Pigment-based ink formula produces crisp, dark text and bright colors on plain paper. High-density ink provides highlighter- and smudge-resistant printing. Helps Avoid Waste - Designed for extended use, helping reduce or eliminate material use and potentially save money. Recycling solution - designed to encourage recycling, helping you divert materials from landfill. Helps Avoid Waste - Designed for extended use, helping reduce or eliminate material use and potentially save money.