①Round paintbrush: the oldest kind of oil paintbrush. It has a blunt nib, which can be used to make smoother and softer strokes; the small round oil brush can be used to hook lines, and the side forward can produce a large area of fuzzy color halo. It can also be used for stippling techniques.
②Flat-headed brushes: Flat-bodied, flat-headed oil brushes did not appear until the 19th century. It is used to make wide, drag-sweeping brushstrokes; you can draw rough lines with the side of the flat head; rotate the pen body for drag-sweeping pens, and strokes of uneven thickness can appear.
③Hazel-shaped brush: flat round head, also called “cat tongue pen”. It has the characteristics of both round and flat brushes, but it is difficult to control. It is a more elegant and smooth brush when expressing curvilinear strokes.
④Fan-shaped brush: It is a new type of special oil brush with sparse brush hairs and a flat fan-shaped brush. Used for swiping and brushing in wet painting, or to soften overly distinct contours. Painters who like thin painting often use this brush. When using the fan-shaped pen to rub colors, you must keep it clean, otherwise, it will hinder its dexterity.