Spy Invisible Writing Ink Pen

Listing ID #3409213

Those Cunning Chemists In Action'S Ink Labs Have Come Up With A New Twist On The Perennial Search For An Effective Erasable Pen. The Ink Laid Down By The Fixing Roller Ball Disappears Under Friction! The End Of The Pen Has A Hard Plastic Eraser, Which When Rubbed Over The Writing Causes The Color To Disappear From The Ink. You Can Then Write Over It Again With The Same Pen.