The Coated Salted Paper Prints from the Eduard Isaac Asser Collection at the Rijksmuseum: FTIR and OCT Identification and Characterization

IF 0.7 4区 社会学 0 HUMANITIES, MULTIDISCIPLINARY
Rosina Herrera Garrido, Suzan de Groot, Tom Callewaert-Dore
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引用次数: 0

Abstract

ABSTRACT The Rijksmuseum holds four valuable albums with 187 photographs made by Eduard Isaac Asser (1809–1894), one of the first figures in photography in the Netherlands. Based on visual examination, most of these prints have been identified as salted paper prints with a coating, but they can be hard to distinguish from matte or glossy albumen prints, especially where the coating is thick. In order to be more accurate in our descriptions and to better understand Asser’s technique, a technical study of his work was conducted. Fourier transform infrared spectroscopy (FTIR) helped us to identify, to a certain extent, the nature of the coatings. Before the analysis, the prints had been described either as “shellac coated” or as “waxed,” based on their varying degree of sheen. FTIR identified a larger number of substances in the coatings: gum, protein, natural resin, and possibly starch. Optical coherence tomography (OCT) was also used to study the coatings. Because OCT has limitations when dealing with very thin layers, it was not always suitable for distinguishing coated salted paper prints from coated albumen prints. However, it did turn out to be a useful tool to explore the topography and structure of the paper supports and the coatings.
国立博物馆爱德华·艾萨克·阿塞收藏的涂布盐渍纸版画:FTIR和OCT鉴定和表征
荷兰国家博物馆收藏了四本珍贵的相册,其中有187张照片,由荷兰摄影界的先驱之一爱德华·艾萨克·阿塞尔(1809-1894)拍摄。根据视觉检查,大多数这些印刷品已被确定为带有涂层的盐纸印刷品,但它们很难与哑光或有光泽的蛋白印刷品区分开来,特别是在涂层较厚的地方。为了更准确地描述和更好地理解Asser的技术,我们对他的工作进行了技术研究。傅里叶变换红外光谱(FTIR)在一定程度上帮助我们确定了涂层的性质。在分析之前,根据它们不同程度的光泽,这些指纹要么被描述为“虫胶涂层”,要么被描述为“打蜡”。FTIR在涂层中发现了大量的物质:树胶、蛋白质、天然树脂,可能还有淀粉。光学相干层析成像(OCT)也对涂层进行了研究。由于OCT在处理非常薄的层时具有局限性,因此它并不总是适合于区分涂布盐纸印刷品和涂布蛋白印刷品。然而,它确实是一个有用的工具来探索纸支撑和涂层的地形和结构。
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来源期刊
CiteScore
1.30
自引率
0.00%
发文量
18
期刊介绍: The American Institute for Conservation is the largest conservation membership organization in the United States, and counts among its more than 3000 members the majority of professional conservators, conservation educators and conservation scientists worldwide. The Journal of the American Institute for Conservation (JAIC, or the Journal) is the primary vehicle for the publication of peer-reviewed technical studies, research papers, treatment case studies and ethics and standards discussions relating to the broad field of conservation and preservation of historic and cultural works. Subscribers to the JAIC include AIC members, both individuals and institutions, as well as major libraries and universities.
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