This I am led to believe is occasioned by the action of light on the yet sensitive portions of the plate, and made to appear only by subsequent exposure to mercury, being equivalent to solarization.
"American Handbook of the Daguerrotype"
Samuel D. Humphrey
If the solarization be very deep, apply the lamp beneath, and warm the plate a trifle.
"American Handbook of the Daguerrotype"
Samuel D. Humphrey
Expose an impressioned plate, that has been sufficient time in the camera to become solarized, to the vapors of bromine, and the impression will be fully developed and exhibit no signs of solarization.
"American Handbook of the Daguerrotype"
Samuel D. Humphrey