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COMPOSE DIAZOIQUE [1 record]

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Record 1 2001-09-27

English

Subject field(s)
  • Chemical Elements and Compounds
  • Reprography
CONT

Whereas blueprint reproductions are negatives of an original drawing, the diazo (whiteprinting) process provides positive images like those of blue-line prints, except the lines can be of almost any color on a white background. The paper is coated with a diazo compound that is sensitive to ultraviolet light.

Key term(s)
  • diazo-compound

French

Domaine(s)
  • Éléments et composés chimiques
  • Reprographie
CONT

On fait réagir les nitrites ainsi formés avec du sulfanilamide, en milieu acide, pour obtenir un composé diazoïque qui, lorsqu'il est mélangé avec de la N-(1-napthyl)-éthylènediamine, forme un complexe de couleur rouge.

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Reprografía
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