Brilliance of color

The following crucial experiment was made ou one of the pictures. It was suspended for twelve months in the open air, under the principal chimney of the New Museum at Berlin during that time it was exposed to sunshine, mist, snow, and rain, and nevertheless retained its full brilliancy of color. 

Chloro-2-aminophenol is used chiefly for the preparation of blue azo dyes which can be after-chromed. Its combinations with chromotropic acid and with acetyl-H acid were the purest chrome blues known before the discovery of the chroming triphenylmethane dyes (eriochrome azurol). The latter dyes are superior in depth and brilliance of color, but are not as fast to light as the azo dyes from 4-chloro.2-aminophenol and chromotropic acid or acetyl-H acid. 

Samples indicating the acceptable range of color, gloss, metallic brilliance, grain and texture, and distinctness of image may be needed and, if not provided by your customer, those that you provide will need customer approval. 

The last-named authority has remarked with reference to British gum prepared by sulphuric acid, that it possesses the disadvantageous property of being deliquescent. This method is, therefore, never employed, as besides this, the products are often colored. He also states that when nitric arid is employed in the preparation of dextrin, it must be perfectly pwe. Commercial nitrio acid, as obtained by the action of oil of vitriol upon nitrats of Soda, always contains a small amount of chlorine and although this element is contained in diminished proportion in the dextrin, it is nevertheless sufficient to considerably lessen the brilliancy of the colors prepared with the dextrin. Several printers upon paper and vegetal tissues have observed this, but have been unable to account for it otherwise than by attributing it to the iaferior quality of the gum. 

Chinese Vermilion, which is so rich in color as to command five or six times the price of the European product, appears to be prepared in the ordinary way, leaving nothing to account for the superior brilliancy of shade except the sunnier climate. By careful selection, the finest portions arc collected, and, if necessary, ground and washed several times. In making the artificial product, one part of sulphur and four of mercury are introduced into an earthen pot, to which an iron cover is luted and bound with wire the pot with its contents is then placed in a fire of dried camel s dung. After sublimation, the cover is removed aud the pot broken, and the purest of the sublimate picked out from, the less-colored product, ground very fine, and the powder sifted into a large vessel of watar. When the red product lias subsided, the supernatant... 

Sesquioxide of Iron—Fe 0.—This is prepared by the calcination of green vitriol, upon the purity of which the brilliancy of the color in a great measure depends, For the calcination a thick cast-iron vessel or earthenware retort is required. During the operation the 5... 

Nacreous and interference pigments are used as colorants or part of color formulations for all applications where traditional pigments are used, but where additional color depth, brilliance, iridescence, color shift (flop), and other spectacular effects are desired [5.253]. Mica-based pigments dominate their combination of pearl and interference effects, brilliance, stability, and weather resistance is unsurpassed. Furthermore, they are non-toxic [5.221],... 

Commercial solvent dyes for leather are employed in a great variety of solvents. It is common practice to use mixed solvents to obtain the requisite physical properties. They are also applied to correct off-shade dyeings and improve the brilliance of shades. Alcohols or glycols are the most common solvents but esters and ketones are also convenient. The colors are normally applied to dyed or undyed tanned leather by spraying from solvent solution or aqueous/organic emulsions. Nowadays, water-based finish recipes, which are combinations of sol-... 

Standard cyan ink-jet dyes are C.I. Acid Blue 9, 42090 [3844-45-9] and C.I. DirectBlue 199, 74190 [12222-04-7], C.I. Acid Blue 9 is characterized by a superior brilliancy of shade and high color strength, but this triphenylmethane dye exhibits a low lightfastness. Copper phthalocyanine dye C.I. DirectBlue 199 is suited for many applications due to its superior lightfastness and thermal stability. To improve its moderate waterfastness on plain paper, novel cyan dyes have been launched based on the differential solubility approach by introducing carboxyl groups into the phthalocyanine moiety [3,12],... 

The beauty of a gem is measured in terms of its clarity, brilliance, and color. Its natural beauty can be enhanced by the way it is cut. There are two basic kinds of gem cuts faceted and cabochon. The faceted cut has many flat cut surfaces (facets) with an overall shape that might be round, oval, square, rectangular, or pear-shaped. Faceted cuts are preferred for brilliant transparent stones such as diamond. The cabochon cut has a smooth rounded top, usually with a flat base, and it is mainly used for opaque or translucent stones. 

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