USAGE – Before using, tighten cap and shake the bottle vigorously for at least one minute until the mixing ball moves freely. Shake thoroughly until fully blended before each use. After use, close tightly and wipe the pouring tip with a clean cloth, preferably with a sterile wipe. STORAGE – Each bottle of ink is marked with a best before date and most have a spot to write, “open date”, on the label. As per regulations; ink must be used within 12 months of opening. Most inks have a 24 month date for unopened shelf life, Black pigment often has a 36 month unopened shelf life. In general, stored bottles should be shaken every few weeks to ensure a consistent colour match during active use. Ink should be stored away from the sun, kept below 35 degrees and above 10 degrees. Always wear gloves when handling the bottles. Do not freeze.