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Rule 12k. _Proportionate distribution of hue, value, and chroma in surface enrichment calls for a small area high in chroma and contrasting in value to the rest of the surface, but harmonizing with it. This is usually located in the area of concentration. The larger areas are to be sufficiently reduced in chroma and value to form a slight contrast with the background._
HUES FOR SMALL OBJECTS
Rule 12l. _One hue, or a group of a.n.a.logous hues should dominate all color schemes. The point of concentration may be emphasized by one hue related to the other hues by (1) contrasted, (2) dominant, (3) a.n.a.logous, or (4) complementary relations. This hue should make slightly stronger value and chroma contrast than the remaining hues._
VALUES FOR SMALL OBJECTS
Rule 12m. _An extreme range of five values is generally sufficient to supply contrast to a design but still retain its value unity. Restraint in the use of values is essential._
CHROMA FOR SMALL OBJECTS
Rule 12n. _The amount of chroma may be increased in proportion to the decrease in the decorated area. Exceptions may be made to this under Rule 12o._
Rule 12o. _Small one or two-hued projects in clay, designed to be used as a part of the decorative color scheme for a room should bear a contrasted, dominant, a.n.a.logous, or complementary relation to the side walls of the room. The project may be much higher in chroma than the side walls._
Rule 12p. _Correct color for surface enrichment should neither apparently rise above nor drop below the surface to which it is applied, but should stay upon the plane of that surface.
Correct value and chroma range will accomplish this._
REVIEW QUESTIONS
1. State the value of mono-hued pottery in the decorative scheme of a room.
2. What are generally used as stains for clear glazes; matt glazes?
3. What is highest in chroma--matt, or clear glaze?
4. Make a table of metallic oxides and the hues produced by them.
5. Why will iron and copper oxides produce a yellow green stain? What stains will be produced by cobalt and copper oxides; cobalt and manganese oxides; cobalt and nickel oxides?
6. Describe the type of room which you regard as best fitted for clear glazed pottery forms; matt glazed pottery forms.
7. Define harmony of color.
8. What is meant by proportionate distribution? Describe proportionate distribution.
9. Give the value, hue, and chroma range for small areas. See Rules 12l, 12m, and 12n.
10. How does the size of the area to be enriched by color affect the color medium, _i.e._, stains, glazes, enamels, etc.?
11. Describe enamels, their types, characteristics, and range of hues. Consult catalogs for fuller possibilities.
12. What is the effect of oxidation; what is its value?
13. Describe fully complementary arrangements and give ill.u.s.trations for enamel on silver or copper.
14. State the color scheme for a fob to be worn with a blue-green dress; with a gray suit for a man.
15. Select a stone for a silver brooch that would harmonize with a light blue dress; for a dress of orange dark hue and value. See catalogs of dealers in semi-precious stones for color of stones.
16. What problems of hue, value, and chroma would arise in Question 15?
SUMMARY OF THE GENERAL AND SPECIAL RULES IN THE PRECEEDING CHAPTERS
HORIZONTAL AND VERTICAL PRIMARY Ma.s.sES
Rule 1a. _A primary ma.s.s must be either vertical or horizontal according to the intended service, unless prohibited by technical requirements._
PROPORTIONS OF THE PRIMARY Ma.s.s
Rule 1b. _The primary ma.s.s should have the ratio of one to three, three to four, three to five, five to eight, seven to ten, or some similar proportion difficult for the eye to detect readily and a.n.a.lyze._
HORIZONTAL s.p.a.cE DIVISIONS
Rule 2a. _If the primary ma.s.s is divided into two horizontal divisions, the dominance should be either in the upper or the lower section._
Rule 2b. _If the primary ma.s.s is divided into three horizontal divisions or sections, the dominance should be placed in the center section with varying widths in the upper and lower thirds._
SEQUENTIAL PROGRESSION OF MINOR HORIZONTAL s.p.a.cE DIVISIONS
Rule 2c. _A primary ma.s.s may be divided into three or more smaller horizontal ma.s.ses or sections by placing the larger ma.s.s or ma.s.ses at the bottom and by sequentially reducing the height measure of each ma.s.s toward the smaller division or divisions to be located at the top of the ma.s.s._
VERTICAL s.p.a.cE DIVISIONS
Rule 3a. _If the primary ma.s.s is divided into two vertical divisions, the divisions should be equal in area and similar in form._
Rule 3b. _If the primary ma.s.s is divided into three vertical divisions, the center division should be the larger, with the remaining divisions of equal size._
Rule 3c. _In elementary problems, if more than three vertical divisions are required, they should be so grouped as to a.n.a.lyze into Rules 3a, and 3b, or be exactly similar._
APPENDAGES
Rule 4a. _The appendage should be designed in unity with, and proportionately related to, the vertical or horizontal character of the primary ma.s.s, but subordinated to it._
Rule 4b. _The appendage should have the appearance of flowing smoothly and, if possible, tangentially from the primary ma.s.s._
