Hello guys, today ive found a pen inside my dads drawer. Its a parker 21. I had no available converter for this pen so I just washed the old cartridge and filled it with Pelikan royal blue ink. It started to vomit as i used it. It still keeps on vomiting even the times when i dont use it. Can you help me how to fix it? Is it a common problem among parker21s? As you can see theres ink on cartridge and even if you cant see ink spills from nib part too.