Copic Ink Refill – Sardonyx R21
Copic R21 Sardonyx is named after the Sardonyx gem. This red is similar to R20 but with a darker vermilion.
Size: 12 ml
COPIC ink is an alcohol-based substance that does not dissolve and works well with watercolors and colored pencils. COPIC original, Sketch, Ciao and Wide markers are refillable by using this fast-drying, permanent and non-toxic alcohol ink. To refill Copic markers, match the color number on the marker with the corresponding ink color number. Markers can be refilled by dabbing the ink directly onto the broad nib using the attached nozzle. This 12 ml ink should be able to refill all markers approximately 5 to 8 times, depending on marker type.