Japanese Company Creates the World’s Blackest Gel Pen
Japan’s Mitsubishi Uni-ball ONE series black gel pen has been recognized as the world’s blackest gel pen by Guinness World Records. When it comes to the world’s blackest paint, there is no competing with Vanta Black, but pen gel is a whole other matter. Mitsubishi Pencil Co.Ltd. now holds the record for the blackest gel […]