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Original Articles

Granularity of Electrophotographic ImagesFootnote

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Pages 154-158 | Received 20 Oct 1976, Published online: 22 Jul 2016
 

Abstract

The granularity of electrophoretic developed images is discussed. The monolayer model which fits very well for powder cloud development is not adequate for electrophoretic developed images. Preference should be given to the multi-layer model which follows the Siedentopf relationship.

A lowering of the granularity level by fix is observed.

A comparison has been made of calculated and observed particle diameters.

Resume

La granularité d’images électrophorétiques développees est discutée. Le modéle à couche unique qui s’accorde trés bien avec Ie développement au nuage de poudre, n’est pas adapté aux images électrophorétiques développées. II faut préférer Ie modéle à couches multiples, qui permet de démontrer un parallélisme avec la théorie de Siedentopf. On observe I’abaissement du niveau de granularité par fixage. Des diamètres de particules calculés et observés sont comparés.

Zusammenfassung

Es wird die Körnigkeit entwickelter eleklrophoretischer Bilder besprochen. Das Einzelschichtmodell, das sich sehr gut für die Puderwolkentwicklung eignet, ist nicht für entwickelte elektrophoretische Bilder geeignel. Del Vorzug gilt dem Mehrschichtenmodell, das die Darlegung der Siedentopfschen Beziehung erlaubt. Die Erniedrigung des Körnigkeitsniveaus wird beobachtet durch Fixierung. Berechnete und beobachtete Teilchendurchmesser werden verglichen.

Riassunto

Si discute delle immagini elettroforetiche sviluppate. II modello monostrato che si adatta motto bene allo sviluppo a nuvola di polvere non e’ adatto per le immagini sviluppate elettroforeticamente.

Si deve preferire il tipo multistrato che consente la soddisfazione della relazione Siedentopf.

Si osserva l’abbassamento del livello di granularita’ al fissaggio. Si effettua il confronto tra i diametri di particelle calcolati e osservati.

Notes

Paper presented at a symposium on “electrophotography” organized by the Science ommitlee of The Royal Photographic Society 011 .12-17 September J976 in Cambridge, England.

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