I agree with Doug and Peter. The 130 produces blacks that are, in the words of another, "stygian". Have a look at Michael and Paula's site. There is a long article on using various developers with Azo paper. 130 is close to Amidol, but the difference-as has been pointed out-is the ability to use a water bath with amidol, and thus to be able to control the contrast. Might be interesting to see what Ultrablack developer does with Lodima as well.