It usually refers to a narrow elongated staff, similar to a modern ballpoint pen. Ballograf was the leading brand of ballpoint pen in the Nordic countries. Color availability and sensitivity of ink to light are among concerns of ballpoint pen artists. Zoom was born as a ballpoint pen and mechanical pencil brand in 1986. In 1955 the company bought the ballpoint pen manufacturer Paper Mate. Ballpoint pen artwork is sometimes associated with Folk art. Following World War II, many companies vied to commercially produce their own ballpoint pen design. Ballpoint pen artist Lennie Mace was also among the regular contributing illustrators. Prominent exhibitions specifically showcasing ballpoint pen artwork occur intermittently. The consignment should only be completed with a ballpoint pen, typewriter or computer. Ballpoint pen artwork has gained increasing interest in the 21st century. Ballpoint pen sales peaked in 1946, and consumer interest subsequently plunged due to market saturation. Fountain pens may serve as an everyday writing instrument, much like the common ballpoint pen. The pico is a pocket telescoping ballpoint pen designed by Franco Clivio. The Parker Jotter is the Parker Pen Company's second and best-selling retracting refillable ballpoint pen.