Panda Wiggle Gel PenPANDA WIGGLE GEL PEN Smooth fine tip black gel ink. BCmini gel pen uses a gel based ink, combining the permanence of oil based ballpoint ink and the smooth glide of water based ink, in which pigment is suspended in a water based gel. Gel ink is thick and opaque, it shows up more clearly on dark or slick surfaces than the typical inks used in ballpoint or felt tip pens. Gel pens can be used for varies types of writing and illustration. Fine tip gel