Which statement regarding permanent ink is incorrect?

The statement indicating that permanent inks are waterproof is incorrect, as it implies complete resistance to water under any conditions. While permanent inks are generally water-resistant, meaning they can withstand some exposure to moisture without running or smudging, they are not entirely waterproof. This distinction is important because permanent inks can still be affected by heavy water exposure and certain solvents, which can lead to fading or running.

The other statements accurately reflect the qualities of permanent inks. They are indeed water-resistant, lending them durability in many practical applications. Additionally, they are designed to provide long-lasting results, making them suitable for artworks, calligraphy, and other projects that require permanence. Finally, the availability of permanent inks in various colors allows for creative flexibility, catering to different artistic preferences and needs.