The technique is also described in Conservation Highlights on the Library of Congress Preservation Directorate website.Īfter second step of digital manipulation The handout and training videos are available on the BPG Annual Meeting Tips Sessions page. Valero presented the technique at the BPG Tips Session at AIC Annual in Houston. The following are examples of a technique developed by Claire Valero for enhancing transmitted light images. Images of watermarks can be dramatically improved by digital manipulation. ![]() ![]() Transmitted Light Multispectral Imaging Digital Manipulation of Watermark Images The method is detailed in their "Beta Radiography Protocols" ( Rivera Ramos and Broadway 2019). does not have to be carried out in total blackness), and a digital image that is easily manipulated with basic Image Pilot Konica software. Practically, these features translate into significantly shorter collection times (between 10-40 minutes, depending on the thickness of the support), a setup that is safer for the art (i.e. This offers several advantages including: a larger surface area, higher sensitivity to beta rays, lower sensitivity to visible light, and they are reusable. In 2018, the paper lab at the Art Institute of Chicago developed a protocol for beta radiography that replaces the Kodak film with phosphor-coated imaging plates. Beta Radiography ĬAMEO describes this technique in their page on Beta radiography. The Archive of Watermarks and Papers in Greek Manuscripts describes the procedure here.īeta radiograph. Gravell developed a system for imaging watermarks using Du Pont DYLUX® 503 photosensitive paper. ![]() Variants: Slightly different versions of similar watermarks.Years active Common symbols Measuring and Describing Watermarks Years active Common symbols Famous Papermakers and their watermarks Years active Common symbols * three circles with a crown or cross * Griffins holding a shield
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