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Historic paint analysis, or architectural paint research, is the scientific analysis of a broad range of architectural finishes, and is primarily used to determine the color and behavior of surface finishes at any given point in time. This helps us to understand the building's structural history and how its appearance has changed over time.
Titanium white, also Pigment White 6 or CI 77891 is a family of white pigments composed primarily of titanium dioxide. [1] It is the most widely used white pigment in contemporary artistic applications because of its affordability, low toxicity, and high hiding power .
Zinc white has a cooler hue than lead white, which tends to have a yellowish cast. [1]: 172 Zinc white generally needs to be mixed with greater quantities of oil than lead white in order to create a spreadable oil paint, which reduces its hiding power; on their own, lead and zinc white refract light more or less equally. [1]: 172
Metallic paint, which may also be called metal flake (or incorrectly named polychromatic), is a type of paint that is most common on new automobiles, but is also used for other purposes. Metallic paint can reveal the contours of bodywork more than non-metallic, or "solid" paint.
A metallic color is a color that appears to be that of a polished metal. The visual sensation usually associated with metals is its metallic shine . This cannot be reproduced by a simple solid color , because the shiny effect is due to the material's brightness varying with the surface angle to the light source.
Electrochemical coloring of metals is a process in which the surface color of metal is changed by electrochemical techniques, i.e. cathodic or anodic polarization. The first method of electrochemical coloring of metals are certainly Nobili's colored rings, discovered by Leopoldo Nobili , an Italian physicist in 1826.
Black for copper. Solution of sodium polysulfide 2.5%, items must be submerged in the solution after color developing, wash, dry and wax or varnish colored object. [27] Brown for copper. Items are boiled in at least 3-day-old water solution of 12% copper sulfate, after color being developed, the material is washed, dried and waxed or varnished ...
Also, the color of the other components of the paint has an influence in addition to the concentration of the pigment. A dark color, for example, forms a high contrast to the bright light spots and strengthens the effect. Favorable is also the use of a covering varnish in order to achieve an optimal effect. [4] [6]
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