The solarized portions also are very seldom blue, especially after gilding.

If heated too high, however, the light parts become of a dead, chalky white, and the shadows are injured by numerous little globules of mercury deposited over them.
Just the right quantity of mercury leaves the impression of a transparent, pearly white tone, which improves in the highest degree in gilding.

To mercurialize with exactness is a nice point.

If there is reason to suspect having timed rather short in the camera, reduce the time over mercury in a corresponding proportion.

A dark impression will be ruined by the quantity of mercury which would only improve a light one.
If practicable, it is most expedient that the plate be submitted to the action of mercury immediately on coming from the camera.