Development processing method of ultrahigh-contrast black-and-wh

Details Development processing method of ultrahigh-contrast black-and-wh Development processing method of ultrahigh-contrast black-and-wh

1996-12-16

1998-08-25

Bell, Mark L.

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

Developer

430264, 430438, 430439, 430465, 430481, 430482, 430492, 430598, G03C 518, G03C 526, G03C 106, G03C 100

Patent

active

057982040

ABSTRACT:
A development processing method is described, which includes the steps of (a) exposing an ultrahigh-contrast silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer and (b) developing the exposed silver halide photographic material with a developer while the developer is replenished with a development replenisher, wherein the developer and the development replenisher each contains a dihydroxybenzene developing agent and an auxiliary developing agent exhibiting a superadditive property to the dihydroxybenzene developing agent, and both the developer and the development replenisher have such a property that an increase of the pH is 0.25 or less when 0.1 mol of sodium hydroxide is added to 1 liter thereof; the developer has a pH from 9.5 up to but excluding 11.0; and the developer replenisher is added in an amount of 225 ml/m.sup.2 or less.

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