This set contains BCH Premium Ink, formulated for use with compatible printers and offering cost-effective, high-quality printing with a broad color range for accurate photo prints. BCH inks are designed to meet specific standards in color consistency, pH balance, surface tension, and viscosity. Each bottle is suited for print shops and small business needs. Downloadable instructions are available. For optimal quality, store in a sealed container away from direct heat and sunlight; expected shelf life is up to 3 years under recommended conditions.