Primuline, discovered in 1887 by Mr. A. G. Green, an English chemist, is a dye of a primrose color, possessing a great affinity for cotton fibers, to which it is readily fixed by simply immersing the material for a few moments in a hot solution of
This process gives black positive impressions on white ground from positive cliches, and negative impressions from negative cliches. It has been attributed to Mr. Colas, but in reality it was invented by Mr. Poitevin, who describes it as follows
White Lead {Lead. / Sulphide of Lead (Black.) {Carbonic Acid. Such is the theory of the reaction which might take place, but which, as far as our own experience goes, does not. Some deep cadmium yellow which we our
Landscape Painter, and, without hesitation, pronounce it to be the most valuable addition to the 'colour box' since the introduction of Rose Madder. It has supplied a deficiency of a very important character. Hitherto, no Primitive Yel
permanence and unaltered purity of its lightest and faintest tints we are assured may be confidently relied upon, inasmuch as they have been fully established by the most severe tests to which colour can be subjected, by several of our
production of his works, but it must also be considered as a
138. The architect who designates the number and location of outlets for the lighting sources, and specifies the candle-power of the lamps, knows nothing of the ultimate decoration of the house. Very often the specifications are finished before the
80. Citrine is an advancing color, because while it contains some blue in the green of its composition, it contains a preponderance of yellow and orange; slate is a receding color, because while it contains some yellow in the green of its composi
153. The introduction of light by the medium of a wire, which may be carried to any point in a room, encourages so many possibilities for comfort and effect that it behooves us to forget traditional customs which were established during the gasli
135. In considering artificial light, we will avoid all efforts to analyze the different forms of energy, magnetic energy, electric energy, heat energy, mechanical momentum, radiating energy, and deal with result rather than with cause and effect
30. We do not wish to be understood as stating that the work of the colorist is solely mechanical; but we would emphasize that the influences of color are very largely the result of studied proportions. The basis upon which one operates must be s
THE storage and transfer of aesthetic emotion explain yet another fact, with which indeed I began this little book: namely that the word Beautiful has been extended from whatever is satisfactory in our contemplation of shapes, to a great number of c
OUR examination has thus proceeded from aesthetic contemplation to the work of Art, which seeks to secure and satisfy it while furthering some of life's various other claims. We must now go back to aesthetic contemplation and find out how the behold
HAVING settled upon a particular point of view as the one he liked best, he remained there in contemplation of the aspect it afforded him. Had he descended another twenty minutes, or looked through powerful glasses, he would have seen the plain belo
TO explain how art in general, and any art in particular, succeeds in reconciling these contradictory demands, I must remind the Reader of what I said (p. 93) about the satisfactory or unsatisfactory possibilities of shapes having begun to be notice
SOME of my Readers, not satisfied by the answer implicit in the last chapter and indeed in the whole of this little book, may ask a final question concerning our subject. Not: What is the use of Art? since, as we have seen, Art has many and various
"I use a paper prepared with iron sesquioxide rendered sensitive to light by tartaric or, better, citric acid in concentrated solution. This paper, after desiccation and exposure to light, possesses the property of reducing the solution of silver
The Artigues process, so called, is, without any doubt, the best to be employed for the reproduction of plans and drawings in lines. It is simple, expeditious, and yields black impressions on a very pure white ground which are absolutely permanen
The images are veiled. This defect may result from various causes, viz.: 1st. The stock ferric oxalate solution is impaired by a partial reduction of the ferric salt into ferrous oxalate. The solution should be preserved in an o
In all the photographic processes by precipitation of metallic oxides the quality of the paper has a great influence on the results. When the paper is not well sized and not well calendered, the sensitizing solution is absorbed, instead of simply
"A capital process for many purposes," says Mr. Burnett, "is to float or steep the paper in a mixed solution of bichromate of potash and sulphate of copper, as for Hunt's chromotype process.(36) I have mixed gelatine, or occasionally grape sugar,