Example Be In A State Which Chemists Have Termed Protoxide They Are
: ON COLOURS AND PIGMENTS GENERALLY.liable to absorb oxygen on exposure to light, air, or moisture, and
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Deep Green; Or When The Russet Inclines To Orange A Gray Or
... Described As Cory's Brown Madder
... Desiccation Or Drying The Well-known Additions Of The Acetate Or
sugar of lead, litharge, and sulphate of zinc, either mechanically ground, or in solution, for light colours; and japanner's gold size, or oils boiled upon litharge, for lakes; or, in some cases, manganese and verdigris for dark colours, are resorted ... Distilled Verdigris Or More Properly Refined Verdigris The Best Is
made at Montpellier in France, and is a sub-acetate of copper of a bright green colour inclining to blue. The least durable of the copper greens, it soon fades as a water-colour by the action of light, &c., and becomes first white and ultimately black... Drive The Colour Too Bare Ie Never To Empty The Brush Too Closely
but always to replenish before more is actually required. This first wash of colour not only gives a tone to the paper, but secures the pencil sketch from being rubbed out. The reason why, in this compound, yellow ochre, as a yellow, is preferred t... Egypt The Greeks Obtained The Knowledge Of Their Ars Chromatica
which they are said to have carried by gradual advances during several centuries, from the monochromatic of their earlier painters, to the perfection of colouring under Zeuxis and Apelles, 450 to 350 B.C. Unfortunately, not long after, or about 300 B.... Employed Under The Name Of Liquid Asphaltum
TTITLE BISTRE is extracted by watery solution from the soot of wood fires, whence it derives a strong pyroligneous scent. It is a very powerful citrine-brown, washes well, and has a clearness suited to architectural subjects. Its use is confined ... Enamel Blue Vienna Blue Paris Blue Azure &c And Are
obtained by the action of heat on mixtures of earthy or metallic bases with cobalt. They are divisible into three classes--the stannic cerulian blue, the aluminous cobalt blues, and the siliceous smalts. Of these, the first possesses the least depth; ... English Red Persian Red Prussian Red Spanish Red Brown
... English Vermilion Spanish Brown Majolica Redding Ruddle
... Even Now It Is Urged By Some To The Disparagement Of The British
school, that it excels in colouring; as if this were incompatible with any other excellence, or as if nature, the great prototype of art, ever dispensed with it. The graphic branches of painting, owe everything to colour, which, if it does not constit... Example Be In A State Which Chemists Have Termed Protoxide They Are
liable to absorb oxygen on exposure to light, air, or moisture, and ... Extract From Mr Aaron Penley's English School Of Painting In Water
... Extracted From The Bignonia Chica By Boiling Its Leaves In Water
decanting the decoction, and allowing it to cool, when a red matter falls down, which is formed into cakes and dried. Insoluble in cold water, it dissolves in alcohol and alkalies; is precipitated from alkaline solutions by acids without alteration; a... Extremes And Greys Their Intermediates Thus Black And White Are
constituted of, and comprise latently, the principles of all colours, and accompany them in their depth and brilliancy as shade and light. ... Ferrocyanide Of Iron &c Was Accidentally Discovered In 1710 By
Diesbach, a colour-maker at Berlin. It is a compound of iron and cyanogen, of varying composition, formed by adding yellow prussiate of potash to a persalt of iron, or by oxidizing the precipitate obtained from the prussiate and a protosalt. The fines... Field's Purple Or Purple Rubiate Is The Only Durable Organic
purple the palette possesses. Marked by a soft subdued richness rather than by brilliancy, it leans somewhat towards marrone, and affords the greatest depth of shadow without coldness of tint. Unfortunately, in the whole range of artistic pigments the... Fineness Of Texture Is Produced By Extreme Grinding And Levigation
Pigments ground in water in the state of a thick paste, are miscible in oil and dry therein firmly; and in case of utility or necessity, any water-colour in cake, being rubbed off thick in water may be diffused in oil, the gum acting as a medium of un... Firm Line--not Wash--of Carmine (of Madder Preferable--ed) Passed
within the outline on the shade side only of the leaf, will give to the whole the look of a bright scarlet surface, but with an indescribable superadded charm, that no merely flat colour can possess." In the same branch of art, illumination, cadmium o... For Artists Such Are Harding's And Macpherson's Tints Composed Of
pigments which associate cordially, and sold ready prepared in cakes and boxes for miniature and water painting. Of the four grays in use--mineral gray, ultramarine ash, neutral tint, and Payne's gray--the two first are quite unchangeable, and the o... From The Semi-neutral Gray In Not Being Coloured By Any Primary
secondary, tertiary, or semi-neutral; hence any blue, purple, olive, or gray added to it, at once destroys the neutrality of grey, and converts it into gray. Thus easily defiled and changed in class, grey is rather a theoretical than a practical colou... Fugitive But We May Briefly Explain It By Saying When Vitreous
pigments are reduced to that extreme state of division which the palette requires, they lose the properties they possess in a less finely divided ...