Vellum paper is a modern support chiefly used for tracing technical drawings, plans, and maps. It is semi-translucent relative to its thickness, and it is available in semi-gloss and matte finishes. Vellum paper has an ivory or frosted quality. Over time, plasticizing agents have shifted from oils to resins to composites. Specifically, it is a synthetic paper product made from plasticized wood pulp or cotton fibers. Vellum paper is a stiff or coated semi-transparent paper, not actual animal skin as the name suggests. Courtesy of the Chicago History Museum: Holabird & Root - Chicago Motor Club - Architectural records for buildings by Holabird & Root, 1979.242 ATlot Note the semi-transparent quality of the support. By 1900, rag paper (cotton, linen) had been pushed to specialty markets, and most paper was made from wood pulp. The quality of materials also varied considerably in this period as wood pulp paper emerged as a cheap alternative to rag paper. The late 19th century introduced a wide array of surface textures, opacity, and tints. Semi-translucent tracing paper aided in the professional reproduction of technical drawings before photo-reproductive processes and mechanical and chemical productions began to proliferate in the 1880s. Regardless of the paper’s function, tracing, or printing, the basic composition is often similar. Paper supports of large-scale drawing reproduction will vary to extremes. See the Paper profile for further information. Here are a few that are typically associated with architectural/technical drawings and reproductions. When we talk about support materials, we are talking about the layer that acts as the carrier for the image material and visual information. Architectural/Technical Drawing Reproduction: Support Materials
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