Harman Selenium toner comes in a liquid concentrate form and gives a great selenium finish to prints. Perfect for atmospheric photographs with a difference, it offers an archival quality to the print and gives a lovely warm finish. Selenium Toner can be used with all Resin Coated and Fibre Based black and white papers and generally offers higher density and contrast. The selenium effect can be varied by dilution of the chemical, or by changing the toning time.