| 摘要 |
Process for treatment of a photographic support comprising an image whitened after exposure, development and fixing in order to render said whitened image capable of being developed in daylight or in any other non-inactinic light, characterized by the fact that the photographic support comprising the whitened image is subjected, during a sufficient length of time, to the stabilising action of an acid bath containing an effective quantity of thiourea or equivalent blocking agent.
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