ASTM F180-94(1999)
(Test Method)Standard Test Method for Density of Fine Wire and Ribbon Wire for Electronic Devices
Standard Test Method for Density of Fine Wire and Ribbon Wire for Electronic Devices
SCOPE
1.1 This test method covers the determination of, to an accuracy of 1.0%, the density of fine wires ranging from 0.25 to 0.02 mm (0.010 to 0.001 in.) in diameter, or ribbons of similar thicknesses, for electronic devices.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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. Specific hazard statements are given in Section 4.
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Designation:F 180–94 (Reapproved 1999)
Standard Test Method for
Density of Fine Wire and Ribbon Wire for Electronic
Devices
This standard is issued under the fixed designation F 180; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope cylindrical in shape to within 0.0025 mm (0.0001 in.) and of
uniform diameter and length. The length of the cylinder shall
1.1 This test method covers the determination of, to an
be approximately the same as the diameter and about 12.7 to
accuracy of 1.0%, the density of fine wires ranging from 0.25
25.4 mm ( ⁄2 to 1 in.). The surface of the cylinder shall be
to 0.02 mm (0.010 to 0.001 in.) in diameter, or ribbons of
smooth and free from defects, pits, or cracks. The corners of
similar thicknesses, for electronic devices.
the cylinder shall not be rounded.
1.2 The values stated in SI units are to be regarded as the
3.4 Thermometer, capable of being read to 0.2°C within the
standard. The values given in parentheses are for information
range from 10 to 35°C.
only.
3.5 Vacuum Pump and Desiccator—A vacuum pump ca-
1.3 This standard does not purport to address all of the
pable of producing a vacuum of 0.1 mm Hg and a vacuum
safety concerns, if any, associated with its use. It is the
desiccator.
responsibility of the user of this standard to establish appro-
3.6 Hook suspended by a fine wire about 0.08 mm (0.003
priate safety and health practices and determine the applica-
in.) in diameter, both made of corrosion-resistant material, for
bility of regulatory limitations prior to use. Specific hazard
supporting the test specimen while weighing it in the liquid.
statements are given in Section 4.
3.7 Cradle suspended by a fine wire about 0.08 mm (0.003
2. Terminology in.) in diameter, both made of corrosion-resistant material, for
supporting the standard volume cylinder while weighing it in
2.1 Definition:
the test liquid.
2.1.1 density—the weight per unit volume, expressed in
grams per cubic centimetre, in accordance with the following
4. Test Liquid
equation:
4.1 The test liquid in which the test specimen and standard
D5 W/V
volume cylinder are to be immersed while being weighed shall
be pure, stable, and shall have a low viscosity, low surface
where:
tension, low vapor pressure and a density of not less than 2
D5 density of the specimen
W 5 weight of the specimen, g, and g/cm . Tetrabromoethane and tribromomethane have been
V 5 volume of the specimen, cm . found satisfactory for this purpose.
4.2 Precaution —These liquids are moderately toxic and
3. Apparatus
should only be used by those familiar with the hazards
3.1 Balance—Asuitable chemical balance capable of being
involved.
read to 0.1 mg. 4.2.1 Tests should be carried out under a fume hood. The
3.2 Micrometer, capable of being read to 0.002 mm (0.0001
fluids used should be considered potentially dangerous.
in.) 4.2.2 Hazard—When treated, highly toxic fumes are given
3.3 Standard Volume Cylinder—A cylinder of standard
off. Prolonged inhalation can cause unconsciousness.
volume made from corrosion-resistant material such as nickel, 4.2.3 Treatment—Fresh air; artificial respiration if uncon-
scious; oxygen if required.
This test method is under the jurisdiction of ASTM Committee F-1 on
Electronics and is the direct responsibility of Subcommittee F01.03 on Metallic
Materials.
Current edition approved Dec. 15, 1994. Published February 1995. Originally
published as B180–43T. Last previous edition F180–72(1989). See Sax, N. I., Handbook of Dangerous Materials, 1951.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 180
5. Test Specimen 8. Calculation
5.1 The preferred length of wire or ribbon required for the 8.1 Density of Test Liquid—The density of the test liquid
test specimen shall be such that the volume is approximately shall be calculated as follows:
3 3
0.5 cm . The use of a specimen of less than 0.2 cm is not
d 5 ~w 1 c 2 w !/v
a l l
recommended.
where:
d 5 density of test liquid, g/cm ,
6. Preparation of Specimen
w 5 weight of standard volume cylinder in air, g,
a
6.1 The wire or ribbon shall be wiped and loosely wound
c 5 weight of cradle in liquid, g,
l
into a small coil and bound with wire of the same composition
w 5 weight of standard volume cylinder and its support-
l
in such a manner that no loose ends project from the body of
ing cradle in liquid, g, and
the coil in order to produce a compact coil sufficiently loosely
v 5 volume of standard cylinder, cm .
wound to permit penetration of the test liquid upon immersion.
The density of most liquids varies considerably with the
The test specimen shall be thoroughly cleaned of lubricants by
temperature. If the weight of the specimen and the weight of
washing or boiling in suitable solvents and thoroughly drying
the cylinder have been determined at different temperatures, it
in an oven.
will be necessary to apply a
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