The action of hydrogen peroxide on photographic gelatino-silver halide emulsions

Sheppard, S. E.; Wightman, E.P.

doi:10.1016/s0016-0032(23)90744-1

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…The existence of sensitivity centers is supported by experimental evidence showing that the formation of discrete development centers is not necessarily connected with the action of light, but can also be produced by chemical agents, such as hydrogen peroxide, sodium hypophosphite, sodium arsenite, and others (14,15,16,19,97,100,116). Clark (17) found, further, that the sensitivity to arsenite could be destroyed by treatment with chromic acid in the same way as the sensitivity to light.…”

Section: B Development Centers and Sensitivity Centersmentioning

confidence: 96%

Reduction of Silver Halides and the Mechanism of Photographic Development.

James¹,

Kornfeld²

1942

Chem. Rev.

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Section: B Development Centers and Sensitivity Centersmentioning

confidence: 96%

Reduction of Silver Halides and the Mechanism of Photographic Development.

James¹,

Kornfeld²

1942

Chem. Rev.

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“…One of the most sensitive, though unfortunately not a specific test for volatile peroxides, is the formation of latent images when they act on photographic plates (13). The action of hydrogen peroxide on a plate is similar in every respect to that of light (21). It is reported that the test is so sensitive that it can detect the peroxides formed when certain metals (zinc, aluminum, cadmium) are exposed to light in moist air, but no effect is produced when they are exposed to light in dry air (5, IS, 19).…”

Section: Previous Workmentioning

confidence: 99%

Mastication of Rubber An Oxidation Process

Busse¹

1932

Ind. Eng. Chem.

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possible with the various solvents now available, but it is probable that few, if any, are true constant-evaporating mixtures. The behavior of a mixture of benzene, butyl acetate, and amyl alcohol has been referred to by Hofmann and Reíd (9). The ingredients are removed from the mixture by evaporation, more or less completely, in the order named, although of course all are evaporating simultaneously at different rates. Summary 1. Evaporation rates of organic liquids are not proportional to their boiling points.2. Determinations of rates of evaporation by the usual method are sufficiently indicative for practical purposes, but the results are not capable of numerical expression.3. For pure liquids the slopes of the evaporation curves may be used to express the rate of evaporation. 4. A simple method of determining rates of evaporation of pure liquids is described. In this method temperature, humidity, and air velocity are controlled, and the apparatus is preferably calibrated with a standard liquid. (Normal butyl acetate was used.) 5. The rate of evaporation of a liquid may be approximately predicted by means of the formula: vapor pressure X mol. wt. -s-11 which gives a rate of 100 for n-butyl acetate (20°C.).6. The compositions of several new binary constantevaporating mixtures and of two ternary mixtures which may be called "apparent constant-evaporating mixtures," have been determined. Literature Cited (1)

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“…This might be the result of differences in solution pressure only, but Toy (17) has shown that the number of development centers per developable grain increases with increasing exposure, so that the centers may be assumed to represent the actual distribu- tion of the latent image. They can hardly be attributed to the structure of radiation, since they are distributed preferentially along the edges and comers of flat grains, and since the action of light in inducing developability may be almost perfectly reproduced by sodium arsenite (18) or hydrogen peroxide (19) solutions. As their importance lies in producing developability, it is obvious that nuclei must lie on the surface of the grains to be effective.…”

Section: Present Theories Of Sensitivitymentioning

confidence: 99%