Fixing After development, the light sensitivity of the plate was arrested by removing the unexposed silver halide with a mild solution of sodium thiosulfate; Daguerre's initial method was to use a hot saturated solution of common salt.
fixing after development the light sensitivity of the plate was arrested by removing the unexposed silver halide with a mild solution of sodium thiosulfate; daguerre's initial method was to use a hot saturated solution of common salt