7. Conditioning
7.1 Many thermoplastic materials do not require conditioning
prior to testing. Materials which contain volatile components,
are chemically reactive, or have other special characteristics
most probably require appropriate conditioning
procedures. Moisture not only affects reproducibility of flow
rate measurement but, in some types of materials, degradation
is accelerated by moisture at the high temperatures used in
testing. Check the applicable material specification for any
conditioning requirements before using this test. See Practice
D618 for appropriate conditioning practices.