Sandy King has done his research and formulated an excellent developer. Also, he has a new web site that is outstanding. I was pleased to find that he has a section dedicated to his technical writings which contains his original article on Pyro Developers. If you are seriously thinking about working with Pyro Developers, I would highly recommend you take a look at the article, “AN INTRODUCTION TO PYRO STAINING DEVELOPERS, WITH SPECIAL ATTENTION TO THE PYROCAT-HD FORMULA” by Sandy King.
There is no need for me to go into the details of my experiments with Pyro Developers since I have covered what I learned in my previous BLOG post. I would also recommend the above mentioned article by Sandy King, which covers a lot of what you need to know about Staining Developers. All I can add is that PyroCat-HD is the only developer we now use. Maybe you should try it yourself?
JB