6/10/2023 0 Comments Illuminated manuscripts![]() ![]() This fact also has to be taken into account when cleaning dirt from the image and when encapsulating or framing illuminated parchment for an exhibition. ![]() Pressing an illuminated manuscript pushes the pigment down, altering the image itself and likely causing damage (such as a relief effect to the other side of the page) so it is very important to not put any pressure upon images on parchment, especially when it is wet. These problems are further compounded by the fact that pigments do not dye parchment instead, they lie on the surface of the parchment and so are rather fragile. For example, collagen in the pages could dissolve and stick together. Problems can occur when parchment is exposed to high humidity for a long period of time. Pigments add another layer to the problem, forcing a preservationist to fit environmental conditions to two different (and possibly conflicting) sets of ideal limits. As such, environmental conditions such as humidity must be kept under control. It is even possible to analyze a pigment beneath a glaze or other treatment. Unlike other non-invasive identification techniques the results of Raman spectroscopy are much more certain. This works on the notion that every substance interacts with radiation in different ways, and these differing ways if measured can help identify the substance without having to take a sample. Raman spectroscopy analyzes the molecular vibrations of the pigments and uses this data to map out its chemical makeup.
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