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Etching is an indirect technique to etch the metal plates ( zinc, iron, copper, brass ). The bites on the metal plate are made by nitric acid agent(once called aqua fortis)biting in, or by other acids.
Movie lenght in minutes: [5:23]
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Written and directed by Alberto Nacci
Technical-artistic consulting by Mario Benedetti
intervews to Carlo Bertelli, Alberto Veca, Mario Benedetti, Giorgio Upiglio
Music by Alberto Nacci and Alessandro Fabiani
Produced by Alberto Nacci / AJP Studio
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