FEATURE SANDING Garnet (reddish brown in colour) Aluminium oxide is generally
is a natural abrasive which is not
used for grinding
friable like aluminium oxide and
• Carbon steel
wears out faster. This is not
• Alloy steel
necessarily bad, because garnet
• High speed steel
will produce a smoother surface
• Annealed malleable iron
than aluminium oxide of the same
• Wrought iron
grit number, but will cut slower.
• Hard bronzes.
This abrasive is an excellent choice for final sanding, as it seals off the
Sandpaper with silicon carbide (black
wood’s grain, and is particularly good
in colour) abrasive is suitable for use
for soft wood, such as pine.
on harder materials, such as metal, plastic and fibreglass, because it is
OPEN AND CLOSED
harder than aluminium oxide and
garnet and can be used for wet-
Open coat sandpaper is used
and-dry sanding. It is also a friable
for woodworking where a lot
abrasive and is good for sanding low
of sawdust will be present.
tensile materials, such as aluminium,
There are spaces and gaps
copper, brass and cast iron.
between the grits, which help prevent clogging by giving the
Silicone carbide is used for grinding • Grey iron • Chilled iron • Brass • Soft bronze
sawdust a place to go. These spaces and gaps can cover 40% to 60% of the sandpaper’s surface. Closed coat sandpaper is better for sanding metal and wood finishing.
• Copper • Marble • Rubber • Hard facing alloys • Glass.
// ABRASIVES COME IN ALL SHAPES AND SIZES, INCLUDING SHEETS, BELTS, ROLLS AND DISCS //
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