 |
|
|
|
Instructions
for AD5:
Please
ensure Limestone is free from any dampness and
dust or loose material. Each application should
be done with a white lint free cloth soaked in
AD5 and applied by hand or machine ensure the
sealant is not allowed to puddle.It is very important
to ensure adequate ventilation, the drying sealant
gives of a heavy cellulose vapour. Allow to dry
for two hours then recoat using slightly less
sealant on second coat. If necessary a third coat
may be applied, this will increase protection
and begin to enhance colour. The sealant is also
able to seal grout and make it resistant to staining.
|
|
|
 |
Marble
is defined as being a
"Crystalline, compact
variety of metamorphosed limestone, capable of taking
a high polish."
From
ancient times through the present day, marble has been
one of the most important monumental and building stones
recognized for its quality and durability.
Marble
is also the most important stone used in sculpture -
the distinctive luster is due to the effect caused by
light penetrating a short distance into the stone and
then being reflected from the surfaces of inner crystals.
Italy has always been a leader in marble exploitation
since the days of the Roman Empire with the renaiscennce
sculpture of Michelengelo still among the finest in
the world.
Geologists
classify marble as a metamorphic rock, that is one that
has been formed when a change takes place in another
rock. Marble deposits are located in the older meta
sedimentary rock types.
Metamorphic
rocks are formed deep beneath the earth's surface by
extreme heat or pressure - they can also be formed when
rock is mixed with other substances (e.g. magma). Marble
is created from the metamorphosis of limestone, in which
recrystallization takes place at temperature and pressure
ranges varying from 500° C to 800° C and 5 to
10 thousand atmospheres. This results in the formation
of the crystals that give many types of marble their
striking effects.
It
is the effect of other minerals that give marble its
range of colours. Graphite gives black and grey colouration,
while oxides of manganese produce pinks. Yellow, brown
or cream colouration is due to the presence of limonite
- a type of iron oxide.
|
|
 |
