Hello, Clay. I have printed a step wedge with your calibration file and the Dmax is 1.60 i can't get more than that. I suspect that my film can't handle more ink. Or maybe your file was at 50% curve. I'm using a film (140 miicrons) from a dealer here in Spain. It's not Fixxons or Pictorico. But never had any problems with Cyanotype or Gum.
Has anyone tested it with Fomei film ?
Thank you in advance