TERMIUM Plus®

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HERSCHEL EFFECT [2 records]

Record 1 1987-03-24

English

Subject field(s)
  • Photography
DEF

[A] sensitised paper generally used for contact document copying, yielding a positive copy of a positive original.

OBS

For example : silver halide paper prefogged during manufacture is exposed direct or by reflex printing using yellow light which, as a result of the Herschel effect, destroys the latent fog in areas corresponding to the white background....

French

Domaine(s)
  • Photographie
CONT

Les papiers pour le développement de positifs directs comportent des émulsions extra-dures très lentes - aussi lentes que les papiers diazo [...]. Le développement automatique des papiers positifs directs pose des problèmes qui peuvent être résolus par l'emploi de monobains [...].

Spanish

Save record 1

Record 2 1975-03-11

English

Subject field(s)
  • Photography
  • Optics
OBS

--ability of red or infrared radiations to bleach out a latent image previously formed in on emulsion otherwise insensitive to this region of the spectrum.

French

Domaine(s)
  • Photographie
  • Optique
OBS

--consiste en une destruction plus ou moins partielle de l'image latente par des radiations de plus grandes longueurs d'onde que celles qui (...) ont donné naissance à cette image latente.

Spanish

Save record 2

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