The Painter in Oil / A complete treatise on the principles and technique necessary to the painting of pictures in oil colors

by Daniel Burleigh Parkhurst

False Tone.—This is not to be attained by painting the picture regardless of color relations, and then glazing or scumbling some color all over the whole. This is the false tone of some of the older historical painters, particularly of the English school of the earlier part of this century. They "painted" the picture, and then just before exhibiting it "toned" it by glazing it all over with a large brush and some transparent pigment, generally bitumen. This did, in fact, bring the picture in tone after a fashion. But it is not a colorist's method. It is the rule of thumb method of a false technique and a vicious color sense. True tone is not something put onto the picture after it is painted. It is an inherent part of its color conception, and is worked into it while the picture is being painted, and grows to perfection with the growth of the picture. It is of the very essence of the picture. It is the dominant balance of color qualities; the result of a perfect appreciation of the value of every color spot which goes to the expression of the artist's thought.

In one sense it is the same as atmosphere in that the tonality of the picture is the atmosphere which pervades it. It may perhaps be best described by saying that it is that combination of color which gives to the picture the effect of every object and part in it having been seen under the same conditions of atmosphere; having been seen at the same time, with the same modification, and with the same degree and quality of light vibration. Tone is color value as distinguished from value as degree of power as light and shade; and in this is the perfection of subtlety of color feeling.

Tone Painters and Colorists.—Some painters have been called "tone painters," while others have been called "colorists;" not that tone painters are not colorists, but that there is a difference. It is a difference of aim, a difference of desire. Those painters who are usually called colorists, like Titian and Rubens, are in love with the richness and power of the color gamut. They are full of the splendor of color. They paint in full key, however balanced the canvas. Each note of color tells for its full power. Their stop is the open diapason, and their harmony is the harmony of large intervals and full chords.

The tone painter deals with close intervals. He is in love with subtle harmonies. What he loves is the essence of the color quality, and not its splendor. With the closest range he can give all possible half-tones and shades and modulations of color, yet never exceed the gray note perhaps; never once go to the full extent of his palette-power.

The utmost delicacy of perception and feeling, and the most perfect command of materials and of values, are necessary to such a painter. Above all, is he the "painter's painter," for the infinite subtlety and the exquisiteness of power are his. And yet this is the thing least appreciated by the lay mind, the most difficult to encompass, and requiring the most knowledge to appreciate.

Scientific Color.—To the scientist color is simply the irritation of the nerves of the retina of the eye by the waves of light. Different wave lengths give different color sensations. It is the generally accepted theory now that there are three primary sensations; that is, that the eye is sensitive to three kinds of color, and that all other shades and varieties of color are the results of mingling or overlapping of the waves which produce those three colors, and irritating more or less the nerves sensitive to each color simultaneously. These three primary colors are now stated to be red, blue, and green. The older idea was that they were red, blue, and yellow; and was based on experiments with pigments. Pigments do give these results; for a mixture of blue and yellow pigment will give green, and a mixture of red and green pigment will not give yellow, while the reverse is the fact with light.

White light is composed of all the colors. And the white light may be broken up (separated by refraction or the turning aside of light rays from their true course) into the colors of the rainbow, which is itself only this same decomposition of light by atmospheric refraction. Black is the absence of light, and consequently of color. This is not the case with pigment, for pure pigment has never been produced. The pigment simply reflects light rays which fall on it; that is, pigments have the power of absorbing, and so rendering invisible, certain of the rays which, combined, make up the white light which illumines them; and of transmitting others to the eye by reflection. We see, that is, our nerves of sight are irritated by, those rays which are not absorbed, but which are reflected.

All pigment is more or less absorbent of color rays, and more or less reflective of them; certain color rays being absorbed by a pigment, and certain other rays being reflected by it. The pigment is named according to those rays which it reflects. As a color-producing substance, then, the pigment is practically a mirror reflecting color rays. But a true mirror would reflect all rays unmodified. If we could paint with mirrors, each of which would reflect its own color unsullied, we could do what the scientist does with light; but the painter deals with an imperfect mirror which gives no color rays back unsullied by rays of another class, and so our results cannot be the same as the scientist's. So that just in accordance with the degree of purity of transmitting power of a pigment will be the purity of the color which we get by its use. But absolute purity of pigment we cannot get, so we cannot deal with it as we do with light, and we deal with a practical fact rather than a scientific fact, as painters.

Primaries and Secondaries.—As all the other shades of color are produced by the combinations (over-lappings) of the waves or vibrations in the light rays from the primary colors, we have a series of colors called secondaries, because they are made up of the rays of any two of the three primaries: as purple, which is a combination of blue and red. When dealing with light the secondaries are: shades of violet and purple from red and blue; shades of orange red, orange, orange yellow, yellow, and yellowish green from red and green; and bluish green and greenish blue from blue and green—the character of the color being decided by the proportions of the primaries in the mixture.

These conclusions have been reached mainly through experiments in white light. The primaries so obtained do not hold good with pigment, as I have stated, but the principles do. It will avoid confusion if I speak hereafter of the combinations as they occur with pigment, it being borne in mind that it is a practical fact that we are dealing with rather than a scientific one.