This Instructable shows how to refill rollerball pens. Or since we know how to save 200$ by hacking MONT BLANC Refills to fit in Pilot G2 we all want to save even more by refilling the refills :)
What we'll need:
Pot with Water ,Cooker
Inkpot (I used Pelikan 4001 black. It is for fountain pens. But any ink will do)
Step 1: Boil it!
We have to put the Refill in a pot, add some water an boil it.
Step 2: Let it suck !
After all the air leaked from the refill - this will take about 2min boiling - take tweezers and pick the refill at the end and put it into the inkpot (or pot with ink in it). Wait until chilled to room tempertaure. Ready.
Step 3: Generalizations & Extensions
Now we know the principle: Make it hot so that air expands, make it cool so that air contracts and sucks ink into the refill.
What if our rollerball pen has no refill - Yes it's its own refill. Take the whole pen. Remove all removable parts and do the same procedure. I testet this with the uni-ball. It got a bit banana-shaped but its still fine.