| Basalt standard sizes are :
Tiles
:
| Sizes |
Thickness |
| 305X305mm,457x457mm
300x300mm, 400X400 mm |
10
mm, 12 mm, 18 mm, 20 mm 25 mm, 30 mm, 40 mm |
| 600X600
mm |
18
mm, 20 mm 25 mm, 30 mm, 40 mm |
Slabs
:
| Size |
Thickness |
| 180x60
cm |
18
mm, 20 mm, 30 mm, 40 mm |
| 200x100
cm and above |
18
mm, 20 mm, 30 mm, 40 mm |
Parameters definition :
Polished
- To smooth or brighten a surface increasing the reflective
quality and luster by chemical or physical processes.
Generally gloss levels should be + 90 as measured by a
gloss meter. To achieve this, final polishing should have
been done by latest Italian/ French machines using imported
abrasives.
Buffing:
Using a non-abrasive pad attached to a machine, which
rotates the pad in a circular fashion over the stone,
generally between 150-300 RPM. Polishing formulations
containing micro-fine abrasive materials are used with
buffing to produce a more reflective gloss on the surface
of stone. Waxes are also used with buffing to enhance
the gloss of polished stone.
Honed
: To grind a surface with a high grit material
to a uniform specification without producing a reflective
surface.
Sawn
- i.e. unpolished. It is not advisable to buy this
way because : floor polishers do not give as good a polish
as factory machine polishers. many defects are not visible
easily before polishing.
Calibration
: To grind a surface with a high grit material to
a uniform surface to maintain the thickness variation.
Gangsaw
: To grind two sides of the stone surfaces with a
high grit material to a uniform specification without
producing a reflective surface.
Shade
variation - Slabs / tiles should be sorted
to ensure uniformity of shade. Normally, any colour can
be sorted into three shades. Sorting is simple -just lay
all the material on the floor and look from different
directions.
Colour
patches - These are darker or lighter patches
or bands of single colours due to mineral localisation.
Scratches
: The marring of the surface caused by physical
trauma such as small stones or sand embedded in shoes
scraping across a marble floor.
Staining
: The absorption of foreign pigments
or oils into the porous stone causing discoloration.
Free
lengths : i.e. lengths varying randomly while
width is constant are also very attractive. Choose the
widths as per the expected floor area. Buy random lengths
and cut at your site to fit.
Flatness
Tolerances
A 4’ dimension in any direction on the surface shall determine
variation from true plane, or flat surfaces. Such variations
on polish, hone, and fine rubbed surfaces shall not exceed
tolerances listed below or 1/3 of the specified joint
width, whichever is greater. On surfaces having other
finishes, the maximum variation from true plane shall
not exceed the tolerance listed below or + 3 mm of the
specified joint width, whichever is greater.
Polished,
honed or fine rubbed finishes... + 0.5 mm
Sawn, Calibrated, 4-cut and 6-cut....
+ 1 mm
Edges
also can be chamfered / bevelled. Chamfering removes whiteness
and chipped edges. This looks very good. Chamfering is
a simple process in which a polishing brick is run at
an angle of 45 ?.
Quality
Details :
Polished
Basalt
a. One Side Fine Mirror Polished.
b. Gangsawn/Cutter side
c. Thickness variation is + 0.5 mm to 1 mm depending upon
Tile/Slab.
FINISHES
The
stone is available in a range of eight smooth and textured
finishes:
-
WATERJET:
a non-slip matt finish, produced by working the surface
of the stone with high-pressure water jets.
-
HONED:
a smooth finish with a slight sheen, produced by using
a polishing head.
-
SANDED:
sawn stone slabs are coarsely polished: this removes
saw marks and leaves a semi-smooth, regular finish.
-
CLEFT:
with this traditional treatment the stone is riven
along its line of cleavage to reveal the natural grain;
this gives an undulating surface with great character.
-
GRITBLASTED:
a high-pressure airline projects coarse-grained grit
onto the top surface of the stone producing a finish
similar to cleft, but available on slabs of greater
size.
-
FLAMED:
the top surface of the slab is burnt off, giving an
irregular textured
-
FINISHTEXTURED:
the top surfaces of sawn slabs are pneumatically tooled
to produce a pitted or grooved surface.
We
are continually developing the range of finishes and can
supply Sample showing all materials
and finishes. If you require a specialised effect we will
be happy to discuss with you how it can be achieved.
PACKING
TILES
AND SLABS ARE PACKED IN STYROFORM BOXES AND ARE FURTHER
PACKED INTO WOODEN CRATE. POLYTHENE WRAPPER
IS MADE TO COVER THE ENTIRE MATERIAL INSIDE THE WOODEN
CRATE. FOR RANDOM SLABS, EACH SLAB IS PACKED IN A SEPARATE
POLYTHENE WRAPPER, TO REDUCE OR TO AVOID SCRATCHING
OF TILES AND SLABS WHICH ARE PACKED FACE TO FACE. |
