Emulsió fotogràfica

Part del material fotogràfic que conté les partícules de plata que reaccionen amb la llum i donen origen a les imatges. Les partícules de plata acostumen a estar suspeses en un aglutinant que les conté i que s’adhereix a un suport, ja sigui de paper, plàstic o vidre, per exemple. Des de finals del segle XIX s’utilitza majoritàriament la gelatina com aglutinant, però anteriorment altres tècniques utilitzaven el col·lodió (una barreja de nitrat de cel·lulosa, alcohol i èter) o l’albúmina (elaborada a base de clares d’ou).

Foto: AGDB

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