What kind of lines are used for section lining in technical drawings?

In technical drawings, section lining refers to the representation of the internal features of an object that has been cut through to show these details. Fine lines are used for section lining because they provide a clear visual distinction between the different sections of a drawing without overwhelming the viewer with heavy markings. This fine line work allows for precise detailing and achieves the necessary contrast when highlighting various materials or components within the sectioned area.

The use of fine lines also helps maintain the overall clarity and readability of the technical drawing, ensuring that important details are visible without creating confusion. This practice aligns with industry standards for technical documentation, where line weight plays a crucial role in conveying information effectively.

The other types of lines used in technical drawings serve different purposes; for example, thick lines might indicate object outlines, dashed lines typically represent hidden features, and curved lines could denote specific forms or contours, but none fulfill the specific role of section lining like fine lines do.