enrico__

So I get the chemicals to make up some two-bath. My Bath A is Metol (6g) and Sodium Sulphite(80g). I mix up the Metol first in 100mls of water. I then mix the Sodium Sulphite in about 300mls of water, and add to the Metol. I add enough water to make 1 Litre. Everything looks good until about 2 hrs later when I notice that the mix has virtually turned very dark brown. It is now black! Why? I hadnt processed any film with it. At what temperature should the water be at when mixing the above mentioned chemistry? Thats teh only thing I can think of affecting it. (maybe too warm?). I was using fresh de-mineralised water. Thanks ~enrico