The Applied Research Center of New York College of Health Professions has been awarded US Patent No. 9,750,325 for Colorball, its disposable tube which makes mixing hair colorant and the developer, normally a messy job, a simple one-step process.   When the button is depressed, it allows the inner tubes to flow onto the rollerball mixing the dye and developer. Colorball can be the size of a pen for accurate placement of highlights or streaking, or wider with a larger rollerball for instant ...