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ELIMINATION HYPOSULFITE [2 records]

Record 1 2016-02-26

English

Subject field(s)
  • Photography
DEF

Solution (typically dilute hydrogen peroxide and ammonia) which converts traces of sodium thiosulphate left in prints after a relatively brief wash into harmless sodium sulphate. Used to shorten, with safety, the time required for adequate washing.

Key term(s)
  • hypo neutraliser

French

Domaine(s)
  • Photographie
DEF

Produit dont la solution peut être utilisée dans une étape supplémentaire précédant le lavage pour détruire l'hyposulfite résiduel ou en accélérer l'élimination.

OBS

Ces produits permettent de réduire à quelques minutes le lavage des clichés.

Spanish

Save record 1

Record 2 1985-11-04

English

Subject field(s)
  • Photography
DEF

The use of a bath (e.g., a mixture of hydrogen peroxide and ammonia) that converts residual hypo into substances that will not react with the silver image and can be easily removed by washing.

OBS

In a broader sense, hypo elimination also includes the use of an alkaline or salt bath that increases washing effectiveness without reacting with the sodium thiosulfate or other fixing agent.

French

Domaine(s)
  • Photographie
DEF

Traitement utilisé pour neutraliser l'hyposulfite dans une émulsion ou pour accélérer son élimination.

Spanish

Save record 2

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