Production year
1926
© Fonds historique / CNRS Images
19000001_0644
Machine à morsure chimique de messieurs Louis et Paul Breton pour la photogravure, photographiée en décembre 1926. Office national des recherches scientifiques et industrielles et des inventions. Elle permet la gravure rapide de plaques de similigravure et de trait. Sa vitesse d'exécution permit de faire passer d'une heure à 10 minutes la morsure chimique d'une plaque.
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1926
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