In all the talk of feudal rights, the knights and bishops must never forget the woolworkers, nor was it easy to do so, for all along the road to Italy they passed the Florentine pack trains going home with their loads of raw wool from England and rough Flemish cloth, the former to be spun and woven by the Arte Della Lana and the latter to be refined and dyed by the Arte Della Calimala with the pigment recently discovered in Asia Minor by one of their members, Bernardo Rucellai, the secret of which they jealously kept for themselves.

Macrophages laden with brown pigment were seen in some of the alveoli, and the intima of some of the small arteries was thickened by fibrous tissue.

As it was, it took the pigment well for six hours, enough for our purpose, and held it firmly in setting.

The plaster was sound, the intonaco firmly attached all over, and the pigment solidly incorporated with it in all but a few unimportant places.

Crocoite was used as a pigment, and after the discovery that the mineral chromite also contains chromium, this mineral was used to produce pigments as well.

It was used for a long time as a pigment and for corrosion resistant plating on steel while cadmium compounds were used to stabilize plastic.

The possibility to use cadmium yellow as pigment was recognized in the 1840s but the lack of cadmium limited this application.

The cause for this was uncertain as there could have been natural causes, although a study by Pyatt et al proposed that the bodies may have been painted with a copper-based pigment.

Similarly, green deposits were found in the hair, originally thought to be a copper-based pigment used for decoration, however it was later found to be the result of a reaction between the keratin in the hair and the acid of the peat bog.

Mezzo-fresco is painted on nearly-dry plaster was defined by the sixteenth-century author Ignazio Pozzo as " firm enough not to take a thumb-print " so that the pigment only penetrates slightly into the plaster.

He found that the black pigment was associated with a layer of mucus just beneath the skin.

This work, like that of the decade-earlier report of high-conductivity in a polypyrrole, was " too early " and went unrecognized outside of pigment cell research until recently.

The pigment was often made from ground semiprecious stones such as lapis lazuli and the binder made from either gum arabic or egg white.

The small shell of the Murex trunculus was broken in order to extract the pigment that was so rare it became the mark of royalty.

As a natural pigment, it ( along with its chemical cousins ochre and umber ) was one of the first pigments to be used by humans, and is found in many cave paintings.

The name of this pigment was classically referred to by the French term, " terre de Sienne brulée ".

The pigment was most extensively used during the 14th through 15th centuries, as its brilliance complemented the vermilion and gold of illuminated manuscripts and Italian panel paintings.

Most likely imported to Europe through Venice, the pigment was seldom seen in German art or art from countries north of Italy.

It was also ground and processed to make the pigment ultramarine for tempera paint and, more rarely, oil paint.

As this tendency coincides with the period that he was less popular among the wealthy, some historians have suggested that a reason for his predilection for black and white pigment was the low price of these colors as compared with the costly lakes and carmines.

The pigment was expensive and complex to produce, and items colored with it became associated with power and wealth.

Buon fresco technique consists of painting in pigment mixed with water on a thin layer of wet, fresh ( hence the name ) lime mortar or plaster, for which the Italian word for plaster, intonaco, is used.

Because of the chemical makeup of the plaster, a binder is not required, as the pigment mixed solely with the water will sink into the intonaco, which itself becomes the medium holding the pigment.

The buon fresco technique consists of painting in pigment mixed with water on a thin layer of wet, fresh, lime mortar or plaster.

Tempera, also known as egg tempera, is a permanent fast-drying painting medium consisting of colored pigment mixed with a water-soluble binder medium ( usually a glutinous material such as egg yolk or some other size ).

Unlike pigment, dyes dissolve when mixed into a liquid.

A small quantity of pigment mixed with a lot of white binder, however, will appear desaturated and pale, due to the high quantity of escaping white light.

Gesso ( Italian: " chalk ," from the Latin gypsum, from the Greek γύψος ) is a white paint mixture consisting of a binder mixed with chalk, gypsum, pigment, or any combination of these.

The general method for these paintings was to apply a thin layer of binder mixed with pigment directly onto uncoated and untreated canvas, and to paint significantly thinned oils directly onto this layer, creating a dense mixture of overlapping colors and shapes.

Alizarin crimson is a dye bonded onto alum which is then used as a pigment and mixed with ochre, sienna and umber.

The historical photography process of gum bichromate photography uses gum arabic mixed with ammonium or potassium dichromate and pigment to create a coloured photographic emulsion that becomes relatively insoluble in water upon exposure to ultraviolet light.

The pigment is mixed with water on a small layer of wet lime mortar or plaster, where it is later absorbed.

Mountbatten became so convinced of its efficacy as a camouflage during the dawn and dusk periods, before the sun was visible but was near enough to the horizon to tint the sky this shade of pink, that he had all of the destroyers of his flotilla ( the 5th Destroyer Flotilla ) painted with a similar pigment, a medium grey ( 507B ) with a small amount of Venetian Red mixed in.

Traditionally, the pigment was considered unstable in oil paints, and was sometimes isolated from other colors and not mixed.

These complements are not identical to those in pigment mixing ( such as are used in paint ), but when lights are additively mixed in the correct proportions appear as a neutral grey or white.

There is no straight-line relationship between colors mixed in pigment, which vary from medium to medium.

Also gouache-like is the overall effect, which tends to be matte as compared to the glossier oil, but this too is a property that will vary, depending on the pigment used and on any mediums ( or diluents ) mixed into it, as well as on the pastiness of the paint ( as a general rule, the pastier, the glossier ).

Unlike " soft " or " French " pastel sticks, which are made with a gum or methyl cellulose binder, oil pastels consist of pigment mixed with a non-drying oil and wax binder.

Chinese blue and white porcelain was once-fired: after the porcelain body was dried, decorated with refined cobalt-blue pigment mixed with water and applied using a brush, coated with a clear glaze and fired at high temperature.

Because the pigment tends to oxidize and darken on exposure to air over time, and it contains lead, a toxic, heavy metal, it has been largely replaced by another pigment, Cadmium Yellow ( mixed with enough Cadmium Orange to produce a color equivalent to chrome yellow ).

Variegated plants very often give rise to sports that are the result of the reshuffling of cell layers during bud formation, producing foliage with mixed pigment sections.

In the original version of the printing process, carbon tissue ( a temporary support sheet coated with a layer of gelatin mixed with a pigment — originally carbon black, from which the name derives ) is bathed in a potassium dichromate sensitizing solution, dried, then exposed to strong ultraviolet light through a photographic negative, hardening the gelatin in proportion to the amount of light reaching it.

A common variety consisted of a web of calico coated with boiled linseed oil mixed with dryers and lampblack or other pigment.