Varn's Total Chrome Free is A Heavily Buffered, Environmentally Friendly Gum/Acid Formulation. It's Heavily buffered and designed to run in the 0 ppm through 300 ppm of hardness range - perhaps the most flexible water range in the graphic arts industry. Low VOC and contains no chrome. It stimulates ink drying and aids in reduction of alcohol. Primarily used on metal plates, Total Chrome Free is designed to run on conventional, bareback and alcohol systems.