Japanese Red Sumi Ink
Red Sumi is traditionally used for printing your hanko, or seal, cut into the block. The closest Pantone color is 1655C (pantone.com) but keep in mind that your monitor may not show a true color.
After use, be sure to wash out your brushes immediately to avoid clogging and permanent damage. The Art & Craft Materials Institute and ASTM (American Society of Testing and Materials) certify that this ink is non-toxic.