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Original Articles

Partial Inactivation of Aldehydes of Photographic Gelatin by the Sulphur Dioxide Associated with this Material

Pages 84-86 | Received 31 Dec 1981, Published online: 21 Jul 2016
 

Abstract

Every pholographic gelatin contains aldehyde precursors which decompose under severe environmental conditions. Thc aldehydes released are wholly or partially, according to the conditions, inactivated by the sulphur dioxide associated with the gelatin. The efficiency of the inactivation decreases in the order: Formaldehyde> Melhylglyoxal> Malonicaldehyde.

Résumé

Les gélatines photographiques contiennent des précurseurs d’aldéhydes qui se décomposent sous des influences diverses. Les aldéhydes libérés sont totalement ou partiellement, selon les conditions, neutralisés par l’anhydride sulfureux (SO2) de la gélatine. L’efficacité de la neutralisation décroit dans l’ordre: Ald, formique> Méthylglyoxal> Ald, malonique.

Zusammenfassung

Alle fotografischen Gelatinen enthalten Aldehyd-Vorstufen, die sich bei starker Belastung des Systems zersetzen. Die entstehenden Aldehyde werden - je nach den vorliegenden Bedingungen - ganz oder teilweise durch das in der Gelatine vorhandene Schwefeldioxid inaktiviert. Die Wirksamkeit der Inaktivierung nimmt in der Reihenfolge: Formaldehyd> Methylglyoxal> Malonsäurealdehyd ab.

Riassunto

Ciascuna gelatina fotografica contiene dei precursori di aldeidi che, in condizioni ambientali particolarmente severe, si decompongono. Le aldeidi liberate vengono, totalmente o in parte a seconda References delle condizioni, inattivate dall’anidride solforosa presente nella gelatina. L’efficienza dell’inattivazione decresce nell’ordine: Formaldeide>Metilgliossale> Aldeide malonica.

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