FORMULARY THIOUREA TONER will give beautiful rich brown sepia-like tones.
The print is first bleached using a ferricyanide-bromide bath then redeveloped in a sulfide bath. In this process, the silver metal in the print is first converted to silver bromide, then to brown silver sulfide.
The end result will give the impression of a print made in the late 1800's.
Reviewed by 1 customers
Two part toner and bleach. Bleach has long self life.