Proportion
Apart from considerations of use and material, the design of this kind of round form is based on inequalities of proportion in height and diameter. Obvious repetitions of the same dimension are to be avoided. The profiles should be carefully composed with a view to effecting harmony or contrast—the curves either approaching one another in a flexible line or being deliberately contrasting. Mouldings may be used at intervals to mark the various stages.
No. 223. Types of Vase Decoration.
A. Horizontal Banding with vertical Contrast.
B. Oblique or Spiral Treatment. C. Panel Treatment.
Vase forms vary considerably. When the profile is formed by straight lines they may be cylindrical or cone-shaped. Of course profiles may take other forms—they may be ovoid or trace an ogee curve. When the diameter varies the bulk should preponderate at some one point. When unity of line is desired, the curves of the profile should flow easily into each other, even if broken at intervals by mouldings. In contrasting curves the lines should intersect at right angles in order to avoid indecision of form.