摘要
银影分散法增强照相影像是基于通过氧化还原反应 ,使再次形成的银影像颗粒缩小到原颗粒的约 1/100，提高银遮盖力从而增强照相影像。明胶层中来自卤化银晶格的银离子 Ag＋ 在非催化还原过程中的络合作用决定银颗粒缩小程度，因而也是决定银遮盖力的关键因素。银离子的络合作用受乳剂层结构和经常规方法显影后生成的影像银氧化还原条件的影响。 本方法突出的特点是通用性和高效性 ,各种用途的黑白卤化银感光材料 ,包括工业和医用胶片，它们对电离辐射感光度可以提高 6～ 8倍 ,并保持影像原有的细部的分辨能力。
The physical conten of the processes under consideration consists in the suffisient decrease of siver particle size(up to 102 times)which form the image in the gelation matrix as a result of oxidating- reducing transformations .The main factor that determines the particle size diminishing degree and respectively ,the value of silver covering power ,is the dominance of complexation with participation of Ag＋ ions from AgX lattice over the process of non- catalytic chemical reduction of these ions in the gelation layer.The latter is a function of emulsion layer structure and conditions of oxidating- reducing treatment of the layer which has been developed previously by conventional method The important feature of this process is the universality and the high efficiency providing 6～ 8 times increase of sensitivity with respect to light (ionizing radiation)for black- and- white silver halide materials for various purposes(radiographic films of technical and medical purposes,photographic and phototechnical films)maintaining their ability to resolve small details of image.
出处
《信息记录材料》
2000年第3期1-5,59,共5页
Information Recording Materials
