Phosphorescent marker for laboratory autography

摘要

A laboratory autography marking pen capable of delivering a low viscosity phosphorescent marking ink that contains a homogeneous suspension of phosphor particles having an average particle size of between 10 and 40 microns, and whose afterglow half-life is less than 5 minutes. The marking pen further includes a high porosity fiber channel writing nib whose ink flow channels are of a sufficient size to allow the phosphor particles suspended in the ink to flow by capillary transport through these channels onto an ink receiving substrate material.