i-Prep Pre-Treatment Solution is a must for digital textile printing on colored and black substrates. When properly applied and cured prior to printing, i-Prep™ provides the base necessary for vibrant colors and precise results. i-Prep™ should be cured with heat and pressure in a heat press. Doing so causes the garment's fibers to lie flat so they can't interfere with the application of ink, and it prevents ink from soaking into the fibers. i-Prep Pre-Treatment Solution is available in one-liter bottles.