D76 vs TMax RS processing

[StoneNYC]

In the "official" recipe for D76 the hydroquinone <SP?> isn't active and only the metol actually does the development. This is a result of the PH being to low. However after D76 is mixed the hydroquinone <SP?> reacts with the Sodium Sulphite and causes an increase in PH which is enough to make the hydroquinone active causing an increase in development. Unless you plan on using the D76 in a replenishment line it's best to simply eliminate the hydroquinone and increase the metol to 2.5gm per liter of stock.

It won't help with the drop off in activity over time resulting in oxidation but I mix it one liter at a time so that's never an issue for me.

So times listed, are they for newly mixed or "active" week old mix?

[Frank Pittel]

So times listed, are they for newly mixed or "active" week old mix?

I would use the listed times for the "newly mixed".

Truth be told when using a new film/developer combination I do testing to determine the film speed to use and development time. I also like to use freshly mixed d76h. It's fast and easy to do and by using distilled water to mix it I don't have to heat the water to 120F prior to mixing. Meaning I can mix up a liter or even half liter just prior to use.