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Architectural drawing, Germany, 1902 Architectural drawing, Canada, 1936. 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 ...
Blueprint is a Nigerian daily newspaper based in Abuja.The newspaper started as a weekly publication in May 2011, then switched to a daily paper in September 2011. The paper has two editions - the print edition published daily and the online edition which updates as events unfold.
Although drafting linen was most typically used in creating original drawings, it was occasionally used as the underlying support for blueprints and other similar reprographic processes. Drafting linen largely fell out of favor after the development of drafting film — varying in chemical composition from cellulose acetate to polyester —in ...
After sufficient light exposure, the glass and original drawing are removed and the blueprint paper is washed to reveal a negative image. This same process, using an intermediary reprographic drawing, could also be used to produce a positive blueprint—blue lines on a white ground—however, this more expensive and time-intensive method was ...
Next, the original is peeled from the diazo paper as the sandwich of master and diazo exits the machine, and the diazo sheet alone is fed into the developing chamber. Here, fumes of ammonium hydroxide create an extremely alkaline environment. Under these conditions, the azodyes (couplers) react with the remaining diazonium salt and undergo a ...
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