Safety Precaution Sheet To be read carefully before use - Logitech Ltd

3. PREPARATIONS FOR POLISHING
3.1 Polishing Surfaces and Abrasives
The WG2 polishing system can accommodate the full range of Logitech 30 cm diameter lapping and
polishing plates. These include surfaces of cast iron, polyurethane and soft metal for which conditioning
and flatness gauging accessories are normally required. Many different lapping and polishing abrasives
are available for use in various diverse circumstances.
However, this manual is mainly concerned with standard polishing of rock sections, ores and similar
materials. For this type of work, certainly at the initial stages of process development, it is most generally
appropriate to use plate bases fitted with self adhesive synthetic polishing pads and diamond abrasive
polishing agents. Subsequent sections are confined mainly to use of the WG2 polishing system under
such ‘standard’ circumstances.
3.2 Fixing a Polishing Pad to a Plain Plate Base
Thoroughly clean the surface of the plain plate base with a mild solvent.
With clean, dry hands remove the polishing pad from its protective covering.
Partially remove the backing paper to expose approximately 25% of the adhesive surface. Do not allow
this surface to become contaminated.
Press the exposed part of the pad firmly onto the plate, taking great care not to trap air bubbles. A
pad of clean tissue is suitable for this purpose.
Slowly remove the remaining backing paper whilst pressing and smoothing the pad evenly onto the
plate base.
Note that if there are any air bubbles trapped a new pad will be required as pads cannot be peeled off
and re-used.
Using a sharp blade, trim off any excess pad from the periphery of the plate.
To prevent contamination, immediately cover the polishing surface with the appropriate clean plate
cover (< 25).
3.3 Care of Polishing Surface
It is strongly advised that each polishing surface is dedicated to one particular abrasive size or type. The
plate cover should always be fitted except when samples are being polished. Before fitting a cover,
thoroughly clean the inside with tissue and solvent to reduce the possibility of contamination. Fitting and
removal of plate bases should only be carried out with a plate cover in position. It is the responsibility of
the operator to avoid contamination from specimens, other plates, atmosphere etc.
3.4 Application of Abrasive
Diamond can be applied to the polishing surface in a number of different ways. An aerosol spray mixture
may be used or soluble diamond compound and lubricating fluid may be applied separately by hand.
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