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Look online or in your local craft store for these items. Copic’s Various Ink can be used to refill any kind of Copic marker. The Copic refill booster is a special tool with a needle that makes it easy to refill your markers. To ensure the ink doesn’t stain you or your furniture, take measures to protect yourself and your workspace. Put on gloves and stack newspaper or plastic sheeting over your work area. Wear short sleeves or roll up your sleeves to keep them out of the way. Grip the nib on the wider side of the marker with metal tweezers. Firmly pull it straight out of the marker. Remove the cap from the Various Ink refill, then take the booster out of the package and screw it securely onto the Various Ink refill container. Insert the needle of the refill booster into the opening that was created when you removed the nib. You don’t have to stick it all the way in the marker—just make sure the end of the needle is inside the opening of the marker. Hold the booster with the ink attached vertically over the top of the marker. Each marking on the side of the Various Ink bottle indicates 1 cc each. Gently squeeze the refill ink container to add 1.5 to 2 cc of ink to the marker. Take the booster out of the opening in the marker and set it aside. Pick up the nib with the tweezers and push it back into the open end of the marker. Unscrew the refill ink from the booster and replace the cap on the ink. Cap the marker as well. Pour a few drops of standard rubbing alcohol or Various Ink cleaning solution down the opening of the booster needle (where you screwed the ink bottle on). Then, swirl a cotton swab around the inside of the booster to remove any remaining ink.

Summary:
Acquire a Copic refill booster and refill ink. Put on gloves and cover your workspace. Remove the nib with tweezers and screw the booster onto the ink. Insert the needle into the open end of the marker. Add 1.5 to 2 cc of ink to the marker. Remove the booster and replace the nib. Remove the ink from the booster. Clean the booster needle.