Artline Calligraphy Pens are known for their quality and precision in creating beautiful calligraphy. These pens are designed with special features to enhance the calligraphy experience: Water and Smudge Resistant: This feature ensures that your writing remains intact and doesn't smudge or blur when in contact with water or moisture, allowing for clean and crisp lines. Fadeproof: Being fadeproof means that the ink used in the pen is resistant to fading over time, preserving the vibrancy of your artwork for longer periods. Acid-Free: Pens that are acid-free are ideal for archival purposes as they prevent yellowing and deterioration of the paper over time, making them suitable for long-lasting artwork. Flat Style: The flat style design of the pen can provide a comfortable grip and control while creating intricate calligraphy designs. These features combined make Artline Calligraphy Pens a popular choice among artists and calligraphers looking for reliable tools to create stunning and long-lasting artwork.