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ID-78 Ilford Warm Tone Developer
| Phenidone | 0.5 g | |
| Sodium Sulphite (anh) | 50 g | |
| Hydroquinone | 12 g | |
| Sodium Carbonate (anh) | 62 g | |
| Potassium Bromide | 4.5 g | |
| Water to | 1 litre |
To use: Dilute 1+ 3 for warmest tones. Can be used at 1+1 for higher contrast.
This formula is invariably published incorrectly in US sources and many websites with only 0.4g Potassium Bromide.
ID-78 can be made up as a more concentrated stock solution and keeps well with an excellent shelf life.
Concentrated Stock Solution ID-78
| Phenidone | 1.25 g | 6.25 g | |
| Sodium Sulphite (anh) | 125 g | 625 g | |
| Hydroquinone | 30 g | 150 g | |
| Potassium Carbonate (anhyd) | 96.25 g | 480.12 g | The Sodium Carbonate is best replaced by Potassium Carbonate |
| Sodium Hydroxide | 5.3 g | 26.5 g | and Sodium Hyrdoxide in the Concentrate which increases solubility. |
| Potassium Bromide | 11.25 g | 56.25 g | |
| Water to | 1 litre | 5 litres |
To use: Dilute 1+9, use 1+4 for higher contrast
ID-78 gives
excellent Warm Tones with a wide variety of modern warm tone paper, including
Polywarmtone, Agfa/Adox MCC, Fomabrom 111 and of course Ilford Warmtone
FB. It was once commercially available in as aPowdered developer to make
1 gallon and 10 litres (2¼ Gallon) of Stock solution. It's a direct
replacement for Neutol WA and Ilford Warmtone developers and was once available commercially as an Ilford pre-packed powder developer.
Example: Fomatone MG Classic 131 / ID-78 / Selenium toned: Rhodos Castle, Nov 2009
