Visual inspection is a relatively new non-destructive method for testing metallic and non-metallic materials for surface-open defects. This book covers the physical and procedural fundamentals of the method. It then presents the testing systems, devices, testing, and evaluation techniques for visual material inspection. The author describes the classification and assessment of indications and highlights the limitations of the testing method. He provides recommendations for relevant occupational and environmental safety and equips the materials tester with the necessary tools for practical work, including the most important standards and regulations to be observed. The author, Prof. Dr.-Ing. Karlheinz Schiebold, is a recognized specialist in the field of non-destructive material testing with many years of experience.