A single part concentrate which is specifically designed for toning of FB + RC B&W papers to produce a wide range of subtle warm purple black tones. Tonal shade is adjusted by dilution and toning time. RC papers may be slow to react with selenium. Chlorobromide emulsions (such as Fotospeed RCVC papers) are the exception and will produce very effective results. Archival Permanence Techniques for all papers are achieved with higher dilutions. Full instructions supplied

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