Your guidance is appreciated in advance as I need some help in achieving full-quality prints with the P2-K6 system. Here's the situation.
— This is my first experience with the piezography system.
— Epson 3800
— I followed the directions from the New Piezography Manual with religious devotion.
— The head-cleaning stepped-lines print is perfect.
— The inks appear to all be in the correct locations
— The transparency film is Inkpress Transparency Film. I realize this is not the officially supported film but this issue is only appearing with the tones that are 45% and darker so I'm not sure the film is the problem. Or that it is okay. That's a variable. Regardless, I have ordered Pictorico and it will arrive on Friday.
Here's the problem. Starting with the 45% tones and moving towards black the supplied 21-step chart exhibits a blotchy pattern. The pattern becomes more and more defined as the gradient becomes darker. The blotchiness may be present in the lighter tones and simply not visible because they are so light.
My goal with this project is to make negatives that I can use in my 4x5 enlarger to print on wet-plate tintypes. I'd love to hear from anyone who may have done this process and has achieved success with these inks. The OEM inks worked well on the Inkpress Film stock but (of course) exhibited a dithering pattern that was quite distinct on the very sharp and unforgiving tintype medium.