A rollerball pen or simply roller is a type of pen using a gelled or water-based ink, unlike a conventional ballpoint pen that uses a viscous and oily ink. The lower viscosity of these inks allows a better saturation of the paper, which gives the roller its qualities of writing. The rollerball pen was originally designed to combine the ease of use of the ballpoint pen with the softness and writing quality of the fountain pen. The pressure to be applied to the roller to obtain a suitable writing is less than with a ballpoint pen, which makes it possible to hold the roller less firmly and thus to increase the writing comfort over time. Roller pen have a wider choice of colors due to the wide variety of dyes and pigments available. These pen slide on the paper more homogeneously than ballpoint pens and leave fewer blanks. Conversely, the risk of intermittent interruption of ink flow is slightly greater with gelled ink rollers. To let you buy these roller pen, eWorldTrade features roller pen manufacturers and suppliers that are providing high-quality roller pens in different colors and designs. Browse our list of roller pen providers and visit their product page to know more.