Make a $5.00 "Space Pen" for your wallet

Step 3 Shrinking the tubing using a small pocket heatgun

I used a small pocket heat-gun to shrink the tubing. A butane lighter can also be used. When using either, be sure to keep the flame moving across the surface, never stopping at any given point. This ensures that the tubing won't burn and that the ink cartridge does not get too hot.

Comments

[Rishnai]

I betcha accdentally blowing up one of this would make an incredible mess.

[stinch]

The gas pressure is pretty low and the ink is pretty thick. Not really any worse for mess than when a normal biro leaks.

[Odbe]

That sounds like a plan.

[mmolo99]

One of my friends did that once and ink got everywhere. It was Hilarius. On the other hand, this is a cool idea.