table tennis wiki

Table tennis tables, which are not weatherproof, are only suitable in dry rooms inside a building; they are not resitant to heat, cold, direct sunlight and humidity (relative humidity higher than 60%)

Play lines are printed by silkscreen-printing:

3tecWOOD premium 16 - 19 mm, mulitply coated, field of use: classes B, C and D
3tecWOOD premium 22 mm, multiply coated with special varnish, field of use: class B
3tecWOOD premium 22 - 25 mm, multiply coated with special varnish, field of use: class A plus all ITTF-approved tables and SDL

Models approved by the International Table Tennis Federation (ITTF) are labelled with the ITTF-logo as a proof. This is based on the test according to Class A with an additional test of labelling, colour, and sliding friction coefficient. Only ITTF-approved table tennis tables can be used at table tennis world championships.