A blueprint is a reproduction of a technical drawing or engineering drawing using a contact print process on light-sensitive sheets. Introduced by Sir John Herschel in 1842, the process allowed rapid and accurate production of an unlimited number of copies. It was widely used for over a century for the reproduction of specification drawings used in construction and industry. The blueprint process was characterized by white lines on a blue background, a negative of the original. The process was not able to reproduce color or shades of grey.
The process is now obsolete. It was first largely displaced by the diazo whiteprint process, and later by large-format xerographic photocopiers. It has almost entirely been replaced with digital computer-aided construction drawings.
The term blueprint continues to be used less formally to refer to any floor plan (and even less formally, any type of plan). Practising engineers, architects, and drafters often call them "drawings", “prints”, or “plans”.
The blueprint process is based on a photosensitive ferric compound. The best known is a process using ammonium ferric citrate and potassium ferricyanide. 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. The image is then developed using a solution of potassium ferricyanide forming insoluble ferroferricyanide (Prussian blue or Turnbull's blue) with the divalent iron. Excess ammonium ferric citrate and potassium ferricyanide are then washed away. The process is also known as cyanotype.
This is a simple process for the reproduction of any light transmitting document. Engineers and architects drew their designs on cartridge paper; these were then traced on to tracing paper using India ink for reproduction whenever needed. The tracing paper drawing is placed on top of the sensitized paper, and both are clamped under glass, in a daylight exposure frame, which is similar to a picture frame.
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A house is the simple topic of this studio. A matter of simple complexity. Starting from a movie depicting ways of living and a framed reference about materials, defining a fragment; redrawing a house
A house is the simple topic of this studio. A matter of simple complexity. Starting from a movie depicting ways of living and a framed reference about materials, defining a fragment; redrawing a house
This course will introduce students to recent works and advancements in the history of science which will provide them with the necessary background to articulate historical questions and to understan
Un dessin d'architecture ou plan de masse est un dessin de tout type et nature, utilisé dans le domaine de l'architecture. C'est généralement une représentation technique d'un bâtiment qui associée à d'autres, permet une compréhension de ses caractéristiques, qu'il soit une construction édifiée ou seulement en projet. Ainsi, divers plans forment le cœur d'un dossier de demande d'un permis de construire. Un dessin d'architecture est toujours une mise en application de principes géométriques, de considérations esthétiques et d'exigences pratiques ; l'ensemble étant encadré par des conventions.
Le terme blueprint désigne, en anglais, une reproduction d'un plan détaillé, ce que l'on appelle en dessin technique un dessin de définition. Le terme, signifiant littéralement « impression en bleu », provient d'un procédé d'imprimerie, la cyanotypie, puis la diazographie. Ce terme, en tant qu'anglicisme, est utilisé dans certains domaines pour désigner une représentation spatiale d'un objet, selon un ou plusieurs points de vue définis par les standards du dessin industriel ou du dessin architectural (vue de face, de droite, de gauche, de dessus, de dessous, de derrière).
An engineering drawing is a type of technical drawing that is used to convey information about an object. A common use is to specify the geometry necessary for the construction of a component and is called a detail drawing. Usually, a number of drawings are necessary to completely specify even a simple component. The drawings are linked together by a master drawing or assembly drawing which gives the drawing numbers of the subsequent detailed components, quantities required, construction materials and possibly 3D images that can be used to locate individual items.
Explore la structure de l'examen oral et les sujets clés de la photochimie II, y compris les processus de transfert d'électrons et la photo-électrochimie des semi-conducteurs.