refill ink cartridges

Excellent for the price and quality, but it must be equipped with at least one syringe, acetone or other alcohol to the / clean.
To take the syringe in a pharmacy 5ml with diam.1,2 or 1.3mm needle to inject a small vent hole in the Upper part (note: sometimes hidden by colored adhesive). .All the cartridges must have a venting (such as car tanks, for example by the cap);