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SOLARISATION [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2022-04-01

English

Subject field(s)
  • Organic Farming
  • Animal Pests (Crops)
DEF

… the practice of controlling pests by covering irrigated soil with clear plastic tarps, using solar energy to heat soils to lethal temperatures.

Key term(s)
  • soil solarisation

French

Domaine(s)
  • Agriculture biologique
  • Animaux nuisibles aux cultures
CONT

La solarisation du sol est une méthode non pesticide pour lutter contre les parasites du sol en plaçant des feuilles de plastique sur un sol humide pendant les périodes de température ambiante élevée. Les feuilles de plastique permettent à l'énergie rayonnante du soleil d’être emprisonnée dans le sol, ce qui réchauffe les niveaux supérieurs.

Spanish

Save record 1

Record 2 2012-10-16

English

Subject field(s)
  • Photography
DEF

The formation of a positive image on a developed photographic plate or film exposed to diffuse light ...

CONT

When a partly developed image is briefly exposed to actinic light, the final developed image becomes reversed. This is because in areas where the negative image had started to form, the emulsion is desensitized by the oxidation products of development. The result is that the extra exposure affects only the shadow areas of the original negative so that the final image is a positive. This type of reversal is known as the Sabattier effect, after its discoverer.

OBS

... the image is formed by exposure of silver halide in undeveloped regions of the emulsion.

French

Domaine(s)
  • Photographie
DEF

[...] technique photographique particulière qui permet de souligner les contours et d’inverser certaines valeurs [...]

OBS

Ce procédé [«effet Sabattier»], communément appelé, d’une manière impropre, «solarisation», donne à l'épreuve les qualités d’un négatif et d’un positif conjugués. Il ajoute également des lisérés dégradés par inversion [...] Strictement parlant, cette technique de tirage n’ a rien de commun avec une solarisation. La véritable solarisation intervient lorsque le film, et non le papier de tirage, est fortement surexposé. Cette forte surexposition engendre une réaction curieuse et complexe dans les cristaux sensibles, qui renverse pratiquement le mécanisme de la photographie normale; l'image apparaît en positif et non plus en négatif.

Spanish

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Record 3 2012-09-20

English

Subject field(s)
  • Photography
DEF

The reversal of a photographic image due to great overexposure.

CONT

Strictly speaking, solarization is the reversal of the image on a film or plate by an extreme amount of over-exposure - about 1,000 times the amount required to give a normal negative image on development.

OBS

The term has by this time almost lost its original meaning. Nowadays it is applied ... to the technique for producing a partly reversed image by exposing the negative to unsafe light during development -actually, the phenomenon known as the "Sabattier effect."

Key term(s)
  • solarisation

French

Domaine(s)
  • Photographie
CONT

Lorsque l'exposition est très supérieure à l'exposition optimale, il y a réhalogénation de l'image latente; ce phénomène porte le nom de «solarisation».

OBS

Dans la littérature photographique pratique ou artistique, ce terme [solarisation] est employé avec une signification différente, liée à une technique photographique particulière qui permet de souligner le contours et d’inverser certaines valeurs : c'est, correctement désigné, l'«effet Sabattier».

Spanish

Save record 3

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