Rigid and Semirigid Plastics—The test specimen shall
conform to the dimensions shown in Fig. 1. The Type I
specimen is the preferred specimen and shall be used where
sufficient material having a thickness of 7 mm (0.28 in.) or less
is available. The Type II specimen may be used when a
material does not break in the narrow section with the preferred
Type I specimen. The Type V specimen shall be used where
only limited material having a thickness of 4 mm (0.16 in.) or
less is available for evaluation, or where a large number of
specimens are to be exposed in a limited space (thermal and
environmental stability tests, etc.). The Type IV specimen
should be used when direct comparisons are required between
materials in different rigidity cases (that is, nonrigid and
semirigid). The Type III specimen must be used for all
materials with a thickness of greater than 7 mm (0.28 in.) but
not more than 14 mm (0.55 in.).
6.1.2 Nonrigid Plastics—The test specimen shall conform
to the dimensions shown in Fig. 1. The Type IV specimen shall
be used for testing nonrigid plastics with a thickness of 4 mm
(0.16 in.) or less. The Type III specimen must be used for all
materials with a thickness greater than 7 mm (0.28 in.) but not
more than 14 mm (0.55 in.).