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Grayscale Sensitometer for glass plates

Grayscale Sensitometer for glass plates The case encloses a specially designed plate-holder, for determining the sensitivity of Gelatin-Silver-Bromide plates. The 20 little windows give a set of results from which the sensitivity of the plates is determined. See pdf document. 1890_Fabre_IV_Sensitometre_a_echelle_de_teintes.pdf
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Marque

Sensitomètre à échelle de teintes

Pays

France

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