[Gerald C Koch]

The individual components keep for years if well stored. Mine are a few years old for the most part and function fine.

D-76 is pretty easy to mix up, having relatively few ingredients.

Bear in mind you can also play with other interesting developers once you start to do this. D-22 comes to mind, which is simply metol and sodium sulfite.

I see that your keyboard has the same problem that mine has -- it is a lousy speller. Of course you mean D-23

Metol 7.5 g
Sodiun sulfite, anhydrous 100.0 g
Water to make 1.0 l

There is also D-76H which is a variant of D-76 without the hydroquinone developed by Grant Haist. This formula should not be confused with D-76h. There is a whole family of variants of D-76.