Permanent markers are writing instruments that contain ink designed to be long-lasting and resistant to fading. They typically have a felt tip and can write on various surfaces, including paper, plastic, metal, and wood. The ink is usually made from dyes and solvents, which help it adhere to surfaces and dry quickly. These markers are commonly used for labeling, crafting, and art projects. Due to their strong ink, they are not easily removed, making them ideal for tasks that require durability. However, caution is advised, as the ink can stain skin and clothing, and proper ventilation is recommended when using them.