I will swap the cartridges over each time one runs down, so storage would be about 12 weeks at the most. I will still store them air tight s you suggest, thanks.
Hello, I removed the plastic seal ball from my empty canon PGI-520 / CLI-521 cartridges and after filling them I used a self tapping flange screw in place of the ball to seal. The flange of the screw must be shallow enough not to foul ( don't use panhead screws, they are not shallow enough ) the...