奥地利达盖尔肖像的表面特征

IF 3.5 2区 综合性期刊 0 ARCHAEOLOGY
Valentina Ljubić Tobisch , Klaudia Hradil , Karin Whitmore , Christina Streli , Peter Wobrauschek , Wolfgang Kautek
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引用次数: 0

摘要

我们使用数码光学显微镜、扫描电子显微镜和 µ-X 射线荧光技术对奥地利收藏的 1841 年至 1850 年的六幅达盖尔银版画进行了研究。这样就能观察到腐蚀状态、不同生产步骤造成的表面特征、可能的保存干预措施和储存条件。研究了银汞合金和金汞合金小板以及图像纳米颗粒的形态和尺寸分布。小板的直径在 1 到 2 微米之间。图像颗粒具有结晶形态,直径为 200-400 纳米。银涂层的晶粒尺寸为 40-160 纳米。将达盖尔原型表面长期暴露在指纹汗液中会导致局部的银表面区域转变为尺寸为微米量级的氯化银结晶。在一个样品中,腐蚀导致银层从铜基板上脱落,在暴露的铜基板上形成一个凹坑,周围是完整的银表面。在另一种情况下,碱性碳酸铜的绿色腐蚀产物体积增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Surface characterization of Austrian daguerreotype portraits

Surface characterization of Austrian daguerreotype portraits
Six daguerreotypes from Austrian collections dating from 1841 to 1850 were examined using digital light microscopy, scanning electron microscopy and µ-X-ray fluorescence. This enabled the observation of corrosion states, surface features due to different production steps, possible conservation interventions and storage conditions. The morphology and size distribution of Ag-Hg and Au-Hg-Ag amalgam platelets and image nanoparticles were studied. The platelets ranged in diameter from 1 to 2 µm. The image particles featured a crystalline morphology with diameters of 200–400 nm. The Ag coating grain size was 40–160 nm. Long-term exposure of the daguerreotype surface to fingerprint sweat caused the transformation of local Ag surface areas into AgCl crystallites with sizes of the order of µm. interestingly, in two samples, the pupils of the eyes were scratched with a needle, which was intended to increase the three-dimensionality of the eyes. In one case, corrosion caused the Ag layer to detach from the copper substrate, creating a crater on the exposed Cu substrate surrounded by the intact Ag surface. In another case, a greenish corrosion product of basic Cu carbonate with increased volume occurred.
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来源期刊
Journal of Cultural Heritage
Journal of Cultural Heritage 综合性期刊-材料科学:综合
CiteScore
6.80
自引率
9.70%
发文量
166
审稿时长
52 days
期刊介绍: The Journal of Cultural Heritage publishes original papers which comprise previously unpublished data and present innovative methods concerning all aspects of science and technology of cultural heritage as well as interpretation and theoretical issues related to preservation.
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