This paper discusses the technical difficulties which may be encountered in the visualization indispensable in the localization and dating of papers and the investigation of watermarks. Modern digital techniques for visualizing obscured watermarks in historical documents are discussed. The advantages and disadvantages of the various digital methods will be presented and special attention will be devoted to the discriminating between writings and drawings and the underlying watermarks. As a new diagnostic method the use of heat radiation in the medium and long infrared spectrum is suggested: this creates an image of heat transmission in the medium due to the different densities and thickness variations in the paper. This type of recording is ecological, conservational and presents no health risks to the persons concerned. It can also be documented and communicated for any purpose with little expenditure of time and at high resolution. Copyright © 2009 Saur.
CITATION STYLE
Meinlschmidt, P., & Märgner, V. (2009). Advantages and disadvantages of various techniques for the visualization of watermarks. Restaurator, 30(3), 222–243. https://doi.org/10.1515/rest.014
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