Some gel pen sets use thermo-sensitive erasable gel ink that can be erased by friction. This ink can become colorless at high temperatures (noted as above 140°F) and may regain color if cooled (noted as low as 14°F). Because of its heat sensitivity and erasable nature, this ink is not recommended for legal or official documents.
Gel pen sets range from black-only options to multicolored assortments. Common colors listed include pink, purple, green, blue, orange, red and black.
Yes. Some gel pen sets advertise quick-drying or smear-resistant ink—one claims ink that "dries in as little as five seconds" and highlights this as beneficial for left-handed writers, while another states its ink "dries 3 times faster" to reduce smearing.
Reviewers commonly report smooth writing, good ink flow, quick-drying or minimal smearing, vibrant colors, and effective erasability. Some reviewers note downsides such as lighter-than-rollerball ink, slower drying for certain colors, heat sensitivity in erasable inks, or occasional inconsistent flow.
Yes. One set notes a pen barrel made from renewable and reclaimed material and states its packaging is printed on FSC-certified paper using soy-based ink.