Archives des alphonse poitevin - Technique Phototypie

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Archives des alphonse poitevin - Technique Phototypie

Invention du procédé

12 janvier 2018 michel.momal 0

La sensibilité à la lumière des bichromates : En 1797, le chimiste Vauquelin, qui venait de découvrir le chrome en étudiait les diverses combinaisons, constata […]