Similarity with Varying Primary Masses
[Figure 141] is useful for the following purpose. It is desirable at times to develop a number of similar forms for a set, with a gradually increasing ratio of proportions, either in height or width. [Figure 141] shows how the height may be increased while maintaining a common width. Notice the gradual proportionate increase of the height of the neck A-B as well as that of the body. The line X is of the utmost value in ascertaining the height of the intermediate bowls. The eye should now be so trained that the height of the neck A-B on the last bowl can be readily proportioned by eye measurement to that of the first bowl. A line similar to X will give the intermediate points.
[Figure 142] varies the width in a similar manner. Notice the gradually decreasing distances C-D-E-F, the spaces for which may be determined by the eye.
Plate 26
INSTRUCTION SHEET
[Plate 26] suggests the sequential progression of steps leading to the potter's working drawing.
SUMMARY OF DESIGN STEPS
(a) Draw the primary rectangle.
(b) Add limits of functional parts: handle, spout, cover, etc.
(c) Establish unit of measurement for primary rectangle contour curves.
(d) Design contour of primary mass and add the appendages to it, observing the rules pertaining to appendages and unit of measurement.
(e) Dimension and otherwise prepare the drawing for the potter's use. This includes the planning of a working drawing, one-eighth larger in all directions than the preliminary design, to allow for the shrinkage of the clay body. The working drawing should also be in partial sections to show the construction of the interior of the ware.
SUGGESTED PROBLEM
Design a teapot, tea caddy, and cup showing a common unity in contour design. ([Plate 82].)
SUMMARY OF RULES
Rule 5d. Parts of one design differing in function should differ in appearance but be co-ordinated with the entire design.
Rule 5e. In cylindrical forms outline curves with a vertical tendency should have their turning points or units of measurement in accordance with the horizontal divisions of Rules 2a and 2b.
REVIEW QUESTIONS
1. Give and illustrate the rule governing the change in the appearance of the design with the change of functional service.
2. What is the aesthetic value of curves in outline enrichment?
3. Correlate the rule governing the unit of measurement for vertical contour curves with the rules controlling horizontal divisions.
4. Show, by a diagram, the method of systematically varying the contours of circular forms: (a) by changing the horizontal divisions; (b) by varying the proportion of the primary mass.
5. What is the value of accenting the functional parts in clay design?
Courtesy of James Milliken University
Figure 142a.—Outline and Surface Enrichment in College Pottery