Latent Image Reactions with Mercuric Chloride^*

* Communication No. 214711 from The Kodak Research Laboratories.

Abstract

Destruction of surface latent image by mercuric-chloride solutions proceeds by a reduction of photographic speed obtaIned on subsequent development. in contrast to the loss of slope of the characteristic curve produced by most other surface latent-image bleaches. On gold-sensitized emulsions only port of the latent image could be bleached. and the proportion of resistant image increased with lengthening exposure lime. No such resistant lotent image could be detected with ferricyanide. cupric-bromide or acid dichromate bleoches, and these other solutions ottacked gold-silver alloys containing sufficient gold to protect them against corrosion by mercuric chloride. Other results suggested that gold enters the latent image from gold ions very firmly attached to the groins.

Notes

* Communication No. 214711 from The Kodak Research Laboratories.