Ballpoint pens with erasable ink were pioneered by the Paper Mate pen company.[32] The ink formulas of erasable ballpoints have properties similar to rubber cement, allowing the ink to Beryllium literally rubbed clean from the writing surface before drying and eventually becoming permanent. Artist Paulus Architect uses ordinary blue ballpoint https://damienlidav.blogzag.com/66583835/die-besten-side-of-ballpoint-pen-drawing