Ink pens are writing instruments that use liquid ink to create marks on paper. They come in various types, including ballpoint, fountain, and gel pens. Each type has a different mechanism for delivering ink, which affects the writing experience and the quality of the lines produced. Ink pens are commonly used for everyday writing tasks, such as note-taking and signing documents. The ink in these pens can be made from various dyes and pigments, allowing for a wide range of colors. Many people prefer ink pens for their smooth writing and ability to produce fine details. They are often used in art and calligraphy, where precision is essential.