Table Tennis Rules continued

Now continuing with the rules of Table Tennis.
The Racquet:
can be any size, shape or weight but the blade shall be flat
and rigid. At least 85% of the blade by thickness shall be
wood. A side of the blade used for striking the ball shall be
covered either by regular rubber with pimples outward
having a total thickness, including adhesive, paste or glue
of not more than 2mm. The blade can also be covered with
"sandwich rubber" with pimples inward or outward having
a total thickness of not more than 4mm.
The pimples on the regular rubber can be evenly
distributed with not more than 50 per sq. cm. and not less
than 10 per sq. cm. The sandwich rubber can be a layer
of cellular rubber with a single layer of ordinary pimpled
rubber, not being more than 2mm in thickness.
The covering material can not extend beyond the outer
edge of the blade. The part nearest the handle, held be the
fingers can be left bare or covered with any material.
The blade and any layer of the blade shall be of even
thickness and continuous over the blade.
The surface of one side of the blade must be bright red,
and the surface on the other side must be black. Due to
wear and tear on the surface of the blade this rule may be
slightly bent because the color may not be completely
uniform.
A player must always show his racquet to the umpire and
his opponent before a match and if he changes his racquet
during a match.