Shades and screens for isometric block diagrams
Ronald Lorenz Ives · Economic Geology · 1939
Shading of isometric block diagrams, and the application of distinguishing patterns to stratigraphic units depicted in them, can be greatly simplified by the use of modern art aids such as Ben Day screens and toned papers. Costs of production and reproduction may be greatly reduced, and the quality of the finished figures increased, by the skilful use of these aids. Methods of effectively applying distinguishing patterns are described in this paper.