In calligraphy, which tool is typically used to create Celtic letter styles?

The use of a calligraphy nib is essential for creating Celtic letter styles due to the specific characteristics of the writing that this tool facilitates. The nib allows for a variety of line widths and tonal differences, which are crucial in achieving the intricate details and flourishes commonly found in Celtic calligraphy.

Celtic lettering often features thick and thin strokes, which the calligraphy nib can produce effectively through its angled design, allowing the artist to manipulate pressure while writing. This technique results in the distinct and stylized letterforms associated with Celtic script, complete with elaborate knots and curves.

In contrast, a brush pen, while versatile, doesn't typically offer the same level of precise control required for the detailed work in Celtic lettering. Similarly, fineliners and gel pens, while useful for illustrating or drafting, lack the flexibility and characteristic stroke variation that a nib provides, making them less suitable for traditional Celtic calligraphy techniques.