I have been reading several sources on enhancing highlights through chemical reduction (bleaching) and I have encountered some surprisingly diverse techniques. In particular the methods of Ralph Steiner & Barry Thornton. Although both of their chemical formulas are based upon potassium ferricyanide that is where the similarity in chemical formulas (Steiner even uses cane sugar as means of inhibiting the reaction) and process ( Thornton uses bleaching with redevelopment) ends. Steiner also suggests the strong bleaching formula reacts with various intensity within different density areas of the print vs the more dilute formulas, a plus for highlights! Thornton's drag bleaching has some wonderful adjacentcy effects. This has made me curious as to what other methods or formulas that other B&W printers may be using within this context. Your own experiences or direction to other resources is appreciated. Regards... Annie.