blueprint

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blueprint,

white-on-blue photographic print, commonly of a working drawing used during building or manufacturing. The plan is first drawn to scale on a special paper or tracing cloth through which light can penetrate. The drawing is then placed over blueprint paper, prepared with a mixture of potassium ferricyanide and ammonium ferric citrate. When the attached drawing and the blueprint paper are exposed to a strong light, the unprotected ferric salt not lying beneath the lines of the drawing is changed to a ferrous salt that reacts with the ferricyanide to form Turnbull's blue. This blue is the background of the finished print. The ferric salt under the lines of the drawing, protected from the light, remains and is dissolved during the washing in water that follows exposure. As a result, the lines of the original drawing appear white in the finished blueprint.
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Blueprint

A reproduction of a drawing by a contact printing process on light-sensitive paper, producing a negative image of white lines on a blue background; refers to architectural working drawings for construction.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

blueprint

[′blü‚print]
(graphic arts)
A contact print, with white lines on a blue background, of a drawing; made on linen or on ferroprussiate paper and developed in water or a special solution.
A photoprint used in offset lithography or photoengraving for use in checking positions of image elements.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

blueprint

a photographic print of plans, technical drawings, etc., consisting of white lines on a blue background
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Process Area Blueprinting began in mid-October 2007.
So what is ahead for blueprinting? In 2008, there are already ten scheduled blueprinting sessions through June 2008 with more work expected through October 2008.
So the next time you are out and about and hear someone talking about blueprinting, you need not think about it in the narrow terms of civil engineering.
The Business Blueprinting scheme that Unisys has come up with aims to solve this problem, which is just as costly to a business in terms of lost IT dollars as having cranky, incompatible systems that take boatloads of people to manage.
According to Fred Dillman, vice president of technology and architecture for Unisys' Global Industries unit, Business Blueprinting creates digital descriptions of business processes and IT infrastructure that companies can play with to see where there are redundancies in their systems and processes that can be streamlined to cut costs and improve customer service.
"IBM's world-class development tools and recognized WebSphere capabilities, combined with our Business Blueprinting methodology, provide a unique, powerful solution to our clients," said Joe McGrath, president of Unisys Enterprise Transformation Services.