The development times at 68 Degree F (20 Degree C) for Ilford Delta 100 35mm film are as follows: 7 minutes with the stock solution, 10 minutes when diluted 1+1, and 15.5 minutes when diluted 1+3. For Ilford Delta 400 35mm film at 400 exposure, the development times are 7 minutes for the stock solution, 10.5 minutes for the 1+1 dilution, and 18 minutes for the 1+3 dilution. A single liter of the working strength stock solution can process up to 10 rolls of 35mm or 120 film, while the 1+1 dilution can handle up to 5 rolls of the same formats.
For optimal results, it is important to note the storage guidelines: an unopened full bottle of ID-11 stock solution can be stored for up to 6 months, whereas a half-full bottle has a storage life of 1 month. Once diluted, the solution should be used immediately as a "one-shot" developer and is not suitable for storage. This makes the Ilford ID-11 Film 5L Developer Powder a reliable and versatile choice for photographers seeking high-quality black and white film development.


