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Fotospeed Variable Odorless Sepia Toner is a three part toner that allows maximum control of color from yellow-brown through sepia to dark brown.
Parts 1 & 2 the bleach and toner baths are used separately. Part three is an additive mixed into part 2 to control the color of the final print. Chart included for dilution rates to achieve various colorations.
Fotospeed toners have been specifically designed for the toning of black and white silver based emulsions.
The toning process involves the conversion of the black silver within the print to another metallic compound. When correctly toned, the image will be chemically stable.
Toners such as Selenium and Gold are ideal for archival permanence techniques.
Toning techniques are carried out after the print has been fully fixed and washed and are therefore performed under normal daylight conditions.
Toning is very much in the creative domain of the user. When toning it is important to observe the shift of color in the print.