All Chromatography Page 5
By partially decomposing yellow ochre with prussiate of potash, we have produced a fine dark blue-green, resembling Prussian green, of great depth and transparency. There are, however, difficulties in the process; and the results do not warrant us i...
is French or artificial ultramarine before the final roasting. It is a somewhat bright bluish-green, becoming a dull greenish-blue on continued exposure. Chemically, it is not a bad colour; but artists generally have decided against it. ...
or Chestnut Brown, is a brown lake prepared from the horse-chestnut. This now obsolete pigment is transparent and rich in colour, warmer than brown pink, and very durable both in water and oil; in the latter of which it dries moderately well. ...
Whether the new metal indium will ever be found in sufficient quantity to render it practically useful remains to be seen. The most abundant source at present known is the Freiberg blende, 100,000 parts of which only yield from twenty-five to forty ...
It is curious that iodine, which gives a yellow with lead, should also afford a blue with the same metal. When a solution of iodine in aqueous soda (carbonate of soda is not so good) is added to nitrate or acetate of lead-oxide, a transient violet-r...
There may be obtained from iodine and mercury a very pretty pink colour, analogous in composition to pure scarlet. It is apt to pass into the scarlet modification, and is in other respects even less to be depended on than that variety. ...
Or iodide of lead, is one of those compounds whose presence on the palette should never have been allowed. Exceedingly brilliant, it is also utterly fugitive, destroyed by exposure or foul gas, and useless in admixture. We may state here that, whate...
The rare metal iridium affords a blue which is a mixture of the oxide and the sesquioxide. But being slightly soluble in water and decolourised by sulphuretted hydrogen, it would not, other considerations apart, be an acquisition. ...
native or artificial, are well represented on the palette, but nothing would be easier than to increase their number. Of all metals, iron is the richest source of colour, capable of affording all colours with the exception of white. None of them, ho...
Or oxalate of protoxide of iron, has very unadvisedly been recommended as a pigment. It is a bright pale yellow, but soon loses the beauty of its tint when submitted to air and light, becoming, by peroxidation, red and buffy. Even in a book the colo...
Is an ancient pigment, perhaps the earliest of the European lakes, and ...
is a French pigment, a species of chromic orange, similar to the orange chromate of lead. This name is likewise given to orange oxide of iron. ...
In 1861 it was stated that Professor Lawson had prepared a new dye of great richness, in the laboratory of Queen's College, Canada, from an insect, a species of coccus, found the previous summer for the first ...
or Marrone Lake, was a preparation of madder, of great depth, transparency, and stability. Working well in water, glazing and drying in oil, and in every respect a good pigment, it was one of those colours which gradually--and often, as in this case...
or Orange Lake. It has been said that the yellows so-called produced from madder are not remarkable for stability, differing therein from the reds, purples, russets, and browns. Like them, this 'orange' is of doubtful colour and permanence, and not ...
Browns And The Cold Semi-neutral Grays Marrone Is Practically To
Also Called Scarlet Chrome Is A Bright Chromate Of Lead Of An
Belong The Dutch And Flemish Schools; The Sensible Which Aims At
Composition Chemical Analysis Has Shown Several Of The Blues To Be
Less Known As English Red Prussian Red And Scarlet Ochre True
Olive In Dark Green; Russet And Citrine In Dark Orange The
Pitch And [greek: Kallos] Ornament The Blue Is Named Pittacal
Pigment The [greek: Kinnabari] Of The Greeks And The Minium--a Term
Peculiar Red Mineral Orange
For Artists Such Are Harding's And Macpherson's Tints Composed Of
We Have Adopted The Term Marrone Or Maroon As It Is Sometimes Called
Softer Texture Some Of My Friends Says Bouvier Call It Beggars'
Russet Hues Of Autumn Foliage Where Purple And Orange Have Broken Or
Uniform Colour Thus Composed Is The Citrine Colour Of Fruit And