Thank you for your help! I have tons of citric acid and a few bags of Kodak HCA. These two chemicals alone must do the job for I have no chance to buy other products until new year and I have to print before that. Any hint on how to mix them i.e. without EDTA? However you guys recommend not to try further with citric acid alone (more concentrate, more time etc.), right?

I am so disappointed right now, I have been using citric acid for years with Cranes, Socorro and even Gampi without any problem. Now that my favorite Cranes Crest (the equivalent of Cranes Platinotype in Europe) is no more available I find myself with deadlines and no way to make a decent print.