I disposed of the short international cartridge, used a bulb syringe to flush, dipped the nib in water, and then used a paper towel to pull the remaining water from the feed. I then got a cartridge converter for it and filled it with Birmingham Pen Co ink and now I have the weird blotchy/feathery lines .
You can see the nice blue sharpness compared to the blotch/feathery in the Birmingham . At first I though it was simply the characteristics of the ink so I flushed it again, and replaced it with a CdA short international cartridge, but I get the exact same blotchy/feathery characteristics like make it look like it might be the nib. It almost looks like a ballpoint that's skipping badly.
Does anyone have any ideas??? Is the ink too diluted from flushing the pen or has the nib been damaged somehow?
Greatly appreciate the help because the original idyllic blue is so sharp, smooth and prominent. I have no clue what's happened.