What is the primary function of B pencils in drawing?

The primary function of B pencils in drawing revolves around their ability to produce darker lines and richer, more expressive shading compared to H pencils, which are harder and create lighter marks. B pencils, which are softer and have a higher graphite content, allow artists to create bold, defined lines that are essential in adding depth and character to a final piece. They are particularly useful for highlighting details and enhancing the overall quality of artwork, making them ideal for refining and darkening lines during the finishing stages of a drawing. This characteristic of B pencils is what distinguishes them in the drawing process, as they allow for more nuanced and dynamic rendering of forms.