It shows the placement of fixtures, appliances and openings such as doors and windows. What is the difference between a blueprint and a plan?Ī plan is a scaled drawing of a building or a part of it. The blueprinting process can be termed as obsolete as it has been replaced by large-format xerographic photocopiers. The digital images can then be transferred to builders and other professionals in the construction environment. In present times, it is no longer a necessity that architects or engineers print their drawings onto paper as they can easily be displayed digitally. This process is what is now replicated in modern times by computer aided printing technologies. It started out in the 1940s when the original blueprint being replaced by blue lines on white paper. There have been a lot of modern day processes and technologies used to replace blueprinting. They create accurate negative reproductions of original drawings. When compared to the cost of large-format copying machines, it is considered a great bargain.īlueprints are also preferred as they are less time consuming and easily recognizable as a result of the blue background colors and white lines. The major purpose of an architectural blueprint is to reproduce large drawings, and a reason why it is still being used is its inexpensiveness. What is the purpose of an architectural blueprint? Petri dish, tongs, white paper, a small opaque object such as a coin, leaf or key, 15 ml of 10% potassium hexacyanoferrate (III) (potassium ferricyanide), 15 ml of 10% iron (III) ammonium citrate solution. These are the materials required for making blueprint paper: What is blueprint paper?īlueprint paper is paper that is specially coated and turns blue when certain areas are exposed to light. Even after the introduction of carbon copying and the use of copier machines, professionals in the built environment continued to use this method for large scale drawings. The process was considered to be quicker and less expensive than hand-tracing. This leaves a negative white image against a dark blue background. The parts that end up not being blue are those covered, where light is blocked by the lines of the original drawing. The two papers, when placed together and exposed to bright light, causes the chemicals to react and form a blue compound called blue ferric ferrocyanide. The mix is derived from an aqueous solution and is left out to dry. This is then placed on paper that has been coated with ammonium iron citrate and potassium ferrocyanide: the blueprinting paper. It starts out with creating a drawing on translucent tracing paper. The process of making blueprints is what gives it the distinct color. This process was widely used for over a century, and though not as common anymore, the word ‘blueprint’ is still popular among architects, engineers, drafters and construction workers to refer to floor plans. Blueprints were introduced by Sir John Herschel in 1842 and were a means of quickly and accurately producing unlimited copies of drawings. Blueprints are used for the reproduction of architectural or engineering drawings by a contact print process on sheets that are light-sensitive.
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