GB285035A - - Google Patents

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Publication number
GB285035A
GB285035A GB285035DA GB285035A GB 285035 A GB285035 A GB 285035A GB 285035D A GB285035D A GB 285035DA GB 285035 A GB285035 A GB 285035A
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United Kingdom
Prior art keywords
image
reactions
couleurs
dorian
reversal
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Publication of GB285035A publication Critical patent/GB285035A/en
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  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

285,035. Soc. Francaise de Cinematographie et de Photographie Films en Couleurs-Dorian, (formerly Soc. du Film en Couleurs Keller-Dorian). Feb. 9, 1927; [Convention date]. Colour photography; developing and after treament.-In the reproduction, by optical projection followed by reversal of the developed copy, of original colour-record images made by exposure and development followed by reversal on lenticular films, a copy is produced having contrasts equal to those, of the original image by transforming this image, before copying, into an image having reduced contrasts by subjecting it to known reactions which, unlike the ordinary reducing reactions, terminate automatically. Such reactions may comprise toning the silver image either chemically or by mordant dyeing, or conversion of the silver into chloride, bromide,- iodide, or ferrocyanide.
GB285035D Active GB285035A (en)

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GB285035A true GB285035A (en)

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ID=1741123

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GB (1) GB285035A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220118A (en) * 1961-12-27 1965-11-30 Gen Am Transport Systems for treating agglomerated products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220118A (en) * 1961-12-27 1965-11-30 Gen Am Transport Systems for treating agglomerated products

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