Catechu Is An Extract Of The Khair Tree Or Acacia Catechu Of Bombay
: ON THE SEMI-NEUTRAL, BROWN.Bengal, and other parts of India. With the exception of such earthy
matters as are communicated to it during the preparation, or are added
purposely as adulterants, catechu is entirely soluble both in water and
alcohol. An aqueous solution has a reddish-brown colour, and gives the
following results:--protosalts of iron thrown down olive-brown and
persalts greenish-brown precipitates; salts of tin and lead yield
brownish-yellow and brick-coloured deposits respectively; while acetate
of copper or bichromate of potash furnishes brown residues. To our
knowledge, none of these have been introduced as pigments, but a brown
prepared by Dr. Lyon Playfair some years back from the catechu bark has
been described as exceedingly rich, transparent, and beautiful; and
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Books It Is Named Vermilion In Allusion To The Insect Or Vermes
from which it is prepared. This insect is the "coccus ilicis," which feeds upon the leaves of the prickly oak in the south of Europe. Like the "coccus cacti," it is covered with a whitish dust, and yields a tinctorial matter soluble in water and alcoh... Brilliancy And Absolute In Permanency Cadmium Red Next Attracts
notice. This new aspirant for artistic fame is a most vivid orange-scarlet, the latter colour predominating, of intense fire, but with no approach to rankness or harshness, yielding delicate pale washes, and blending happily with white in the formatio... Brilliant Ultramarine Factitious Ultramarine Guimet's
... Brown Stil De Grain Citrine Lake Or Quercitron Lake Is Usually
prepared from the berries of Avignon (ramnus infectorius), better known as French, Persian, or Turkey berries; but a more durable and quicker drying species is obtained from the quercitron bark. If produced from the former, it must be branded as fugit... Browns And The Cold Semi-neutral Grays Marrone Is Practically To
shade, what red is to light; and its relations to other colours are those of red, &c., when we invert the scale from black to white. It is therefore a following, or shading, colour of red and its derivatives; and hence its accordances, contrasts, and ... Browns Grays And All Broken Colours It Is Likewise The Second
power in harmonizing and contrasting other colours, as well as in ... But A Mixture Of Black And White; But Pure Or Neutral Black And White
... But Run Under The Names Of Euchrome And Mineral Brown They Have
been introduced into commerce for civil and marine painting. TTITLE CASSEL EARTH, ... By Mixing His Colours With White The Artist Obtains His Tints By
... Called Also Mineral Yellow Has Improperly Been Classed As An
orpiment, from which it differs in not being a sulphide, and in containing lead. It is prepared from arsenic fluxed with litharge, and reduced to powder. It is much like orpiment in colour, dries better, and not being affected by lead, is less liable ... Called Also Mineral Yellow Is Found In Most Countries And Abundantly
in our own. It differs much both in constitution and colour, ranging from a tolerably bright though not vivid yellow to a brown-yellow, and is generally of a warm cast. Its natural variety is much increased by artificial dressing and compounding. The ... Called Also Spanish Ochre Is A Very Bright Yellow Or Roman Ochre
burnt, by which operation it acquires warmth, colour, transparency, and depth. Moderately bright, it forms good flesh tints with white, dries and works well both in water and oil, and is a very good and eligible pigment. It may be used in enamel paint... Called Brown And Enters Largely Into The Complex Hues Termed Buff
bay, tawny, tan, dan, dun, drab, chestnut, roan, sorrel, hazel, auburn, isabela, fawn, feuillemort, &c. Yellow is naturally associated with red in transient and prismatic colours, and is the principal power with it in representing the effects of warmt... Called Green In Landscape And Invisible Green In Mechanic Painting
It is to be noted that in producing these and other compound colours on the palette or canvass, those mixtures will most conduce to the harmony of the performance which are formed of pigments otherwise generally employed in the picture. Thus, presumin... Called When Levigated Body White Is An English White Lead In The
form of scales or plates, sometimes grey on the surface. It takes its name from its figure, is occasionally equal to Crems white in colour, and generally surpasses in body all other white leads. In composition, it is a mixture of protocarbonate and hy... Camboge Gamboage Cambogia Cambadium Cambogium
... Carmine Crimson Lake Scarlet Lake Purple Lake Chinese
... Carmine Pink Madder Rose Madder Madder Lake And Liquid
