Does anyone have any experience with or advice on diluting polysulfide toner homebrew using the Kodak T8 formula: 7.5 g potassium sulfide + 2.5 g sodium carbonate in 1000 ml of water? According to Photographers Formulary and others, this is intended to be a working solution. Polysulfide toners are known for their effectiveness at higher dilutions, so I'm wondering if any APUGers have worked with this formula, diluted it, and with what results.
By comparison, Wynn White starts with a 30% stock solution of potassium polysulfide. His formula uses only 25 ml of the 30% stock solution + 2.4 g sodium carbonate in 1000 ml of water. That's a 0.75% polysulfide working solution (25/1000 * 0.3)! His working solution is heavy on the sodium carbonate. In theory one could dilute the Kodak T8 formula 1+9 to achieve a 0.75% polysulfide working solution albeit with a much weaker carbonate portion.
By comparison, Wynn White starts with a 30% stock solution of potassium polysulfide. His formula uses only 25 ml of the 30% stock solution + 2.4 g sodium carbonate in 1000 ml of water. That's a 0.75% polysulfide working solution (25/1000 * 0.3)! His working solution is heavy on the sodium carbonate. In theory one could dilute the Kodak T8 formula 1+9 to achieve a 0.75% polysulfide working solution albeit with a much weaker carbonate portion.
