The Uni-ball Signo Broad is our best-selling white gel pen. Artists and crafters all love its highly opaque and viscous ink. Though the pen tip may occasionally clog due to this thick ink, scribbling on a damp towel or piece of scratch paper will get the ink flowing again quickly. Long periods of unuse can cause the pen to dry out, so it's best for those who use white ink often or who are working on a large project. Like other Signo pens, it is archival safe and water-resistant.