(E) Zone of Enrichment: free balance over full surface.
Type of Design: Semi-decorative motive preferably covering the entire surface.
Inceptive Axis: Masses freely balanced over the geometric center of the area.
Point of Concentration: Near, but not in the exact center.
Illustrations: [Figures 293], [294], [295], [296], [297], [298].
Note: The points of concentration should be accented by slight contrast of value and hue. See [chapters] on color.
Plate 51.—Instruction Sheet
Shallow Circular Forms, Plate 48
Problems: Plates, saucers, ash trays, card receivers, almond and candy bowls.
Marginal Enrichment
(A) Zone of Enrichment: margin of interior surface; margin of exterior surface.
Type of Design: Bands or borders thoroughly related to the structural contours. Bands for exterior enrichment may be placed directly on the contour, [Figures 299] and [301], thus forming an accented contour (F) or slightly removed from it, as in [Figure 300].
Inceptive Axes: For interior surfaces, the radii of the contour circle generally supply the axes of symmetry.
Points of Concentration: For interior surfaces, the points of concentration may be placed in or near the radii of the area.
Illustrations: [Figures 302], [303], [304], [305], [306].
Low Cylindrical Forms, Plate 49
Marginal Enrichment
Problems: Cups, pitchers, steins, nut and rose bowls, low vase forms.