A non-technical and brief description of each process follows. All designs in this chapter may be identified by referring to the process numbers after the figure description as 1, 3, 5; 2, 4, 6, corresponding to the key numbers on [Plate 52]. A design to be submitted to the craftsman should be a graphic record of technical facts in addition to good design, which requires that we should have an expressive technical means of rendering each process. The last column, on [Plate 52], indicates this rendering. In addition to this rendering each one of the eight technical processes has been carried through three design steps. 1. (first column, [Plate 52]) Planning the original primary mass, with its inceptive axis suggested by the structure and intended use. It passes through the point of concentration. 2. (second column, [Plate 52]). The division of the primary mass into zones of service and enrichment with the suggestion of the leading lines which, at some points, are parallel to the contours and lead up to the point of concentration. The contours in this column have, in several instances, been changed to add lightness and variety to the problem. 3. The last step (column three, [Plate 52]) shows the design with graphic rendering suggestive of the completed process.
Plate 52
Technical Processes and Methods of Illustrating Same in a Design
Piercing
1. Removal of design unit or background by means of the jeweler's saw. Bridges of metal should be left to support firmly all portions of the design. Test this by careful study of the design. Rendering—shade all pierced portions of the design in solid black. Slightly tint portions of the design passing under other parts. Illustration, [Figure 336].
Rule 10j. All surface enrichment should have an appearance of compactness or unity. Pierced spots or areas should be so used as to avoid the appearance of having been scattered on the surface without thought to their coherence.
Etching
2. Coating either design or background with an acid resistant, to be followed by immersion of the article in an acid bath. Allow the unprotected portion to be attacked and eaten by the acid to a slight depth. Rendering—slightly tint all depressed or etched parts of the design. Illustration, [Figure 339].