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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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.


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


(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.


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 ?
BluePrint Data OEMs its URL / Web site content filters, technology, and security products and services to Internet Security vendors such as Unified Threat Management (UTM), Managed Service Providers (MSP), Managed Security Service Providers (MSSP) and Software as a Service (SaaS) providers as well as providing private label / OEM services to Value Added Resellers (VARs), Information Technology Providers, Anti-Virus and Anti-Spam service providers, Independent Software Vendors (ISVs), and telecom, carriers, and ISPs and other companies.
This palette includes Blueprint S470-5, Ecological S380-6, Amber Autumn S290-5, Raisin In The Sun N120-6 and Vine Leaf N400-7.
The MammaPrint Blueprint next-generation sequencing-based kit is a CE-marked device currently available for use in cancer centers in select regions of the world.
Blueprint RF supplies network solutions to the hospitality and travel industry with proprietary solutions and services that integrate technology.
Aside from this, she said the blueprint will highlight changes that will be included in the amendment of both of the Securities and Regulation Code and the Code of Corporate Governance.
Not realising aspects of your blueprint isn't a sign of failure; it occurs more as a result of responding and adjusting to the multitude of choices and decisions we constantly face.
Manufacturers refuse to provide blueprints and American Gunsmith has never had them inventoried.
The blueprint focuses on the topics of education, agriculture, new cities, industry, employment, governance, culture, new societies and toll.
The blueprint (1)is drawn up totally in keeping with Directive 2000/60.
"An application blueprint provides a templating language that describes how to instantiate an application in the cloud," Che said.
Platform: iPhone/iPad Genre: Puzzle Price: pounds 0.69 ASIN: N/A If you're looking for an all-new iPhone experience, Blueprint 3D will tick all the boxes.
The authors focus on one specific technique, service blueprinting, which facilitates collaboration among key contributors and stakeholders involved across a broad customer experience to create a visual depiction, or blueprint, of a service.