... Catechu Is An Extract Of The Khair Tree Or Acacia Catechu Of Bombay
Bengal, and other parts of India. With the exception of such earthy matters as are communicated to it during the preparation, or are added purposely as adulterants, catechu is entirely soluble both in water and alcohol. An aqueous solution has a reddi... Charcoal Liege Or Vine Black Is A Well-burnt And Levigated
charcoal prepared from vine twigs, of weaker body than ivory or lamp black, and consequently better suited to the grays and general mixed tints of landscape painting, in which it is not so likely to look black and sooty as the others may do. Of a cool... Chiefly Derived From A Genus Of Leguminous Plants Called Indigofera
found in India, Africa, and America. The colouring matter of these is wholly in the cellular tissue of the leaves, as a secretion or juice; not, however, in the blue state in which one is accustomed to see indigo, but as a colourless substance, which ... Chinese Rouge And Pink Saucers Have Much Of The Qualities Of And
appear to be also prepared from, the safflower. ... Citrine; While Mixed With Purple It Becomes The Other Extreme
... Coeruleum Of Pliny Were A Blue Copper Earth However That May Be In
these days both names signify cobalt compounds, coeruleum being a stannate of cobalt, and cyanine a mixture of cobalt and Prussian blue. Unlike the former, cyanine, being composed of two old colours, can lay no claim to originality. In the fourth chap... Colour
Other things being equal, those artificial ultramarines are most durable which possess the most colour; and all are, perhaps, most permanent in water. If used in that vehicle, care should be taken to employ a gum free from acid; also, whether in wat... Colour Also May Comprise A Similar Series Of Hues Between The Extremes
of the colours composing it. And as the relations of colours have been deduced regularly, from white or light to black or shade; so the same may be done, inversely, from black to white. On this plan the tertiaries, olive, russet, and citrine, take the... Colour It Has Already Been Observed Is Wholly Relative In
contrasting, therefore, any colour, if we wish it to have light or brilliancy, we cast its opposite into the shade; if we would have it warm, we cool its antagonist; and if transparent, we oppose it by an ... Colour Remarks Ruskin Is Wholly Relative; Each Hue Throughout A Work
is altered by every touch added in other places. Thus, to place white beside a colour is to heighten its tone; to set black beside a colour is to weaken its tone; while to put grey beside a colour, is to render it more brilliant. If a dark colour be p... Colours Are Advancing Or Retiring In Their Quality--as Depth
delicacy, &c., not in their hue. A blue object set side-by-side a yellow one will not look an inch farther off, but a red or orange cloud, in the upper sky, will always seem to be beyond a blue cloud close to us, as it ... Colours It Is Composed Of The Extreme Primaries Yellow And Blue
and is most perfect in hue when constituted in the proportions of three of yellow to eight of blue of equal intensities; because such a green will exactly neutralize and contrast a perfect red in the ratio of eleven to five, either of space or power. ... Colours It Is The Coolest As Well As The Nearest In Relation To Black
or shade; in which respect, and in never being a warm colour, it resembles blue. In other respects also, purple partakes of the properties of blue, which is its archeus, or ruling colour; hence it is to the eye a retiring colour, that reflects light l... Colours With The Neutral Black Of The Various Combinations Of Black
those in which yellow, orange, or citrine predominates, have obtained the name of brown, &c. A second class in which the compounds of black are of a predominant red, purple, or russet hue, comprises marrone, chocolate, &c. And a third class, in which ... Colours:--
... Combined With Blue Cool And Retiring It Is However More Congenial
with yellow than with blue, and thence partakes more of the character of the former in its effects of warmth, the influence of light and distance, and action on the eye, by which the power of vision is diminished on viewing this colour in a strong lig... Composition Chemical Analysis Has Shown Several Of The Blues To Be
oxide of copper with a small proportion of iron; none containing cobalt. There is little doubt, however, that the most brilliant specimens--those which retain all their original force and beauty in the temples of Upper Egypt after an exposure of three... Composition Of Black
As a pigment, yellow is a tender delicate colour, easily defiled, when pure, by other colours. In painting it diminishes the power of the eye by its action in a strong light, at the same time becoming less distinct as a colour; while, on the contrar...