Pentel Arts Gel Roller for Fabric, 1.0mm Bold Lines, Permanent, Black Ink, Pack of 2. Non-smudge, no-smear ink is permanent on most fabrics. Bold 1.0 mm tip produces smooth lines. Water-based gel pigment ink withstands repeated washings, even dry cleaning. Create quilt labels; label clothing for school, camp and daycare; autograph sports apparel and class T-shirts; decorate hats, shoes and other accessories. Place blotting paper or cardboard behind fabric to absorb bleed-through ink. For use on fabric only.