blueprint

blueprint
blueprinter, n.
/blooh"print'/, n.
1. a process of photographic printing, used chiefly in copying architectural and mechanical drawings, which produces a white line on a blue background.
2. a print made by this process.
3. a detailed outline or plan of action: a blueprint for success.
v.t.
4. to make a blueprint of or for.
[1885-90; BLUE + PRINT]

* * *

  type of print used for copying engineering drawings and similar material. The name is popularly applied to two separate methods, more exactly designated as the blueprint and the whiteprint, or diazotype. In blueprinting, the older method, the drawing to be copied, made on translucent tracing cloth or paper, is placed in contact with paper sensitized with a mixture of ferric ammonium citrate and potassium ferricyanide, which is then exposed to light. In the areas of the sensitized paper not obscured by the lines of the drawing, the light reduces the ferric salt to the ferrous state, in which it reacts with the potassium ferricyanide to form insoluble prussian blue. The exposed paper is then washed in water, producing a negative in which the lines of the drawing appear in white against a dark blue background.

      In the whiteprinting method, the paper is sensitized with a mixture of a diazonium salt, a coupler that reacts with the diazonium salt to form an azo dye, and an acid that prevents coupling. Exposure to light destroys the diazonium salt. Final treatment with an alkaline agent, such as ammonia gas, neutralizes the acid, thereby bringing about the coupling reaction. Because it produces dark lines on a “white” or light background, whiteprinting has become the favoured method.

* * *


Universalium. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • blueprint — blue‧print [ˈbluːˌprɪnt] noun [countable] 1. a plan for achieving or improving something: • an economic blueprint calling for new investment in training and infrastructure blueprint for • Labour s blueprint for an integrated transport system 2. a …   Financial and business terms

  • Blueprint — Saltar a navegación, búsqueda Para otros usos de este término, véase Blueprint (dibujo técnico). Blueprint es un rapero y productor de Columbus, Ohio. Es el dueño de Weightless Recordings y firmó también por Rhymesayers Entertainment. Blueprint… …   Wikipedia Español

  • Blueprint — bezeichnet: einen Bauplan, siehe Blaupause ein fotografisches Kopierverfahren, siehe Cyanotypie Blueprint (Dienstleistungsmarketing), Abbild eines Dienstleistungsprozesses sowie seiner Teilaktivitäten Blueprint (Film), deutsche Verfilmung des… …   Deutsch Wikipedia

  • Blueprint 76 — is a Detroit pop punk group started in 2002 by Royce Nunley after 8 years in The Suicide Machines. The band s original lineup consisted of Royce Nunley on lead vocals, Steve Toth on guitar and Joe Rielly on drums. Joe Joey Danger Rielly moved… …   Wikipedia

  • Blueprint — Blueprint  это CSS фреймворк, созданный для сокращения времени разработки при работе с CSS, важной особенностью которого является использование сетки. Особенности сброс css для устранения расхождения отображения в разных броузерах сетка… …   Википедия

  • blueprint — n sketch, draft, tracing, plot, diagram, delineation, outline (see under SKETCH vb) blueprint vb *sketch, draft, trace, plot, diagram, delineate, outline …   New Dictionary of Synonyms

  • blueprint — [blo͞o′print΄] n. 1. a photographic reproduction in white on a blue background, as of architectural or engineering plans 2. any exact or detailed plan or outline vt. to make a blueprint of …   English World dictionary

  • Blueprint — Blue print See under {Print}. [1913 Webster] …   The Collaborative International Dictionary of English

  • blueprint — I noun design, detailed plan, diagram, draft, ground plan, map, master plan, mechanical drawing, outline, plan, scheme, sketch II index agenda, arrange (plan), delineate, delineation …   Law dictionary

  • blueprint — (n.) also blue print, 1882, from BLUE (Cf. blue) (1) + PRINT (Cf. print) (n.). The process uses blue on white, or white on blue. Figurative sense of detailed plan is attested from 1926. As a verb by 1939 …   Etymology dictionary

  • blueprint — (izg. blȗprȉnt) m DEFINICIJA tisk. fotografskim procesom dobiveni otisak tehničkog nacrta na posebnom papiru; nacrt, predložak ETIMOLOGIJA engl …   Hrvatski jezični portal

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”