (BG-1), wobei PP-1 weiter von dem Träger entfernt angeordnet ist als BG-1 und die Silberhalogenidemulsionen in PP-1 und BG-1 der gleichen Empfindlichkeitsklasse angehören, dadurch gekennzeichnet, dass die Silberhalogenidemulsionen in PP-1 und BG-1 jeweils zu wenigstens 50% der projizierten Fläche aus tafelförmigen Kristallen mit einem Aspektverhältnis von wenigstens 2 bestehen, die mittlere Kristalldicke der tafelförmigen Kristalle in BG-1 wenigstens 50 nm beträgt und um wenigstens 30% geringer ist als die der tafelförmigen Kristalle in PP-1, zeichnet sich durch eine verbesserte Schärfe, insbesondere durch eine verbesserte Grün-Schärfe, aus. |
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Bibliography: | Application Number: DE2000146244 |