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Rule 10g. _The inceptive axis should pa.s.s through and coincide with one axis of a stone and at the same time be sympathetically related to the structure._
Rule 10h. _The position of the inceptive axis should be determined by: (1) use of the project as ring, pendant, or bar pin, (2) character of the primary ma.s.s as either vertical or horizontal in proportion._
Rule 10i. _Caution should be exercised with regard to the use of enamel. Over-decoration by this material tends to cheapen both process and design._
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._
Rule 10k. _Built, carved, and chased enrichment should have the higher planes near the point of concentration. It is well to have the stone as the highest point above the primary ma.s.s.
When using this form of enrichment, the stone should never appear to rise abruptly from the primary ma.s.s, but should be approached by a series of rising planes._
Rule 10l. _The lanes or margins between enameled spots should be narrower than the lane or margin between the enamel and the contour of the primary ma.s.s._
Rule 10m. _Transparent and opaque stones or enamel should not be used in the same design._
SURFACE ENRICHMENT OF BASE AND PRECIOUS METALS FOR LARGE PRIMARY Ma.s.sES
Rule 11a. _The preliminary steps toward surface enrichment should be thought out before they are drawn._
Rule 11b. _Conservative application should mark the use of surface enrichment of large ma.s.ses. Its use should: (1) lighten or soften necessarily heavy construction; (2) support or apparently strengthen good structure; (3) add interest to large unbroken and uninteresting surfaces._
Rule 11c. _The type of design unit for large ma.s.ses should be bolder than similar designs for small primary ma.s.ses._
Rule 11d. _The eye should be attracted to one princ.i.p.al zone of enrichment, whether located upon the primary ma.s.s, appendage, terminal, links, or details. All other zones should be subordinate to this area._
Rule 11e. _Two periods of historic ornament should not be introduced into the same design._
Rule 11f. _Repulsive forms should not be introduced into surface enrichment._
APPLICATION OF COLOR TO LARGE AREAS VALUES
Rule 12a. _An average wood stain is to be retained between the values middle and low dark._
Rule 12b. _An average wall hue is to be retained between the values light and middle._
Rule 12c. _An average ceiling hue is to be retained between the values white (minus) and light._
Rule 12d. _The relation between the side walls and furniture, trim, etc., should be retained within the range of four values or less, as low light and dark._
Rule 12e. _The relation between the side walls and ceiling should be within the range of three values or less, as high light and low light._
HUES
Rule 12f. _Color schemes for wood work and side walls should preferably be selected from one of the following groupings: a.n.a.logous, contrasted, or dominant arrangements of hues.
a.n.a.logous grouping is preferable where variety of hue is desirable._
Rule 12g. _Ceilings should be colored by a lighter tint of the side walls or by a lighter tint of an a.n.a.logous hue._
CHROMA
Rule 12h. _Stains are usually not reduced to below three-fourths chromatic intensity. Nearly gray side walls, however, call for a reduction to one-fourth intensity._
Rule 12i. _Wall colors are usually reduced to three-fourths chroma to a minimum reduction of slightly less than one-fourth chroma._
Rule 12j. _Ceilings should usually be reduced in chroma to three-fourths intensity, with slightly less than one-fourth chroma as a minimum reduction._
DISTRIBUTION
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 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, (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._
