The liquid ink roller pen is mainly made of water. Under the action of the writing fluid, the writing fluid passes through the gap between the steel ball and the tip of the pen to form the handwriting...
The viscosity of the writing medium is between water and oil, therefore, RT GEL PEN is more smooth than ordinary oil-based ballpoint PEN, which is an upgrade of oil-based ballpoint PEN products.
The utility model relates to a liquid ink roller pen, which is composed of a pen cap, a pen head body, an ink storage device, and a pen rod, the rear end of the liquid ink roller pen steelhead is inse...
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