60 Welding Print Reading Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Thin Section A thin section or section not thick enough for conventional section lining (sheet metal, gaskets, etc.) is shown as solid black lines, Figure 5-19. Full Section A full section is shown when the cutting-plane line passes entirely through the object, Figure 5-20. The interior features of the object are revealed. Figure 5-19. This shows a thin section. A—Sections too thin for conventional crosshatching are shown as solid black lines. B—Adjacent thin sections are separated by very narrow white spaces. A B Figure 5-20. Note how the full section is shown when the cutting-plane line passes completely through the part.