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The blueprint process is based on a photosensitive ferric compound. The best known is a process using ammonium ferric citrate and potassium ferricyanide. [6] [7] The paper is impregnated with a solution of ammonium ferric citrate and dried. When the paper is illuminated, a photoreaction turns the trivalent ferric iron into divalent ferrous iron.
Bond paper is a high-quality durable writing paper similar to bank paper but having a weight greater than 50 g/m 2. The most common weights are 60 g/m 2 (16 lb), 75 g/m 2 (20 lb) and 90 g/m 2 (24 lb). The name comes from its having originally been made for documents such as government bonds.
Cyanotype, also referred to as "blueprinting", is the oldest non-silver photographic printing process. [1] It involves exposing materials which have been treated with a solution of potassium ferricyanide and ferric ammonium citrate to a UV light source such as the sun.
Whiteprinting replaced the blueprint process for reproducing architectural and engineering drawings because the process was simpler and involved fewer toxic chemicals. A blue-line print is not permanent and will fade if exposed to light for weeks or months, but a drawing print that lasts only a few months is sufficient for many purposes.
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A blueprint is a large-format reproduction, usually of an architectural or engineering plan. Blueprint may also refer to Books and print media
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A US defense agent scanning in architectural documents. Architectural reprography, the reprography of architectural drawings, covers a variety of technologies, media, and supports typically used to make multiple copies of original technical drawings and related records created by architects, landscape architects, engineers, surveyors, mapmakers and other professionals in building and ...