01-25-2008, 10:53 PM
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Join Date: May 2005 Location: NY
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| DOSCH Textures Germany, Jan 25, 2008 - DOSCH Textures: Rocks released. Dosch Textures: Rocks provides 100 meticulous depictions of seamlessly tile able rock and stone textures. Contained are various sedimentary stone types (limestone, sandstone; often porous structure), as well as crystal-based igneous rocks (granite, basalt, quartz) of varying grain-size. Also included are marble patterns. All textures can be applied to 3D-models comprising a multitude of themes. These high-resolution (2048 x 2048 pixel) Dosch textures can be used for animations, architectural visualization, and for all kinds of computer graphics or print applications (e.g. catalog, magazine). The multi-layer textures (provided are color- and bump-map for each texture) which can be used in most 3D-animation and CAD applications, are all provided in the JPEG-format with the highest quality-settings. Please use the "PDF-Overview"-link above for a complete list of all textures contained in the product. All textures are license-free and can therefore be used without any additional cost in all* commercial productions. (* view License Agreement)  |  |  |  | | Marble | MARBLE: CHARACTERISTICS
This standard includes general information on the characteristics
and common uses of marble and identifies typical problems
associated with the material.
INTRODUCTION
Marble is an extremely hard, metamorphic stone composed of calcite
(CaCO3). It is formed as a result of the recrystallization of
limestone under the intense pressure and heat of geologic
processes. The effect of this process is the creation of a stone
with a very tight crystalline structure and small but definite
porosity. Because of its structure, marble can take a very high
polish and is a very popular decorative stone for architectural and
sculptural uses. The limited porosity of marble, especially
polished marble, makes it less vulnerable to the leaching effects
of water. Calcium carbonate, however, of which marble is composed,
is highly susceptible to attack by acidic agents. Marble is
readily dissolved by acids, even very dilute acids, however the
actual results of acidic exposure will vary with the nature of the
acid. Chlorides, nitrates, sulfates and other chemical compounds
react differently with marble and produce various by-products,
which have a wide range of solubility and impact on the durability
of marble. For this reason, it is always important to determine
the exact type of pollutants causing marble deterioration.
Marble itself can be of two types, one composed of calcite and the
other of dolomite. Dolomitic marble is much more resistant to acid
attack than calcite marble. The color of marble ranges from the
brilliant white of calcite to black, including blue-gray, red,
yellow and green, depending upon the mineral composition.
TYPICAL USES
Marble has many decorative and structural uses. It is used for
outdoor sculpture as well as for sculpture bases; in architecture
it is used in exterior walls and veneers, flooring, decorative
features, stairways and walkways. The way in which the stone is
used may be a factor in limiting or controlling the severity of
exposure. The use or function of the marble may also affect the
feasibility of applying certain treatments, but type of use is not
the primary factor in the major types of deterioration and damage
to which marble is susceptible. | |  |  |  |  |
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