Descrizione

Ordinary dry plates, which owe their sensitivity to the silver halides alone, are sensitive only to the violet and blue regions of. The spectrum. If, however, a suitable dyestuff be added, the emulsion becomes sensitive to other regions, the particular region depending on the dye used. Thus erythrosin sensitizes to the green and greenish yellow, pinaverdol to the green and yellow, pinacyanol to the orange and red and dicyanin to the extreme red and infra-red.