Ann it looks as though I followed your directions. However I don't know what a step wedge is. My enlarger is a C760 B&W diffusion model. I tried the blank negative this is the one that gave me the 8 second black at f11. I didn't make any prints because I didn't see the point of making solid black prints. I just figured I need to get past this point first. I suppose I could try an exposed negative tonight.