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Take out the empty ink cartridges from the canon pixma mp240 printer , wearing disposable gloves to avoid your hands from spoiling and then refill these ink cartridges with original canon ink compatible with it. Jhonson Perry

In order to reset canon pixma mp240 series ink cartridges after refilling them for a canon pixma mp240 series printer, buy the compatible refilling kit and follow the instructions mentioned there. Bill Perry

Replacing the cartridges in the Canon Pixma MP 250 printer is easy. You need the following ink cartridges: pg-512, pg-510, pg-511 and pg-513 (one for black, cyan, magenta and yellow). When opening the top cover, you will be able to remove the existing cartridges and replace them with new ones. Follow the instructions to remove the protective tape before. Ben Norrington