1. This test
method measures the angle of contact when a drop of liquid is applied to the
surface of a specimen of paper.
2. The
measurement of both the initial angle of contact and the angle of contact after
a defined elapsed period of time may be measured.
3. A standard
liquid (ink) for making measurements is described.
4. Other
liquids including printing inks, writing inks, adhesives, oils, and coating
materials may be used upon agreement of those involved in the testing being
done.
5. Two types
of apparatus for measuring the contact angle using the procedure in this test
method are described. Additional instruments that can perform the procedure in
this test method may also provide equivalent results. A different procedure using
an automated instrument for measuring angle of contact will be found in Test
Method D 5725
6. The values
stated in inch-pound units are to be regarded as the standard. The values given
in parentheses are for information only.
7. This
standard does not purport to address all of the safety concerns, if any,
associated with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine the
applicability of regulatory limitations prior to use.
