Another pinner says: Uni-Ball Signo White Gel Ink pen "The Best White Artist Pen Ever Made! I use white gel pens on watercolor paintings.
'How to add white pen highlights to your coloring pages.' (via Sarah Renae Clark - Coloring Book Artist and Designer)
Silky opaque white gel pen that writes beautifully on darker colored papers. Please allow at least one minute for ink to dry before handling. - mm tip size - Capped pen with rubber grip - Manufact
White gel pen shoot out
Recollections from michaels. If you& looking for the best white pens for black paper, I tested 5 of the leading pen brands and share the results here.