Dwayne's does B&W processing. I called them and asked them what developer do they use for their B&W developing. They said that they use Trepan RT. Having never heard of it and never used it I looked it up and called the company. I was told that Trepan RT was modeled after Kodak DuraFlow RT developer. Has anyone have any expierence with Trepan RT or Duraflo RT? I use Ilford HP5 and was wondering what kind of results I could expect. Has anyone used Dwayne's for B&W processing? How did you like it? Dwane's runs Ilford HP-5 in Trepan RT for 110 seconds at 24.5 C. They have use Trepan RT for 20 years and say that they haven't had any problems with it. Thanks!