All inks are produced in the most advanced dust-free workshop. With tertiary filtration at 0.01 micron, the impurities and particles can be filtered out in the inks so as to avoid jamming the nozzle, and the products can be 100% compatible with OEM ink. The products own brilliant and saturated colors. Our products are more economical and can save the half of the expenditure of the OEM ink. Good for environment and no harm to the human health.